GT40P Combos

GT Drifter

New Member

Mar 26, 2003

386

0

0

Ontario, Canada

Oct 1, 2007

#1

• Oct 1, 2007

• #1

So I've heard talk of the GT40P (Explorer head combos) around hear a lot. People like 25thmustang talking about running 12s on such a set up.

I wanted to create this thread to find out what components one would need to make this combo work.
Obviously heads, intake, cam and full exhaust system.

 

R

rocknrod

New Member

Jun 14, 2007

13

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0

va

Oct 1, 2007

#2

• Oct 1, 2007

• #2

thats about it

just what you said

 

GT Drifter

New Member

Mar 26, 2003

386

0

0

Ontario, Canada

Oct 1, 2007

#3

• Oct 1, 2007

• #3

So, here's what I've come up with:
GT40P Heads, port and polished
1.7 RRs
70mm T-Body
GT40 Intake
Crower 15321 Cam (282* intake/288* exhaust, power from 2200-6000rpm)
BBK Headers, Xpipe and some mufflers.

Opinions on the cam?
Any other supporting mods? MAF, fuel stuff, etc.

 

GT Drifter

New Member

Mar 26, 2003

386

0

0

Ontario, Canada

Oct 2, 2007

#4

• Oct 2, 2007

• #4

Bump..

 

Fast63

New Member

Sep 20, 2007

717

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0

Oct 2, 2007

#5

• Oct 2, 2007

• #5

my opinion, use a smaller cam, like the E-303, or F-303, and use the stock throttle body to avoid any driveability issues. I kinda doubt a bigger throttle body will help you enough to justify it. Also, I would use 1.6 RR's to avoid any valve geometry problems, such as the pushrods rubbing on the head casting, unless you are sure your pushrods will clear, then i would recommend the 1.7

 

leroy93lx

Member

Jun 24, 2007

29

2

9

Indiana

Oct 3, 2007

#6

• Oct 3, 2007

• #6

We run Tristate cylinder heads gt40p's which have 1.90 1.60s and a valve job with an explorer upper and lower, modified explorer 65mm throttle body, an anderson n-21 cam with 1.7 roller rockers, 70mm cobra mass air, 24s, kirban regulator, .375 intake spacer, on a stock bottom end for years. Its very reliable and has awesome power. Been used as a daily 110 mile commuter for 5 years. 200,000 plus miles and still runs mid 12s.