Thumper E7's Are they worth it??

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.

Cool...!!

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

Thumper

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

black95gts5.0 said:

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??

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

black95gts5.0 said:

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

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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.

black95gts5.0 said:

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

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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.

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

black95gts5.0 said:

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.

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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.

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!!!

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

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.