valve train problem
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Junior User
Joined: Feb 2005
Posts: 84
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From: Waynesville,NC
valve train problem
I was reveiwing the tech articles here https://www.ford-trucks.com/article/...le_Secret.html
And i'm wondering if aftermarket heads will avoid this problem of valve preload. Engine rebuilding is new to me especially valvetrain components.
And i'm wondering if aftermarket heads will avoid this problem of valve preload. Engine rebuilding is new to me especially valvetrain components.
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
Aftermarket heads wont eliminate the problem ...but adjustable rockers will..So you can set each lifter to a certain preload regardless of push rod length's (within reason)
For instance you couldnt have 15 - 8" pushrods in there and then have one 7.750" long pushrod and expect the rocker to make up the differance...
Even if the adjuster would take up the slack..it would throw your valve train geometry off at the Valve tip...
Russ
For instance you couldnt have 15 - 8" pushrods in there and then have one 7.750" long pushrod and expect the rocker to make up the differance...
Even if the adjuster would take up the slack..it would throw your valve train geometry off at the Valve tip...
Russ
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
Well depending on your build ?? and the Cam that you choose to run..as long as it doesnt have over say .550" lift..the Stock for adjustable's will work just fine..
and Yes a flat tappet Hydraulic Cam is what you'll want to go with...Unless the motor you have is one of the few Hi-Po Factory motor's that had a Mechanical cam...which is unlikely...but anything is possible??
Edit: also make sure to use the Cam Maker's Recommended Valve springs..
Russ
and Yes a flat tappet Hydraulic Cam is what you'll want to go with...Unless the motor you have is one of the few Hi-Po Factory motor's that had a Mechanical cam...which is unlikely...but anything is possible??
Edit: also make sure to use the Cam Maker's Recommended Valve springs..
Russ
Last edited by RapidRuss; Jun 6, 2005 at 07:52 AM.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Hey, I'm running stock adjustables on my build, and I'm running a cam with .563" exhaust valve lift. Works great. Just had it up to 5000rpm's today (manually shifting). I think about .575" is the limit though.
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