can i make 300whp with gt-40 heads?

Daniel50

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Mar 30, 2005

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Discovery Bay, CA

Aug 16, 2005

#1

• Aug 16, 2005

• #1

well my h/c/i is next. but i dont have a ton of money so i am doing a budget h/c/i. but i want around 300whp. I have all the supporting mods so far. they are in my signature. my question is with gt-40 heads, e-cam, and cobra intake can i make around 300 whp? which gt-40 heads will do this? port and polish?

 

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bcd

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Jun 23, 2005

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arab al

Aug 16, 2005

#2

• Aug 16, 2005

• #2

They should. depends on the port job. if you have someone who does good port work there is no reason it shouldn't. someone told me tri state cylinder head was selling gt40 p heads for 450 new. you might want to check that out. you will need mac long tube headers or another p compatible header to run them though

 

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bcd

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arab al

Aug 16, 2005

#3

• Aug 16, 2005

• #3

you did mean the iron heads didn't you

 

Daniel50

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#4

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either irons or aluminum i looking to spend around 600 on heads. used is fine. i have ford racing headers. they fit all gt-40 heads

 

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igotyofire

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Feb 26, 2004

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Aug 16, 2005

#5

• Aug 16, 2005

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killer95stang i belive his name and he made 300rwhp on gt40p's

 

txstang84

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May 21, 2005

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#6

• Aug 16, 2005

• #6

i thought you had to have special headers specifically for the "p" heads due to the spark plug angles...

 

bubba-dough

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Dec 28, 2004

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Indiana

Aug 16, 2005

#7

• Aug 16, 2005

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Yes they need special headers. His sig shows Ford Racing headers. Ford only makes 2 shorty headers. But I think they both work with "p" heads. The FMS-M-9430-P50 are the ones I have, the other ones are ceramic coated and are quite a bit more in price. I bought my GT40P heads from Tri State Cylinder Head in Evansville Indiana. $450 a pair. New castings and new parts. .600 lift springs and a 5 angle valve job. So to answer the original question I would go with the "P" heads.

 

Daniel50

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#8

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sounds good. i think i will go with the p heads. are porting these heads worth it? and does tri state cylinder head have a online ordering?

 

bubba-dough

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Dec 28, 2004

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Indiana

Aug 16, 2005

#9

• Aug 16, 2005

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They have a website www.tristatecylinderhead.com but they don't list the GT40P head and they don't have online ordering. I called them on a Monday and got them the next Monday. But I also only live 2 1/2 hrs up the highway from them. I had them delivered to my door for $504 and that was with sales tax because I live in the same state as them. They build them when you order.
Here is their contact info:
1-800-270-0095 or jimdaly@tristatecylinderhead.com

 

Daniel50

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#10

• Aug 16, 2005

• #10

thanks for the info i think ill pick up a set of these.

 

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bcd

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Jun 23, 2005

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arab al

Aug 16, 2005

#11

• Aug 16, 2005

• #11

have them ported. they respond well stang pro has a big article about them. think its stangpro.com

 

QDRHRSE

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Aug 16, 2005

#12

• Aug 16, 2005

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300rwhp with GT40 heads, ecam, and cobra intake....I don't know about that....I don't doubt 300fwhp though. 300hp at the wheels is pretty big number for stock compression and GT40 heads. That combo is good for low 12's with the right set up though.

 

Cobra1894

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Broken Arrow, OK

Aug 16, 2005

#13

• Aug 16, 2005

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can you give a little more detail where on stangpro.com the GT40 article is?

 

25thmustang

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Sep 5, 2003

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Montgomery, NY

Aug 16, 2005

#14

• Aug 16, 2005

• #14

I have seen enough 280-300 rwhp GT40P, stock cam, Cobra intake cars to say with the right port job, well over 300 rwhp is attainable. Port them, valve job, and mill them, will cost a bit but will net you the 300+ hp on a healthy motor!

 

Daniel50

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Aug 17, 2005

#15

• Aug 17, 2005

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yeah a good port job is for sure. what should i mill them to?

 

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emagdnim

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Feb 5, 2003

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Aug 17, 2005

#16

• Aug 17, 2005

• #16

Lots of headers will fit on the P heads just it will be a pain to change the spark plugs you may have to pull the headers .

 

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cwdunnet

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toronto

Aug 17, 2005

#17

• Aug 17, 2005

• #17

i got 293 horse power..with stock block...stock cam..gt40 heads, cobra upper and lower intake..19lbs injectors, 65 mm throttle body..
so 300 is possible for sure

 

M

MarkFJ40

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Calgary, Alberta, Canada

Aug 17, 2005

#18

• Aug 17, 2005

• #18

cwdunnet said:

i got 293 horse power..with stock block...stock cam..gt40 heads, cobra upper and lower intake..19lbs injectors, 65 mm throttle body..
so 300 is possible for sure

Click to expand...

holy crap thats impressive numbers

 

notchback

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May 30, 2000

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St Clair Shores MI

Aug 17, 2005

#19

• Aug 17, 2005

• #19

QDRHRSE said:

300rwhp with GT40 heads, ecam, and cobra intake....I don't know about that....I don't doubt 300fwhp though. 300hp at the wheels is pretty big number for stock compression and GT40 heads. That combo is good for low 12's with the right set up though.

Click to expand...

wow i'm so confused by that.

of course you can do 300 w/ iron's , no problem at all

stay w/ the 40's not "p"'s

deck them to raise compression a little, port the exhaust and just have the intakes cleaned up , remove the "bump" and comp valve job

my buddy went 11.80 w/ box stock 40 intake and iron 40's ported like that and 125 shot.

and low 12's is 300 hp....so if it's good for low 12's...it's good for 300 hp

don't pay more than $300 for the heads , and the port work should run you $300-$450

 

M

mackey

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Jan 25, 2003

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Aug 17, 2005

#20

• Aug 17, 2005

• #20

For the price of the heads + the port job you are going to get done, you realize you can get a decent set of aluminum heads? Such as used trickflow or AFR.