Push rod length

609 Views 2 Replies 3 Participants Last post by Art, Apr 5, 2001

pvirg

Discussion Starter · Apr 4, 2001

Is there any disadvantage to using longer push rods? The roller rockers I have seem to set to close to the stud nut and dont seem to be centered on the valve when put threw a full cycle. I went to a longer push rod and it seamed to fix both problems? This a Built 351 with tons of head work. I guess they just didnt get the push rods or studs quite on the money???
Thanks Paul
STILL WORKING ON THE PICS!!!!!!!!!

http://albums.photopoint.com/j/AlbumList?u=1606258

Save

1 - 3 of 3 Posts

camachinist

· #2 · Apr 4, 2001

Common racing mod...especially when going to a taller valve spring and valve to avoid coil bind with a high-lift cam...

Positioning the rocker as near to the CL of the valve stem throughout its travel is what you're looking for...

Sounds like you're on the right track...

Pat
http://albums.photopoint.com/j/View?u=1570936&a=11937754&p=42910787.jpg

Save

Art

· #3 · Apr 5, 2001

I have an old pushrod that I have cut in half, drilled, tapped both halves 1/4x20 and screwed a piece of all thread in the pushrod. I mock up the motor with Ford tractor inner valve springs (very light). I can adjust the length of the pushrod to suit the engine as Pat said to keep the roller centered over the valve. When I get it like I want it, I remove the pushrod and measure it.

Required tools for operating a Vintage Mustang:
1. Duct Tape
2. J.B. Weld
3. B.F.H. (Big Fat Hammer)
4. VINTAGE MUSTANG FORUMS II
View Album Here: http://albums.photopoint.com/j/AlbumIndex?u=1616948&a=12352157

Save

1 - 3 of 3 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top Contributors this Month