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Author Topic:   Changes to FI motor
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Gearhead

Posts: 935
From: Lakewood, CO, USA
Registered: Jun 2001

posted 01-08-2006 01:18 PM     Click Here to See the Profile for JCQuinn@work   Click Here to Email JCQuinn@work     Edit/Delete Message   Reply w/Quote
I have an F250 Extra Duty 4X4 with the FI 460 and a 5 speed. One of the exhaust manifolds has cracked and makes a horrid noise and leakes gas into the cab.

Sooo I find myself with an excelent reason to put long tube headers and a better flowing exhaust.

My questions are:

1. Will the better exhaust upset the computer?

2. Any suggestions about brand? I don't want a drone at highway speeds.

3. Will putting a 70 timing set on the motor upset the computer?

4. Would a better flowing manifold and heads upset the computer?

AS you can tell I am afraid of upsetting the computer.

John

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SteveLaRiviere
Administrator

Posts: 45869
From: Saco, Maine
Registered: May 99

posted 01-08-2006 08:04 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
I believe that uses a speed density system, but I still think it won't have a problem, as long as you keep the oxygen sensor[s] hooked up.

------------------
'70 Mustang Mach 1 - '70 Mustang Convertible - '72 Mustang Sprint - '94 F-150 XL

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