making gt40 heads flow

schacher94gt · Nov 3, 2009

Just wondering what i could do to make the gt40 heads flow a little better than stock. i dont have a whole lot of cash being a college student but what could i do for in the 700-800 dollar range.
thanks alot
Alex

Win · Nov 3, 2009

you could sell the gt40's and add that plus the 700-800 and have aluminum heads.

Steven · Nov 3, 2009

Trickflow's for a thousand are dime a dozen, sometimes even less then that. GT40s= not worth the time anymore compared to the cheap used aluminum heads around anymore.

schacher94gt · Nov 4, 2009

i have thought about this but im starting to piece back my shortblock and figured itd take awhile to get the heads sold. thats why i ask if i could just do something w/ these since its just a DD. id rather not spend that much b/c i have to do a top this winter too so the range would be more like 500 and maybe a little more.
thanks
Alex

Steven · Nov 4, 2009

still. Your not going to see near the gains nor the power band of a set of 6-700 dollar trickflows.

LAFENATU · Nov 4, 2009

You can get a set of GT40's to flow very well but like Steven said, in the end it would be easier to just buy a set of used Edelbrock/TFS/AFR heads.

I have AFR's now but I have had 3 sets of GT40's on various Mustangs I have had and I like them a lot. They make about 25 over E7's and with portwork they flow paticularly well. Porting iron is expensive at shops because it is very tedious and time consuming vs. Aluminum.

I have a friend that ported my GT40's professionally. I can tell you everything needed to be done if you need.

schacher94gt · Nov 4, 2009

I was wondering b/c i have the eddy performer intake would i need to port my intake to match the heads even though it should be better than any intake that the gt40 heads came w/?
thanks
Alex

Win · Nov 4, 2009

I dunno what the Performer flows. I am sure it would take a good bit of port work to the GT40's to make it flow what the intake does. I just picked up a set of GT40P's and a Trickflow Stage 2 Cam the other day to start with my build.

LAFENATU · Nov 5, 2009

TFS 2 is too big.

LAFENATU · Nov 5, 2009

You don't have to port the heads to match the intake. It will be fine as is.

schacher94gt · Nov 5, 2009

Alright thanks alot i will probably just leave them untouched tho.

Alex

brad94GT · Nov 6, 2009

thumper performance can port e7s to flow more than out of the box gt40s for around 600 so im sure for about the same gt40s could flow decent. but if your going n/a i would go for aluminum heads

schacher94gt · Nov 6, 2009

Right now its just a car to get me around figured i dont need 400+hp since im only 20 and a termis in the pic in less than 2 years

Win · Nov 7, 2009

LAFENATU said:
TFS 2 is too big.

I do have the p's. They flow a little better then the regular gt40's. I have read around on quite a few places and gotten some pretty good reviews on it. Is there a certain reason you say it's to big or a certain lift or duration that you don't think will agree with the heads?

LAFENATU · Nov 7, 2009

The difference in GT40/GT40P is negligable. Your gonna end up having a problem with clearance with the TFS 2. There are a lot of cams you can use though that work well with those heads.

A lot of people use these:

Crane 2031
TFS Stage 1
Steeda 19
Anderson Ford Motorsport B31

Whatever you do, make sure you check for clearance either way. Also invest in an adjustable pushrod checker.

Win · Nov 7, 2009

LAFENATU said:
The difference in GT40/GT40P is negligable. Your gonna end up having a problem with clearance with the TFS 2. There are a lot of cams you can use though that work well with those heads.

A lot of people use these:

Crane 2031
TFS Stage 1
Steeda 19
Anderson Ford Motorsport B31

Whatever you do, make sure you check for clearance either way. Also invest in an adjustable pushrod checker.

Thanks for the heads up so it didn't slip past me. I appreciate it.

Yeah i would check it and if need be i would have to get notched pistons. I have heard that it works fine, but better to spend 35 bucks on a tool then to have a blown engine.

Steven · Nov 7, 2009

Paul, the TFS 2 really is TO big. It's that much bigger that unless you have atleast a 170cc runner I would not find it a viable choice in using it on your car. Your not pushing near enough air or cubic inches to make it worth while. I'd sell it and make money on it man.

Win · Nov 7, 2009

Steven said:
Paul, the TFS 2 really is TO big. It's that much bigger that unless you have atleast a 170cc runner I would not find it a viable choice in using it on your car. Your not pushing near enough air or cubic inches to make it worth while. I'd sell it and make money on it man.

It's Win remember

I guess i could sell it and find another cam I'll have to take some pics and throw it up for sale. Thanks guys