Pushrod length problem
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Joined: Oct 2004
Posts: 628
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Pushrod length problem
I also posted this over in C4 Tech:
LT-1 with LT-4 Heads; RR; double springs; 7/16 Rocker studs
So the ideal length pushrod for my setup (as far as roller against valve tip is concerned) causes the rockers to slightly rub against the base of the rocker studs. This may explain why the original pushrods seemed too long; the builder may have just been a little lazy?
Any guidance from the gurus out there; should I grind .150" from the base of each stud or take the same from the base of each rocker arm?
Any other bright ideas?
Oh - and I have measured it about 4 times using checking pushrods and valve check springs - and I have been careful not to preload the lifters for the measurements.
Thanks!
LT-1 with LT-4 Heads; RR; double springs; 7/16 Rocker studs
So the ideal length pushrod for my setup (as far as roller against valve tip is concerned) causes the rockers to slightly rub against the base of the rocker studs. This may explain why the original pushrods seemed too long; the builder may have just been a little lazy?
Any guidance from the gurus out there; should I grind .150" from the base of each stud or take the same from the base of each rocker arm?
Any other bright ideas?
Oh - and I have measured it about 4 times using checking pushrods and valve check springs - and I have been careful not to preload the lifters for the measurements.
Thanks!
Melting Slicks
Joined: Jun 2002
Posts: 2,844
Likes: 99
From: Orrtanna Pa.
I don't have an LT-1,but did aftermarket heads (AFR 195's) and aluminum roller rockers with my solid flat tappet cam, Pushrod ended up .250 longer than stock to provide rocker body to stud clearance,and a good sweep on the valve stem. No grinding of anything,so if I decide to change something later on,I'm not stuck.
There's nothing wrong with pushrods that may be a bit long,but if you're short.........something WILL break.Just a matter of when.
There's nothing wrong with pushrods that may be a bit long,but if you're short.........something WILL break.Just a matter of when.
