more power
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Senior User
Joined: Nov 2006
Posts: 204
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more power
Hi all got a 91 f-150 with a STOCK 302,auto,4wd, short box, 3.55 gears. I so far have gotten a 5-speed and all the goodies to convert. 4 inch rancho lift, and a new set of 4.88 gears. any hints to make more power. I havent't put all these goodies on yet, I'd like to do it all a once. I don't mind spending money but not as much as they want for a supercharger. Not looking for a hot rod, just something that will pull the boat, bike trailer etc. Also the engine runs great with no problems. thanks for any hints.
Postmaster
Joined: Jul 2006
Posts: 3,978
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From: Central PA
Well the norm is 4:10 for 33"-35 tires in my area "mountainous " (what looks nice with 4" lift ) So the 4:88 will liven up the truck and with 5 sd you can put rpms any where you want them. Good luckI had same truck in 89 form new.
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
Elder User
Joined: Oct 2006
Posts: 843
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From: Redmond, WA
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Posting Guru
Joined: Jan 2006
Posts: 1,263
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From: The dark carnival
My question would be why the lift and those gears??? The lift seems useless especially considering your use (towing the boat) and you would probably be better off with stock tires and stock gears.
As far as power, in addition to what has already been said I would say a MAS conversion (may be NEEDED anyways), e-fan conversion, power steering removal (removal of fan + power steering makes a big difference), aluminum driveline conversion (if you don't already have them) and MSD ingnition.
As far as power, in addition to what has already been said I would say a MAS conversion (may be NEEDED anyways), e-fan conversion, power steering removal (removal of fan + power steering makes a big difference), aluminum driveline conversion (if you don't already have them) and MSD ingnition.
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Fleet Mechanic
Joined: Aug 2007
Posts: 1,836
Likes: 261
From: Piney Woods of East Texas
1 Exhaust, cam, computer chip, fuel delivery.
Hooker Pro Comp are nice, Thermal coating, inside and out. They use the newer band clamp for pipe connections, this way you don't have do deal with the triangle flange connections, that seam to leak.
Hooker Pro Comp are nice, Thermal coating, inside and out. They use the newer band clamp for pipe connections, this way you don't have do deal with the triangle flange connections, that seam to leak.
Senior User
Joined: Aug 2007
Posts: 388
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From: CANADA
Im going to try hedman elite. what attracts me is extra thick flange, standard thermal coating as well as thicker tubing than most (14 gauge). I think they come in two styles stock replacments (shortys -emissions compatible) and longer tubes (non-emission no O2) shortys arent worth much gain I hear.
Elder User
Joined: Oct 2006
Posts: 843
Likes: 1
From: Redmond, WA
Originally Posted by BEWOLD
shortys arent worth much gain I hear.
Fleet Mechanic
Joined: Aug 2007
Posts: 1,836
Likes: 261
From: Piney Woods of East Texas
Tube heaters have a weld bead that makes the seal against the heads. If this does not contact the head the gasket will blow out. The bead is used to increase surface pressure to the heads. Went through several gaskets till I figured what was happening. Then I welded a secondary bead to prevent blowout. I have yet to see a tube header that does not use this configuration. Even though a heavy flange ground flat should seal just like the factory manifold.
I only use long tube headers. If you have a eec it requries a input form the O2 sensor. With it just hanging loose (connected or not) you will loose performace.
I only use long tube headers. If you have a eec it requries a input form the O2 sensor. With it just hanging loose (connected or not) you will loose performace.
Last edited by blue68f100; Aug 20, 2007 at 12:51 PM.