valve clearance
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Joined: Mar 2005
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From: saginaw michigan
valve clearance
i looking into getting a new camshaft and was wondering whats the biggest lift and duration i can get into a 1991 5.0 without smashing the valves into the pistons any help would be great
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
Piston-to-valve clearnce isn't really the problem. You need to get a cam that is Speed Density-friendly. (Unless you've converted to Mass Air.) There are a few choices, and if you look around you'll several other threads on this subject. There's quite a bit of info on that subject in this thread:
https://www.ford-trucks.com/forums/s...d.php?t=396279
You need to look at cams that are really designed for a truck engine, and the RPM range that truck operates at. A cam that's made for a car and designed to give you your Tq. and HP in the upper part of the RPM range isn't really going to be satisfactory in a heavy truck that needs its Tq. to come in at a lower RPM.
https://www.ford-trucks.com/forums/s...d.php?t=396279
You need to look at cams that are really designed for a truck engine, and the RPM range that truck operates at. A cam that's made for a car and designed to give you your Tq. and HP in the upper part of the RPM range isn't really going to be satisfactory in a heavy truck that needs its Tq. to come in at a lower RPM.
Last edited by TigerDan; Aug 6, 2005 at 12:39 PM.
