what are thumpers?

Just a note, 96 Explorer heads are GT-40, but 97 and up are 'P' heads. I think in late 97 they don't have the EGR air injection ports. That may or may not affect emissions, since from what I've read the air injection is re-routed after the engin is hot, and you take emissions test with a hot engine.

Why pay $360+ for referb heads that you have to rebuild anyway? At the very least change the springs. I don't trust AZ, so I'd have the whole thing checked and maybe rebuilt. I don't think they would use old valves as long as they aren't "too far out of spec". FYI, I just picked up a 98 Mountaineer engine, without accessories for $250 on eBay. It has 'P' heads, Explorer type intake, and I got a block to rebuild. You can pick up 97-00 Explorer engines like this for $500 \wo core here in GA all day long. If you don't want 'P' heads I know a local yard that has a 96 explorer engine with old GT-40 iron for $600 \w a core.

My concept was to pick up a whole engine, pull the intake and use it, rebuild the heads, then put them on. Then finally to rebuild the short block when I need it. I think I'll save lots of cash this way.

Cool... I guess that the Ported head thing is in there again!! Guys... the GT40s are better than the E7s, stock to stock!! the heads being ported will increase the power of the heads... Ported GT40s are better than stock GT40s, right?? Buying a set of recon 40's or P's is better than having recon stock 7's right?? and then the delima.. Ported E7s will pull better than the stock 40s... SOooo... 360-420.00 for stock 40s that have been reconed is a good price... Or 500.00 for the whole freaking engine is a deal also, and then you pay more for the heads to be reconed.... stock or modified!! cool??

A guy had almost 900.00 in GT40s getting them the basic mods.. ( see stangnet) with out any flow work. SOooo... a good deal is only as good as you want it to be... And this autozone thing is a good place to start!! cool?? BUT.... in the statements above.." high dollar stock heads ", could be, IF you dont want the add'l power over the 40s and not want to run a iron head... But you really need to call the local performance machine shop and see what the 40s are going to cost to get them rocking ready!! and maybe a gasket match and performance valve job!! it might amaze ya!! cool??

Sorry it long...
Just me.........................

Thumper

thumper460 said:

Cool... I guess that the Ported head thing is in there again!! Guys... the GT40s are better than the E7s, stock to stock!! the heads being ported will increase the power of the heads... Ported GT40s are better than stock GT40s, right?? Buying a set of recon 40's or P's is better than having recon stock 7's right?? and then the delima.. Ported E7s will pull better than the stock 40s... SOooo... 360-420.00 for stock 40s that have been reconed is a good price... Or 500.00 for the whole freaking engine is a deal also, and then you pay more for the heads to be reconed.... stock or modified!! cool??

A guy had almost 900.00 in GT40s getting them the basic mods.. ( see stangnet) with out any flow work. SOooo... a good deal is only as good as you want it to be... And this autozone thing is a good place to start!! cool?? BUT.... in the statements above.." high dollar stock heads ", could be, IF you dont want the add'l power over the 40s and not want to run a iron head... But you really need to call the local performance machine shop and see what the 40s are going to cost to get them rocking ready!! and maybe a gasket match and performance valve job!! it might amaze ya!! cool??

Sorry it long...
Just me.........................

Thumper

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Man you talk fast or did I just read it fast.

How did this thread turn into another thumper vs the world pissing thread? Why cant people discuss thumper heads in a civil manner without having to bash them each and every time...

Steeda90GT said:

How did this thread turn into another thumper vs the world pissing thread? Why cant people discuss thumper heads in a civil manor without having to bash them each and every time...

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Eh? I thought things were going great and there's some good info being passed along here?

Steeda90GT said:

How did this thread turn into another thumper vs the world pissing thread? Why cant people discuss thumper heads in a civil manner without having to bash them each and every time...

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Probably the same reason people can't discuss AFR heads without bashing them.

Thread is pretty much been beaten to death anyhow. Oh well.

stunner6910 said:

i just called auto zone and they said they didn't carry them. i quote what i asked
" i'm looking for the gt40 heads for a cobra."

the guy " i would have to check to see if i can order them, what brand?"

me "ford"

the guy "i don't carry those"

me " ok bye"

the guy " ok bye"

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this is because you are not me

CUSTOMER LOOKINGH FOR GT40P:

"hello i want heads for a 97-1 explorer v8 or mercury mountaneer."

"Ok i can get those in 4 days"
you have to check every year.

CUSTOMER LOOKING FOR GT40s

"hello, i want heads for a 96 explorer 5.0 liter"

"k sir those are 3 days out for delivery"

if you are buying the heads out right, the core is like 80 bucks per head.

salvage companies carry the refurbished heads for 285 a piece. of course i would grab a trick flow valve train kit for any of these heads.

thumper460 said:

By the way my ported E7s will run around the P's... but that isnt the point!!

Thumper

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the jury is out on that.... hard to beat that low loift flow and velocity with the HIGHER compression

the key to the P head is a nice cam that fits.... perhaps i can show yall this.

yep... cant be too hard when these guys are doing it..

I wanted to tell you a buddy of mine bought a used set of your heads and put them on his stock bottom end car with a cobra intake and ecam and the basic bolt ons He busted off a 12.24 @ 112 mph on a 100 shot of nitrous he had a 1.81 60 ft Pretty good huh!! Cool HUH!!
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I run the ported E7's also and love them. It was a lot cheaper than buying expensive aluminum heads. My best ET before the heads,cam, and intake was a 13.6 at 108. Now day's it has so far been as fast as 12.24 at 113 and there is still more in it to go once I drive it harder at the strip. Still getting used to launching the new combo at the strip. Oh yeah that was with STOCK headers cause my Mac's were cracked in three places and had to junk them. _________________

The first pass of the day was a 12.58 @ 108 mph, the car seemed to boog a little out of the hole. The second and last pass was a 12.45 @ 108.4 on a 1.73 60 ft!! the heads and cam were unreal!! I droped almost a full second from before with the head change!! We are going out tonite and see what we can scare up....
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The car is my full weight (nothing removed except the front sway bar) daily driver with the a/c still on it. With no changes other than a set of 26x8 MT ET Drags, the car went 11.65 @ 115.8mph on the 175 shot (any other 60' time from the night would have given me an 11.5x) and 11.87 @ 115.8mph on the 150 shot. .
Overall, I'm pretty happy with 11s in my daily driven bolt-on car with Ported Thumper Heads !

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Yep, those were some of yours. Awsome heads I forgot about the markings untill you mentioned it. Ill be getting some of your heads when I get my car here from Texas. I sold the other car I had. It had your heads B-303 cam longtube mac headers performer rpm intake 650 double pumper complete off road exhaust. The biggest problem was getting the car to hook. spin through third. Cool though. with 3.73 gears.
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Vert 3750 # race weight with me and my junk. Mid 15's before and 13.93 after.( Im not a great driver either I had a 1.98 60ft ) Im still tuning and making changes. That was with Tmoss lower stock upper and a comp cam nx264hr !!
The fact is I pulled off 1.19 sec off my et and gained 9 mph by bolting on those parts. I just added a cobra intake and elec fan and sub connectors.I need a new clutch and Ill be running it again this spring.

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Up for sale is a set of thumper heads with approx. 9-10000 miles on them. they come upgraded with the dual vassco springs rated for .590 lift. These heads alone gave me .7 tenths in the 1/4 and 5 mph. If you want any additional info on these awesome heads for the $$$ go to www.thumperoforangepark

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I run Thumper Stg2s and a Tmoss Ported Explorer...They work..plain and simple...its cheap money and i like that..plus i like running Ford parts...i could have gone the other way, no problem...I just like the idea of banging 12s on ported stock parts...
The way i see it...i got a mild cam, the heads, and decent breathing mods...i got almost 300FWHP...not to shabby far as im concerned...thats about adding 80 HP over stock...thats a nice, noticable hit...

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You were right, the B cam, advanced 2 degrees on 1.7 RR's was the way to go. 1st of all the idol is mean, sounds much meaner than even bigger cams. I'm kind of getting sick of people always asking me "what's in that thing". 2nd of all low end tq is also good. Mine is a daily driver, can't afford too much bottom end loss. True, it's choppy under 1800rpm, but once after 2500rpm it's alive. I can do 2nd gear starts even on slight inclines w/o having to revv the engine more than normal. 3rd of all, top end, wow. Goes from 75 to 115 faster than most cars can go from 0 to 40.

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"unique" combo in and dyno'd
Well, it's a unique combo because my plan has had to change a few times due to things breaking. It's everything off of my old 302 swapped onto a shortblock.

The main parts of the setup are:

D.S.S. 331 stroker shortblock
"thumper" ported E-7 heads
Edelbrock performer RPM intake
Steeda #19 cam
24# injectors
190lph fuel pump
unequal length shorties
off-road H pipe
Flowmaster cat-back
dyno-tuned superchip from La'Roccas

The combo made 296.8 rwhp and 344 rwtq *******
( over 348 FWHP w/15% power train loss )


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1993 Mustang LX Coupe
Ex-Nebraska State Patrol car, "Thumper Performance" ported stock heads, B-303 cam, TFS Street heat intake,TNT Force 2 Wet nitrous kit, 3.55 gears, exhaust and all the usual bolt-ons.
12.80@106mph--motor
11.88@119mph--w/100 shot

** NEW COMBO **
347 Stroker, Thumper Heads, Keith Kraft custom grind cam, Vic. Jr. Intake with BG 750 speed demon, 2 speed PG with TCI group 6 stall, 3.73s.
11.83 N/A 115 mph

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I run 12.80 @ 106 with 1.77 60fts on drag radials. My local track is @ 3000 feet in the desert. Corrected for elevation, I'm some where in the 12.30's. My car is less than 3000lbs and has an electric fan, manual steering, K Member....4.10's and even more suspension junk. I run Thumpers with an e cam, 65 mm tb, 73mm mass air, and cobra intake. I think that with more tuning and a real slick I can drop another tenth or two. Simple combo, light weight, and matched parts all make for a pretty stout street car. I can drive anywhere as long as its not hot- no ac.


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Anyway I run a C4 2800 stall (a lowly 3.08 7.5 trac-loc from an '82 GT-cool factory slapper bars that work effectively), Stealth intake, B303 advanced 2 degrees, 1.7 roller rockers, 1 5/8 shorties. X pipe, and Hooker Aerochambers, and of course your heads.
Every gearhead that I run with (2.3 Turbo guy, 5.0 guy, big block Fairmont guy, '03 Cobra guy, and even my Chevy mechanic friend) all were impressed with this little ole' 5.0's all business like powerband.
Although I have not dynoed or dragged it, I have raced and beaten a Porsche Carrera 2 (drag not top speed...) and played with superbikes on clear I-States very effectively up to my self imposed top speed of 121 mph (5250 rpm @ 23.9" tire).
Nothing earth shatering but hey for what I have in this car- its tough to beat these humble efficient/light weight Fox body Fords and roller HO's with THUMPER E7 PORTED HEADS!



Just a few using my Ported Heads and having FUN doing it!!

Thumper

Ya Dude...Hey Mike...I hear you have some "Thumper" decals ???? Hook me up if you do....

Thanks...Im adding some 373's here soon and taking mine for another thrashing...

Alrighty, now lets be fair and let the AFR rep come in here and post a bunch of customer testimonials . Advertising in tech forum == .

Cool... decals are on the way..

Oh, I'm sorry I thought the post was " What are Thumpers ?" and keeping to the information and request of the guy who posted, We were trying to answer, but It didnt seem that it was keeping to the info, due to a few guys that just dont help!! cool?? I wont let my better self be exposed again, or just a few of the letters from a few of the guys running the heads...

Bottom line! E7s are good and no cost ( they are on there)!! GT40s are better and run from 360- 450.00, P's are better and cost about the same... (The AZ here in Jax will sell the P heads for 249.00 each, I guess less, if you know someone who works there ) Any port work on ANY of the heads will work better... Home Porting your own is cheap and will yeild good HP gains.. Porting professionally is more money ( as we know) and will yeild MORE power.. THE point to where the cost of the heads + the cost of port work = performance .. IS where you should draw the line and think of aftermarket heads, the best at this time, seem to be the AFR series. And that is "what are Thumpers " ( answering the question) !! Cool?? most of the rest is just BS anyway when it comes to the wallet, and the power you can get from it!! LOL Unless the guy is reading an old book.. then Thumper Is a rabbit.

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

Thumper

e7s arent free,
and with the right cam i would debate thumpers going faster than gt40P heads.

I can get trick flows for 100-200 more than thumpers any day of the week

ok, so as i understand gt40p and thumpers are relatively equal (with some saying that thumpers are better flowing that the gt40p but with that aside), how do the afr165s compare to these. They're like twice as much but killer is in the 12s with pretty much the basic bolt ons and an HCI swap... unless i'm missing something.

basically my question is, with a HCI swap using thumpers/gt40p get you the gains you would see using the afs165 or is it another "you get what you pay for" type thing where you will see improvements, but no 12 seconds

donjohn said:

ok, so as i understand gt40p and thumpers are relatively equal (with some saying that thumpers are better flowing that the gt40p but with that aside), how do the afr165s compare to these. They're like twice as much but killer is in the 12s with pretty much the basic bolt ons and an HCI swap... unless i'm missing something.

basically my question is, with a HCI swap using thumpers/gt40p get you the gains you would see using the afs165 or is it another "you get what you pay for" type thing where you will see improvements, but no 12 seconds

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Definitely get what you paid for. Thumpers and GT40s are in the end still "stockers" that have been improved upon. They are also heavy iron Gonna drop the money then you might as well get something aluminum with better flow numbers. Can someone second this or am I wrong?

JJ

If your Jonesing for cash or on a budget..then Mikes stuff is the balls...If you got the money or wanna wait...then sure, AFRs are tough to beat, period..dont think youll see anyone debate that...Just look at GTJAKES dyno....he made some super numbers...
Its all a matter of cash flow and what your plans for the car are...

donjohn said:

basically my question is, with a HCI swap using thumpers/gt40p get you the gains you would see using the afs165 or is it another "you get what you pay for" type thing where you will see improvements, but no 12 seconds

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What you get with a higher end setup like the AFR's is more overall power -- not just peak numbers. Killercanary makes less than 300 to the wheels, but his power under the curve is very good, combined with really good driving skills and he's deep in the 12's.

Dave

Sounds like KillerCanary got spanked by some Thumpers and now he's p*ssed about it! hehe

this is why we should never bring up the topic of Thumpers. I do give Thumper his street cred though, man can debate like a politician