Thumper heads vs Powerheads? Input requested

90mustangGT · Dec 18, 2003

thumper460 said:
Merry Christmas....Ya'll

Just me...........................

Thumper

I like your style Mike!

In My Opinion:

Thumper's heads are a good stepping stone. I really like the heads, the car does it's best work in 4th gear. When I did the heads, intake, TB, EGR, and RR's, I could have bought some new Aluminun heads but I wouldn't have enough for the intake, TB, RR's, ect. I think I gained more from all the mods rather than just heads alone, maby I am wrong. Now that everything else is done, I might be upgrading again with the RPM upper, AFR 165's, and maby rebuild the shortblock with a little more compression.

I think Powerheads are too pricy. Thier base price in something like $800 and that doesn't include upgraded springs. With those I would say your wasting your money. I did the Thumper's for I think a total of $695 all said and done with springs, and there is no valve float at 6200rpm's and still is strong. Thumper heads might not be the best out there, but they are damn good.

If you think ported E7TE's are junk, then don't buy them. I don't think they are and neither do the rest of us who have them, even a few ex-thunper headed customers will still agree they do very well.

I'd love to see someone with a stock 302 shortblock that's naturally asparated especailly with a combo similar to mine but with aluminun heads bust my arse on the highway. I wanna see it, I am in the Atlanta area. Not trying to be cocky, but I just want to see how bad I am suposed to loose.

BTW: OcalaFox, please don't confuse EDC and cleanlx with Tomato, they didn't insult anyone. They just stated thier facts, but Tomato just insults people, made lots of comments w/o backing it up with any real facts and constantly counterdicted himself.

Sir Hacksalot · Dec 18, 2003

You know, this is about the bazillionth thread I have seen on this, and essentially, I have come to a couple of conclusions:

Thumper's customers seem satisfied with what they bought. I have yet to read about a single dissatisfied customer.

EDC's customers satisfied with what they bought, and also have yet to read about a single dissatisfied customer.

Thumper seems like a genuinely nice guy, and if you want to buy his heads, cool, if not, cool. I have never seen him 'rip' on another persons product, or choice in the matter, he just exudes confidence in what he sells.

EDC, comes across as a pompous ass, and if you want to buy his products, fine, if not, fine. EDC has repeatedly ripped on Thumper, and those that buy his product. EDC has a reputation of a fine cam grinder, and machinist and is widely known for building some powerful combos. That being said, he still comes across to me, as a dick. He very well may be the nicest guy in the world, but if he is as good as he seems, he wouldn't need to bash on someone else's product.

I may be wrong, and it wouldn't be the first time, but that's the way I see it.

Hax

RydeOn · Dec 18, 2003

Merry xmas to you too thump.
Ive heard alot of good things about thumpers, and id prefer them over any other non aluminum head. If you look at his site and talk to him you would know he and tmoss are very knowledgeable people. And their work is QUALITY. I just wish I had even enough $$ to buy them. As soon as I do, Im gonna give him a hollar!

And thanks to tmoss, you made my day with that chart. It looks like my goals will come easier than Id previously expected!

Highbredcloud · Dec 19, 2003

Guys...I did not mean to start a flame war here. I apologize if this turns out as one.

Here are some things I'd like to clear up. I already have a "fast enough" car for me...look in the sig. The car in question will be a daily driver. Meaning I will have to drive the thing everyday including winters. With that said here is the criteria I want to stick by:

1. The car has 100K miles on...is it worth getting $1000+ aluminium heads on it?Don't know yet...haven't gotten a compression test done to the engine.

2. I MUST keep the stock T-5 in the car since I can't afford a Tremec like in my summer car...(yes its a 5 speed now ) So I need a set up that is not too radical for the street meaning if I go with aluminum heads that are larger than 160cc I will need a better cam, intake injectors etc...In other words I don't want to make more HP than my T-5 can handle. Yes I know it depends on how I drive and I know not to powershift or launch with slicks etc...etc...

3. I am on a budget

4. I need a car that is reliable as a daily driver with more power than stock., use 19# injectors, keep the stock fuel pump, keep the T-5

-Mike (thumper460) Thanks for the pm...cleard up a lot but I still new some answers.

-Sir Hacksalot: Have you ever talked to Ed? You ever do any business with him? If you have answered NO and NO than really please keep your opinions to yourself about the guy...Ed has helped me on more than one occasion even whent it did not concern the HIS cam. His opinion matters to me and I'd like to hear it. However, I did not start a thread Thumper heads vs Aluminum heads!!! So please guys stick to the subject. I'm not a stupid...I'll take aluminum heads over cast iron heads any day BUT cast iron heads (thumpers) that flow close to out of the box aluminum heads (GT-40X and more than GT-40Y) and are about $300-$500+ less than aluminum heads do strike my curiosity. The only disadvantage I see to the Thumper heads is the weight factor...but for the price...I don't see an aluminum head that is a competitor...not even a cast iron head that flows close to what thumpers do besides that powerheads which was the original intent for this thread...THUMPER HEADS VS POWERHEADS!

-Greg

Sir Hacksalot · Dec 19, 2003

Highbredcloud,

No, I have not bought from Ed, and neither have I bought from Thumper. In my line of work, I deal with competitors on a daily basis, and they way I see it, There are two types of people.

There are those that will elevate their companies based on the quality of the finished product that they sell, and then there are those people that elevate themselves and their company based on tearing down their competition.

I see a bit of the latter in Ed here in this forum, as well as at Corral.

Based on the numbers of folks I see with FTI combos and products that are putting down some amazing numbers and running some seriously good times, there should be no need for Ed to rip on some Thumper owners as I have seen him do, or denegrate ANY other product out there.

FTI seems like a quality company that sells a quality product and delivers excellent service. Why in the hell the owner would feel the need to 'lower himself' in a debate with people that obviously either 'cannot afford' his product, or do not want to purchase his product (read THUMPER FANS/CUSTOMERS) is beyond me.

In sales and marketing, perception is reality, and the perception that I pick up from EDC on this board is not one of customer friendliness, and courtesy. EDC may be the nicest man on the face of the earth, but the image that is projected on the 'thumper' threads is not that one.

A perfect example of this behavior would be reading RIO50's experience with the Thumper heads. Almost throughout the entire thread, all EDC did was essentially tell the guy he wasted his money, had crap heads, and was swindled by Thumper. Ironically, Rio was perfectly happy with the results of his head/cam/intake swap, or at least seemed to be, despite 'not running the number' in the 1/4 mile he wanted, or posting the dyno numbers he wanted in a new, untuned combination.

Let me put it this way, EDC's comments since I've been reading this board have not necessarily driven me to purchasing Thumper's heads, but they sure as **** have not pushed me to wanting to deal with FTI either. AFM or Buddy Rawls might be the biggest bastards on the face of the earth, but at least they have the sense of a winner to simply stand by their product and let the chips fall where they may without telling people they are morons.

Hax

PURESTREET5006 · Dec 19, 2003

No more head comparisons please!!!!!! You guys should now what heads you wanna use already or better yet pick up a MM&FF or 5.0 Magazine and look at all the combinations these guys are runnnung anad another thing EDC is a very good person to deal with for your N/A combinations and he does have combinations for IRON HEADED users as well.

sleeper89 · Dec 19, 2003

hax - i feel where you are coming from, but remember, peoples tone/emotions aren't always conveyed properly over the internet. for that matter some people cant convey their emotions in person. Ed is a very intelligent cam grinder and willing to help others get the most for their money no matter the combo. but for a lot of people it doesn't make sense to use stock stuff when there is so much better out there. then there are guys like me with very little into my ported e7's so it was worth it in the end.

anyhow, back to the original question: i would "think" thumpers are the better head of the two because he keeps the smaller valves (more velocity = better low lift flow) but the powerheads are cnc ported so they will give very consistent results from head to head

-steve

EDC · Dec 19, 2003

Sir Hacksalot said:
Highbredcloud,

No, I have not bought from Ed, and neither have I bought from Thumper. In my line of work, I deal with competitors on a daily basis, and they way I see it, There are two types of people.

There are those that will elevate their companies based on the quality of the finished product that they sell, and then there are those people that elevate themselves and their company based on tearing down their competition.

I see a bit of the latter in Ed here in this forum, as well as at Corral.

Then there's a third kind... Those that spew BS and hype about a product that doesn't work as well as their ad campaign... Like Tornado, Splitfire spark plugs and the others...

Trouble is, if someone dare to speak the truth about these "hyped" up parts, their users get in a tizzy... Like it's their duty to defend the product even though, in their heart of hearts, they know got screwed...

You don't like my comments on Thumper's heads or workmanship.. fine. You have your right to do so. I also have the right to speak my piece about what I have seen, held in my hands and have seen the end result of their usage.

I'll never be worried or scared to loose a customer for speaking the truth. That kind of customer probably just bought a Tornado or Slick 50 for their car and actually believes they just got 25% more mileage. My customers are a lot more intellegent than that and will not fall for that type of crap....

Based on the numbers of folks I see with FTI combos and products that are putting down some amazing numbers and running some seriously good times, there should be no need for Ed to rip on some Thumper owners as I have seen him do, or denegrate ANY other product out there.

You see, there are facts written and in print from FTI combinations. No hype or BS. Customers obtain the results they paid for. Documented results... I'm still awaiting the actual Thumper results... With his claims of hundreds of heads out there, there's got to someone local here in the northeast that can show me some twelve second time slips!!

Now, for my views on the "hype"... I informed the forum users what I have "seen" from Thumper heads and their end results, and they weren't up to the marketing hype. I also have told the forum users that there are better and more effective products out there for their money. The Thumper clan took it as a personnal attack rather than comments about the product... That's their issue...

Now... have you even seen or held a set of Thumpers heads? Have you purchased a set of the "magic twelve second heads? NO.. by your own admission! You think they are great even though you have never purchased a set nor seen any actual results? Why?

Well I've had two sets here and I'm still not impressed... I've checked the machining, the tolerances and even flowed them. If I was a "real bad guy" like you are tying to portray me, I would post my data and let the "cards fall where they may". However I "prefer" not to do so and offer people other choices.

That's why I tell people who ask, look elsewhere for another choice for more bang for your buck.

BTW... You sure are very hypocritical. Why is it OK for you to say things about me or my company without actually dealing with FTI yet you slam me for expressing my opinion on what I HAVE seen and analysed?? Buy a set, do your own testing and then tell us what you think.

FTI seems like a quality company that sells a quality product and delivers excellent service. Why in the hell the owner would feel the need to 'lower himself' in a debate with people that obviously either 'cannot afford' his product, or do not want to purchase his product (read THUMPER FANS/CUSTOMERS) is beyond me.

See, here you go again... I offered plenty of other affordable choices but you seem to have missed this. Maybe because, again, you have never called or contacted me.

In sales and marketing, perception is reality, and the perception that I pick up from EDC on this board is not one of customer friendliness, and courtesy. EDC may be the nicest man on the face of the earth, but the image that is projected on the 'thumper' threads is not that one.

Perception is reality? OK... then OJ is really innocent because he looks good in a suit?

What business school teaches this? Enron University?

You obviously have issues with facts and truth. Otherwise you would never say that perception is reality. The real truth is, when a product is deficient, it doesn't take long for the public to find out, no matter how much marketing or salesmanship is out there. It normally dies a just death.

Mike has my compliments! He is the ultimate in marketing and salesmanship that I've seen in years! His posts are 100% spam and the forum moderators allow this. His followers are right there defending their "seat of the pants" power but have yet shown anything valid or documented. I guess for the uninformed enthusiast, perception may be reality but as I mentioned, the customers I work with are a lot more intellegent and can see through the smoke and mirrors...

A perfect example of this behavior would be reading RIO50's experience with the Thumper heads. Almost throughout the entire thread, all EDC did was essentially tell the guy he wasted his money, had crap heads, and was swindled by Thumper. Ironically, Rio was perfectly happy with the results of his head/cam/intake swap, or at least seemed to be, despite 'not running the number' in the 1/4 mile he wanted, or posting the dyno numbers he wanted in a new, untuned combination.

Rio is happy? Hmmmmm... One of my customers is local to him and I guess there's a definite difference in opinion on the results. Have you ever spoken to Rio? I have, and we will be working together this season at NED to find out what can be done to get him more power. Are you coming by to help???

Have you heard about the guy right here in RI that got a set of Thumper heads? He was really unhappy with his combo... One of the shops I sell worked on that car and told me he was so dissappointed with the Thumper results he sold the car!

Get facts and not supposition. Then type.

Let me put it this way, EDC's comments since I've been reading this board have not necessarily driven me to purchasing Thumper's heads, but they sure as **** have not pushed me to wanting to deal with FTI either. AFM or Buddy Rawls might be the biggest bastards on the face of the earth, but at least they have the sense of a winner to simply stand by their product and let the chips fall where they may without telling people they are morons.

Hax

Like I stated before... My customers are a cut above the rest and don't get caught up in all the hype and BS... They want honest and accurate information and are happy to deal with someone who doesn't worry about upsetting the apple cart if some people get their panties in a wad. Ask any actual FTI customer about total customer support as well as their results... Facts don't lie!

Maybe you're just not ready... yet..

BTW... I did ported stockers (D0OE and E7) years before Thumper even had a computer. We were featured in MM&FF as well as 5.0 magazine with the results. Got quite a few guys into the elevens too. However, they were NOT $700 heads and that's fact, not fiction! I know what I speak of on ported stock heads... You get what you pay for!

Ed

cleanLX · Dec 19, 2003

I did not know you had the oppertunity to look over/flow Thumper heads.
I've often been skeptical about the flow numbers posted.

I'm also skeptical about the flow numbers that I've been given for my heads. So much so, that they are now at a different shop, being base line flow'd, and 'cleaned up'.

This has taken my once $400 E7's to now $600... I'm approaching the point of madness for money spent on stock heads. At this point in the game I'm wishing I'd just stayed with stock heads... at least I know the stockers were good for 12's.

I had a rule that every $100 bought a tenth. I thought $400 for the assembled heads/rockers was a close call, but I'm not at all confident my $600 is gonna give me 6/10ths.

I'm a wacko, or stuborn, or a "cheerleader" in that I want to run the stock heads, but I don't think my 100bux/tenth budget will have stood this experiment.

Sir Hacksalot · Dec 19, 2003

Ed, you really should look into a communication class as you missed the entire point of what I was trying to say. In fact, I have to say that the fact that you even responded to me is indicitive of exactly what I am talking about. You as a business owner should be above this. It's just bad form to rip on someone else's product so that it makes yours look that much better, and you can call it 'saying it as it is', but that's exactly what you end up doing.

I want you to read this closely: I did not slam FTI's products/services in the least, in fact, I thought I paid your company a heck of a compliment by stating that FTI's reputation is stellar, and does deliver what they promise. I did go back however and re-read my posts, and then re-read your response Ed, and all you did was make it even more clear that you are just a pompous self-indulged baby.

I did slam you for allowing yourself to get embroiled in petty debates, and trashing someone else's product or service instead of simply standing on the merits of your own. To denegrate the 'competition' instead of standing on the attributes that you bring the table is the sign of a loser. It's no different than when two candidates run for office. The candidates have a choice in how they can run their campaign. They can either run on Why they are the person for the job, what they believe, and what they can do, or they can run a campaign on why the other guy is a jackass, is a screwup, and how he's going to screw you as the voter.

The image that I perceive from you when you get embroiled in the Thumper debates is not that you are a highly skilled technician that is trying to help, and inform, you come across like Nick the Company Computer guy on SNL as a pompous, arrogant bastard that thinks that anyone that doesn't use his products/ideas/services is a mindless cretin that is not worthy to be in his presence.

Thumper may be full of crap, and then again, he may not be. If he is, he doesn't need you to beat him down, it will seek it's own level. On the flip side, you very well could be the best in the business....and you don't need to beat someone down to prove it either...that water seeks its own level as well. The proof is in the pudding and the results. As the owner of FTI, and a professional you should be above all this, and stand on the merits of your own product, not be denegrating someone else.

As for not being ready yet, nope I am not. I don't have the cabbage to spend on a rebuild and HCI set up from you or anyone else. However that will change in about a year. That being said, the perception that you convey is one that will create the reality of me buying from someone else that is equally qualified, but has enough confidence in what he does to stand on those merits alone.

That's just the way I see it.

Sir Hacksalot

5.0Droptop · Dec 19, 2003

To compare Aluminum heads to e7te heads is like comparing apples to oranges its not fair. I understand EDs concern in that Thumper has advertised his heads as capable of 12's HOWEVER there are those out there doing it. Thumper NEVER promised me that My heavy Vert would run in the 12's N/A ...however Mike did tell me that I would see a big difference in power/Tq. I told him what I wanted and discussed my plans with others who have built motors. They told me with the parts I chose I would be happy. My car does have more power and torq. I am happy with it!
My point is... you need KNOW you what you want and know what you can afford to do. You need to set a GOAL and work towards it.
Obviously Ed is in the market to help people who KNOW what they want, attain there goals of 12's 11's 10's etc.... I knew I wanted more power. I knew wanted to have good low end torq and I attained my goal with out breaking my budget.
Ed nailed me in a thread once before and said I could have made it to 12's eaisly with his parts.. and he is correct, However I didnt have the money to spend to get Eds parts and all supporting parts that I would need ...so I chose another route. I am happy with it, and in the end thats all that matters.
Ed dosent need to come on here to try to make his products look better, Anyone who knows what FTI stands for knows it is quality.
Someone said Thumper heads are a good "stepping stone" I think thats a nice way to put it. I stepped from bone stock with bolt ons to thumpers, tmoss, and a mild cam. Now I stepped up to the cobra intake, elec fan, subframes,mass air, etc.
Its all about your goals, if you know you wont settle for less than 12's then pick your parts accordingly.
If your not worried about the et and you just want to step up the performance then pick your parts accordingly.
As with any combo each part must support the next part and they need to work together.
Ed entered a thread that Mstang started on 50tech and he told Mstang what the problem is. His parts dont work together plain and simple. And it made perfect since. Ed can seem kinda gruff in his expressions but you dont see Mike "Thumper" arguing with him do you? No the reason is because Thumper has satisfied customers just like Ed has satisfied customers and In any business at the end of the day Having satisfied your customers is a good thing.
I know there are those who have bought thumper heads and were disappointed and I also know there are those who bought AFR heads and were disappointed, I have read threads on both side of the boards... We "People in genral" set unrealalistic goals and then when we dont meet them we are not happy. Well thats Life! Live and Learn the hard way, Or listen to people who can guide you the right way the first time. Learn to take criticism, Learn to listen,Learn to read thru the BS and Hype and Know what your Buying. There are people who always have to learn by trial and error and there are those who always go to the pros and get it right the first time. But when you go to the PROS you have to be ready to pay the price. I knew what I wanted and worked towards it, I went to those who know. People with years of experience. They told me go with alum heads like afr etc.. I said this is my budget, can I realistically do that and still meet my goals They said no.. But here is an option , here is another option, and another, and finally I picked my parts met my goals and its done. Is it as fast as I would like it to be ? Heh will it ever be as fast as Id like it to be LOL I doubt it!

Highbredcloud · Dec 19, 2003

WTF guys? What about me? I'm the one that needs the *****en advice here and all I see thus from from Ed and Sir Hacksalot is an internet flame fest. Back to your time out corners guys...no really please save your strangth for round #2. The only one I don't see involved in this is the guy in question (Thumper460) and I think I know why.

Did any of you read my criteria for my daily driver? I thought I made that quite clear. THIS IS WHAT I WANT TO STICK BY.

-Ed...You know exactly how you are since you told me over the phone when I first became your customer...remember? I don't have anything against you, in fact I appreciate everything you've done for me so why in the hell would you carry a pointless argument with Sir Hacksalot when he does not know you nor does he ever done business with you or Thumper460?

Instead of typing an essay about nothing in particular that you know is not ture as well as every other FTI customer including myself regarding your company could you PLEASE help me here by putting your knowledge and experience to help a guy out? You keep emphasizing on how your customers are above and beyond the average Joe interms of knowledge...well I'm young, stupid, inexperienced, gullible, and I still work out of the Haynes Mustang Manual which takes me 10x longer do things than anyother experienced mechanic.

With that said if you decide to help cool...I did some re-search and this is what I came up with. Please keep in mind that I know that aluminum heads are better than cast iron heads in almost everyway but price is an issue here so please don't tell me that a set of $1500.00 heads are better than a set of $600.00 heads because I already know that.

According to powerheads.com the flow numbers are for power heads are:
CNC ported
Inake valve 1.90 exhaust valve 1.60

Intake: .100 .200 .300 .400 .500
64 124 190 or 176 213 or 204 217

Exhaust: .100 .200 .300 .400 .500
64 109 150 170 174

Price- $695.00 + core charge + shipping = A lot for cast iron heads

Thumper heads as according to thumper's website: http://www.thumperoforangepark.com

can't find info on the flow rates from .100-.300 but at .400 on intake/exhaust is 196/150.5 at .500 the flow is 219/154 and Thumper uses stock E7TE valves to increase velocity.

Price-$595.00 + $100 refundable core charge plus free shipping.

according to http://home.isoa.net/~mharrisj/fordhead.html

A set of GT-40 Y303 heads

Intake valve 1.94 exhaust valve 1.54

Intake: .100 .200 .300 .400 .500
64 114 167 199 213

Exhaust: .100 .200 .300 .400 .500
52 98 128 137 134

Price- New from summit= $999.00 eBay new they are $890.00 or less if used not buy much.

GT-40X heads

Intake 1.94 exhaust 1.54

Intake: .100 .200 .300 .400 .500
66 126 173 203 216

Exhaust: .100 .200 .300 .400 .500
53 105 145 150 149

Price- $1300.00 new from summit eBay new $1150.00 cheaper if used not by much.
CNC ported
AFR 165

Intake 1.90 exhaust 1.60

Intake: .100 .200 .300 .400 .500
N/A 123 186 225 250

Exhaust: .100 .200 .300 .400 .500
N/A 118 153 178 185

Price-$1325.00 new. Can't find them cheaper on eBay either.

Now I have learned that flow numbers mean absolutely nothing at times...it's the rest of the combo as well. With either Powerheads, Thumper Heads, or GT-40 Y303 Heads, I'm pretty sure I can run the stock cam, #19 injectors and still not exceed the power rating for the T-5 assuming that I take precautions while I drive.

With the GT-40X heads and the AFR 165 there is no way I can run a stock cam without reving the a 100K motor up high in the RPM's and frankly I don't think that is too good with a motor that has so many miles on it. I would really be pushing the T-5's limit...and I would have to upgrade to bigger injectors like 24#'s. As you can see I would also have to get a bigger intake as well. This is just the must have's with the bigger heads than 160cc...that does not include other goodies like suspension...but that is not the point with just those heads...that's optional IMO and will not be the focus here.

For the money...It seems that Thumper Heads are the cheapest in price and offer nice flow numbers. Powerheads are A LOT for stock E7TE heads ported...GT-40Y's are worth considering but they flow just as much as Thumper heads but are aluminum therefore are lighter on a side note but are also more.

Do you have any other suggestions? Better combo heads for the money that I have listed? Forget about the GT-40P's since they take different headers and I will use headers from my "summer car" when I switch to long tubes. Instead of saying that something is bad without giving a reason for your opinion should not be considered valid. Post a reply here or send me a PM if you wish.

For the rest of you that wish to contribute your opinions PLEASE keep in mind that car set up for this car is A DAILY DRIVER and must be a reliable combo...I will have to drive that thing through the warm the wet and the slippery to get from point A to point B.

-Greg

EDC · Dec 19, 2003

Highbredcloud said:
WTF guys? What about me? I'm the one that needs the *****en advice here.
-Greg

You're right Greg...

Email me...

edcurtisfti@cox.net

Ed

Someguy80 · Dec 19, 2003

LMAO these threads are great. Hi Ed

Mike

timk · Dec 19, 2003

Someguy80 said:
LMAO these threads are great. Hi Ed

hey, if anyone cares, i'm getting the car dyno'd in the morning tomorrow. you guys can check it, make fun of me, applaud me, or whatever you want. the car is untuned, but i don't have the money, so curiosity got the most of me. local dyno day is just so cheap, i couldn't pass it up.

yep.......cheers!

5.0Droptop · Dec 19, 2003

timk how do you like the steeda cam you got?

tmoss · Dec 19, 2003

timk said:
Someguy80 said:

LMAO these threads are great. Hi Ed

hey, if anyone cares, i'm getting the car dyno'd in the morning tomorrow. you guys can check it, make fun of me, applaud me, or whatever you want. the car is untuned, but i don't have the money, so curiosity got the most of me. local dyno day is just so cheap, i couldn't pass it up.

yep.......cheers!

Click to expand...

Hey Tim, next spring if this dyno day comes up again let me know - I'll have my new engine combo together then and I'll join you guys. I don't visit the chat sections much where this stuff comes up for notice.

5.0Droptop · Dec 19, 2003

Greg, I have Thumpers heads with a cobra intake a mild comp cam nx264hr. It is a great street car occasional track for fun. A solid 13's car, The numbers below are with Tmoss lower stock upper.....If you do decide to go with Mikes aka Thumper460 heads You will not be disappointed. I am sure Ed will tell you not to buy Thumpers heads that it is a waste of money... but I would never say that. I have had no business dealings with Ed in the past but I am certian that he will guide you in the right direction to meet your goals no matter what heads you get. Good luck Bro.

5.0Droptop · Dec 19, 2003

tmoss said:
Hey Tim, next spring if this dyno day comes up again let me know - I'll have my new engine combo together then and I'll join you guys. I don't visit the chat sections much where this stuff comes up for notice.

Meee toooo..If its near Where you live Tom Maybe I can show up too.

retro50 · Dec 19, 2003

I know the guy in R.I. He didn't sell his car with the Thumper heads because he was disappointed. He sold it because he is in college and he needed a truck for work. The car went pretty good I know he went 103 in the quarter and ran 13.7's. With better driving it could of went low 13's with that M.P.H. The kid didn't have any track experience at all. As far as using ported stock heads There is nothing wrong with them for an everyday driver. I have a set on my car and it runs 13.40's at 104 M.P.H.on a completely stock suspension With no traction aids whatsoever.I also drive this car 400 miles a week. Every week of the year. I've seen the Power heads personally and the quality is not that bad at all. Everything is brand new except for the head castings themselves.Altough I don't know who makes the parts they install in them. But then again most of the major head companies don't tell you who makes the parts they put in there's either. I know Dart uses Manley and Comp Cams But who knows about everybody else. As far as Power heads go they use solid bronze valve guides,Stainless valves,Chromemoly retainers and keys,Positive type valveseals.And the set I have seen had single springs with no dampner. I forget what the spring pressures were but I remember that they were more geared for a flat tappet cam as far as the pressure goes. If you do go for the power heads ask if they have stiffer springs available for a roller cam. Alot of these head companies have to skimp on something in one way or another so they can compete with each other unfortunately it is in the parts they install in them.Good luck with whatever you choose.

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