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  '79 to '93 -- The Fox Mustang & Capri
  GT40P Longblock

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Author Topic:   GT40P Longblock

Posts: 106
From: Tucson, AZ
Registered: Feb 2000

posted 11-02-2000 04:29 PM     Click Here to See the Profile for Boss66   Click Here to Email Boss66     Edit/Delete Message   Reply w/Quote
What would you all suggest a person do to get some more power from the GT40P longblock that is only rated for 215hp? How much lift are those heads set up to handle.

Later Boss66

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Pit Boss

Posts: 590
From: Auburn, AL.
Registered: Jan 2000

posted 11-02-2000 04:44 PM     Click Here to See the Profile for cpmaverick   Click Here to Email cpmaverick     Edit/Delete Message   Reply w/Quote
The GT40 Longblock is basically a 85-95 Mustang 5.0L with GT40P heads, all mods for those engines apply.. The pistons are cast (hyper-whatever ) and the cam is roller, I don't know if the rocker arms are 1.7 or 1.6 (the Cobras were 1.7 but I don't know about the explorers, which use the GT40P heads). I'd put a B303 or E303 cam with 1.7 rockers if it doesn't have 'em already.

-Charlie Ping
1970 Maverick Grabber
-1987 5.0L B303 roller cam/rockers
-1968 Mustang Toploader
-1977 Lincoln Versailles 9 inch w/discs
-1980 Granada Front Discs

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Posts: 178
From: Saskatoon, Saskatchewan, Canada.
Registered: Oct 2000

posted 11-07-2000 11:24 AM     Click Here to See the Profile for ragtopjr   Click Here to Email ragtopjr     Edit/Delete Message   Reply w/Quote
Give shaun an email he has a lot of experience with the gt40p heads and can probaly help you a lot.

1984 5.0L LX Conv 3600 lbs 13.41 at 101.89 SIR

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Pit Boss

Posts: 918
From: Lyons, ILL, USA
Registered: May 99

posted 11-07-2000 10:22 PM     Click Here to See the Profile for Capri   Click Here to Email Capri     Edit/Delete Message   Reply w/Quote
You can do just about anything in the world with that combination, just like a regular 5.0 motor. Im sure you got the piston to valve clearence specs when you bought the thing. You can go larger on the cam, and add the rest of the goodies too. Its a pretty stout bullet as it is right out of the crate.


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