Thumper E7's Are they worth it??

[black95gts5.0]

OK I want to put a full 2.5in exhaust, an intake manifold set and 3.55 gears, I have CAI + 70mm TB already. If I go with Thumper's E7 head set with a B cam and the timing chain set for $895.00. use stock rockers, pushrods and so on can I expect to see some substancial gains? Would like to see 270 to 300 @ wheels to give those pesky LT+S1's a good run (in the quarter not top end) and even hold with an 05 mustang. Am I shooting too high, also want to keep some mileage I drive a lot on the highway.

 

[CManT1914]

Would like to see 270 to 300 @ wheels

I'm not familiar with Thumper E7's, I'm assuming they're just E7's that have been ported? Sorry, but you won't be close to 300 with those heads. But 270 I would imagine to be doable. Might wanna consider a slightly more aggresive cam to get there too. An 05 GT is easy to kill, especially with 270rwhp. They weigh more than us, and I am really unimpressed with their performance. LS1's are monsters, good luck trying to chase those fockers down. I still have trouble with them from time to time.

 

[blksn955.o]

The B cam is kinda dated with the off the shelf cams out there now...it should with that combo be at ohh 240-260rwhp un-tuned...I would sug. a ported stock lower (tmoss comes to mind) with those heads bang for the buck it would be a fun car, and also look at a diff. cam like the steeda 19 or such that works nice with the 94-95 eec.

I have thumper ported gt40's they are nice, the turnaround is fast and the work is of great quality. The price to get them ported alone is worth it compared to "a basic tank/vavle job/mill job", now compared to alum. heads (yes this ALWAYS gets brought up) well there apples to banana's , but for a budget build to get some good power/have some fun and be quicker not a bad deal at all.

Say the ported E7's flow alittle bit better than box stock gt40's (from the port size after and such I would say they should flow better), Before thumper ported my gt40's aka box stock, with a tfs1 cam, and a tmoss ported stock lower with no tune I went 13.5 @102 with a bad 2.4-ish 60ft. un-tuned I dont see why you could not do this and alittle better with the same bad 60ft and a sim. combo.

 

[RIO5.0]

I run those heads...I pd 500.00 for just the heads, added a Steeda 19 and I run 93 Cobra Fox set-up...i'm 302 FWHP with all my mods....For about the same amount of money spent I picked up 80 FWHP...not to shabby...If your on a budget, they work...I run 373s and can still hit 19-20 around town if I drive it nice...but mostly I dont....Mines not a DD so I enjoy it when its out...
I have run my Neices 95 Z28 at the drags, its got exhaust and its chipped...it'll hang right with her....Depends on who gets outta the hole first..she takes me, I take her...So it runs ok, you shouldn't get spanked to hard... Although those Z's do screw up top...come 3rd gear they really start to pour it on...

I know you can get alot of parts for 895.00...I would go the heads alone from Mike, then hit the Corral classifieds rounding up stuff...Timing sets can be had cheap...B cams are all over the place...that'll leave you a few bucks for a AFPR, gasket sets and other minor BS stuff...

 

[final5-0]

I just gotta think you can do better than that old outdated b cam.

Never the less, most combos like you describe will be in the 245 to 275 rwhp range.

I'd search out all of the combos that are based on your head choice and see which cam those combos are using that have hp/tq curves that satisfy your desires.

btw ...... I'd go on up to 373's because at highway speeds, you'll only turn a hair over 100 more rpm with them as opposed to the 355's.

Grady

 

[mo_dingo]

Definately go w/ a e303 or tfs stage one if you want your powerband to run up to 5500 or 6k.
Scott

 

[BlackVert]

i have the cheaper version of the thumpers and i am happy with them. i may do a before and after dyno for the kenne bell. if i do, i'll post up the numbers.

 

[thumper460]

Cool...!!

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

Thumper

 

[black95gts5.0]

Well that helps to give me a better idea what to do. I just like the idea of opening my hood and seeing stock heads and intake's (ported lower), and being able to run an 05 or scare an LS1, maybee burn LT1's seems pretty awesome.

 

[black95gts5.0]

oh and one more question, if I put a Trick Flow Stage One camshaft w/.499 + .510 lift do I have to worry about valve clearance with ported E7's??

 

[blksn955.o]

shouldnt but you may want to look into a spring upgrade.

 

[BlackVert]

oh and one more question, if I put a Trick Flow Stage One camshaft w/.499 + .510 lift do I have to worry about valve clearance with ported E7's??

he has different valve spring options. mine are "good" only to .500, but others were ok with higher lift cams.

 

[black95gts5.0]

Cool sounds good, oh will I have to worry about piston to valve clearance at that much lift?? Thanks

 

[BlackVert]

Cool sounds good, oh will I have to worry about piston to valve clearance at that much lift?? Thanks

i don't know, but i believe that thumper (mike?) has done enough of these that he should be able to tell you with 100% certainty if that would be a concern or not.

 

[CManT1914]

Cool sounds good, oh will I have to worry about piston to valve clearance at that much lift?? Thanks

You should'nt have to worry about PTV clearance running the stage 1 cam. I (along with a few other guys) have 1.7's on mine, and I have no problems.

 

[thumper460]

You should have no problem with the TFS1 cam !! I would even install the cam in 4* advanced ( 108 ICL to 104 ICL) to really bump up the low end torque, and still pull HARD thru the entire RPM range!!

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

Thumper

 

[sldghmr]

OK I want to put a full 2.5in exhaust, an intake manifold set and 3.55 gears, I have CAI + 70mm TB already. If I go with Thumper's E7 head set with a B cam and the timing chain set for $895.00. use stock rockers, pushrods and so on can I expect to see some substancial gains? Would like to see 270 to 300 @ wheels to give those pesky LT+S1's a good run (in the quarter not top end) and even hold with an 05 mustang. Am I shooting too high, also want to keep some mileage I drive a lot on the highway.

I'm going to be honest with you. Frankly, I am elated w/the combo. With everything that you stated (MINUS the 70mm TB), I went 13.13 @ 104.1. Yes it was in great air, and at a track close to sea level, but I'm still pushing (barely) thru the stock injectors, stock TB, stock shifter (rubbery is an overstatement!!) and on a non-drag oriented(sp?) suspension. Oh yeah, and I too have 3.55's (trust me go w/the 3.73's). I'm hard headed, so I'm not listening to my friends that say just put 3.73's in (and get that 12.xx), or, just get smaller tires (26" vs. the 28" monsters that kill my gear), or drop the sway bar (hmmmm, well, ok). I know 104.1mph will put me in the 12's, I just gotta drive it there. Oh yeah car weighs 3450 w/out my 200lb butt in the seat...

I dynoed car twice now. 1st time was 257. Couple of months later, dynoed at 262. Two different dyno houses both were dynojet 248c's. Hope this helps.

 

[Allmotor95]

Let's see, from experience, not a guess, I can tell you you'll make thye same or more power with GT40's or P's than with fully ported E7's. You can pick those up for about half the price and that will leave you enough money for springs, retainers, cam and timing chain. It will also look stock.

Nonetheless, you can go to classifieds in, dare I say it, Corral and pick up a set of Brand New Twisted Wedge's for $950 shipped and make about 50HP more and laugh at LS1's.

Like I said, is just my personal experience. READ Sig.

BTW I would go with Trickflow stage 2 cam, it should clear, but always check!!!

 

[thumper460]

Post Stangnet Aug 2004
True cost of head work VS buying Ported E7s that OUT flow the GT40s series heads..

****"But since the truth about the work is "out" I have $400 for purchase of heads, 5angle valve job/.035mill/comp springs/tank/checked/and a rethread in a exh. boss totaled around $550 so there was $950ish in the UNported stock heads. "**** ( 400.00 heads and 550.00 for machine work)
That is $950.00 for " Unported stock heads",!!


Yet there are a lot of GOOD deals out there.. always shop befor you buy!! Cool?? The 3 bars on the 40s will give them away along with the GT showing... always get and go for the BEST deal to get where your performance needs are!! But some times the BOLT on USED heads need a few more dollars to make them work right.. cool??

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

Thumper

 

[blksn955.o]

100% true...thumper, I cannot thank you enough.

A buddy home ported his stock e7's before I had mine ported. The exh. was the same size but had a better port, less restriction, and they smoothed the bowl area, the intake was the same size port wise also as the gt40 after porting...with a valve job and springs there is no reason ported e7's by someone who knows how to port (or even someone who is willing to do it themselvs) to flow more than BOX STOCK gt40 heads.

That is the argument often brought up...trust me I am the one in that quote thumper posted. If your going to get heads it is smart to get them checked, valve job, springs checked, milled, and tanked anyway so if you do pick up 950$ alum heads smart money is still about 200-500 off from having them set up properly to make sure they are perfect depending on needs of the heads. Can you run used alum. heads straight off one car and to another...YES, however, smart money is always in getting things fresh. Also like said ported e7's are not the same comparison to aftermarket Alum. heads..different goals and budgets go along with those type of builds.

If you have gt40s laying around...send them to thumper then your looking at a stock head that should (I am sorting/shaking down my combo still) be able to play with those alum. head guys....and there a factory stock head...that just geeks me out.