thumper E7 vs GT40p

There's a fine line here....budget heads can rack up 700.00 before you know it....your in the used Alum market or close at those prices....I have Mikes E7s...i got a performance gain...thats what i was after and all I was willing to spend at the moment...Mike will do GT40s or E7s for the same ching....If I was doing it again, budget wise I'd locate a set of the GT40 and have Mike do em up...long as the heads are in working order you get new heads back as he replaces the seals, mills em flat and such.
I think the GT40s pull little more HP myself, least thats what I seen...
I seen some guys with Alums only go 270RWHP, so go figure??
Cobra intake and a nice cam and you'll be amazed at the dif....nice street car that'll run mid 13s...

Yeah I went with used ($100 each) iron GT40's and DIY port job myself. Halfway done with porting. Gonna get them milled, valve jobbed and new guides for another $200. So I'm figuring in the $500 range. I still say they're probably the best for a budget build.

I have a set of thumper's gt40's. The work is great.

I now run a ported gt40 lower on these heads.

Before they were ported I ran them until my shortblock had an n2o backfire and I lost some comp. (thought the ringland was dead but just the rings were done). Anywho I had a tmoss ported stock lower with my unported gt40's...let me tell you the port size and match was unbelievable. I dont think they could have been more perfect in size/shape port to port.

I think thumper brings the e7 preaty close to the gt40 family and want to say the intake port size would be preaty close to that of unported gt40 family head.

Preaty much you call on what you want to do, you can use your free stock heads and get them ported, I think thumpers work is like $550 (work on gt40 heads to get them fresh is not cheap...trust me I spent 400$ on the heads then $550 for springs valve job and mech. work to freshen them up before I even sent them to get ported) or get some used gt40 heads. In all honesty you will prob be preaty close power wise no matter what route you go.

My motto is, make sure you still have fun.... you cannot always be the fastest or have all the WOW gee wiz stuff...but above all enjoy your choice in the hobby.

blksn955.o said:

My motto is, make sure you still have fun.... you cannot always be the fastest or have all the WOW gee wiz stuff...but above all enjoy your choice in the hobby.

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That has to be the smartest comment I've read on here in a while. As long as you have fun builing it do it. I would opt for the gt40p heads myself my reasons, gt40p heads have a 60cc compared to stock 64cc more compression power. Gt40p heads also have a fast burn CC and out flow the stock for stock. So ported or stock the gt40p wins and you don't need to buy new headers the user "Urban(something)" has shown his trick to get around that.

Look into COSTs... Get a set for 200.00 and bolt on!! Killer!! get a set for 200.00 ( most are in the 400.00 range) then have then set up for performance.. valve job/ seals/ surfaced/springs.. and add that to the cost of the heads.... hmmmmmmm.. getting up there for STILL a set of stock GT40Ps !

Now throw in the port work/bowl work/performance valve job... Now those P's are ready to really rock!! but look at the costs.... hmmmmmmm ( again) !!

My E7s flow better than the 40s'.. but start with a BETTER head ( the 40's) and then the 40's are better and usually for the same price!! Budgets SUX!! Yep, been there all my live and the lives of my rides!! Keep it fun and make the BEST of what you have!!
blksn955.0 was there... cool??

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

Thumper

My advice is to just wait and save up for a better head. Most people on here will NOT sell you a decent set of GT40s for cheap. You will end up spending plenty of $$$ and by that time you will be in aluminum head territory...not worth it for a used rebuilt head.

Zero Signal said:

Yeah I went with used ($100 each) iron GT40's and DIY port job myself. Halfway done with porting. Gonna get them milled, valve jobbed and new guides for another $200. So I'm figuring in the $500 range. I still say they're probably the best for a budget build.

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I agree with you John

The smart thing to do with oem iron heads is to be careful and not put too much money in them so that when you want to step up to the next level with some better heads, you can get all of your money back you put in em

Good deals are out there ... you just gotta find em!

What I think doesn't make sense is to see someone put so much money in an oem iron head when for just a little bit more, they could have gone with an Aluminum head that flows better

Grady

personally i would just save up the $$ and just put it tward the 331

urban96 said:

personally i would just save up the $$ and just put it tward the 331

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Im in college now...third year actually. My original plan my freshmen year was to do a h/c/i that will give me the performance boost i was craving until i graduated when i could get a real job and build the motor the way i wanted which was 351 based. Well...i did the h/c/i...car had about 95k on the clock. Rode for a little while...BAM. Stock shortblock goes out on me. Dont know the cause...cant really tell. All i know is it blew its guts to pieces....literally. So then i say "hey, im gonna do a "Cheap" 351 swap and RE-DO it in 2 years when i graduate the way i want it which was stroked blah blah blah. So i do that. I drove it for a little. Then i go out one morning...car starts...stalls...wont start. Looks like the shortblock is the cause again. No physical damage but thats another story.



SO! The point is that if you CAN, wait(i know patience is a B*TCH), but wait until you have the money and do it right. You WILL end up spending more than you should have if you did it right the first time if you are just trying to "get by" until you can do it right. Now i realize that not everyone can do it the way they want the first time around...looking back i dont think i could have. But, atleast consider it. Being in college...dumping all that cash into it...getting it running again and then thinking you will be able to enjoy it. Then if it goes down again...well...you know the rest of that story.


Just write down your goals in your extra time for what you want. Then write down what you have the resources to do now. Then write down how long you would have to work to get the resources to do it the way you want it done. I WISH i did this and kept the car stock...and for an extra year built the 351 on the side taking my time. But the speed bug hit me and i wanted the power then and there. You live and learn.