Pushrod length needed
Thread Starter
Pro
Joined: Sep 2007
Posts: 576
Likes: 2
From: Van Nuys Ca
Pushrod length needed
ok well went to fire my motor up again to adjust the valves and i get this!
my question is i have a decent size cam, 1.6 rockers and stock vortec heads. i need to know what length pushrods to get.
heres my cam specs
my question is i have a decent size cam, 1.6 rockers and stock vortec heads. i need to know what length pushrods to get.
heres my cam specs
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Buy a pushrod length checker and get the right size. I have a feeling the wrong size pushrods is not your problem. Looks like the valves weren't adjusted right, hopefully you didn't bend any.
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
Here are a couple of articals that outline how to correctly determine pushrod length/rocker geometry. The only thing these articals don't cover (becasue they are geared towards mech roller race car engines) is the fact with hyd lifters you have to use a very light "checker valve spring" or take a lifter apart and shim it up solid. If you don't, your pushrod measurements will be too long by about .060-.100" because of the plunger on the hyd lifter collasping when the cam lobes comes up. You shouldn't just subtract that amount from your measurements either because some hyd lifters have more travel in their plungers that others and your basically guessing... IMO if your going to guess -why go thru the trouble to measure it at all.
http://www.carcraft.com/techarticles...gth/index.html
http://www.circletrack.com/techartic...gth/index.html
These articals cover proper valve adjustment proceedure for an engine utilizing hyd lifters. It is commonly refered to as the E/O - I/C method (Exhaust Open - Intake Close). This is the proceedure I use.
http://paceperformance.com/index.asp...=Custom&ID=637
http://www.scorpionperformance.com/V...MadeSimple.pdf
I really hope you haven't hurt anything and get it back together correctly.
Will
http://www.carcraft.com/techarticles...gth/index.html
http://www.circletrack.com/techartic...gth/index.html
These articals cover proper valve adjustment proceedure for an engine utilizing hyd lifters. It is commonly refered to as the E/O - I/C method (Exhaust Open - Intake Close). This is the proceedure I use.
http://paceperformance.com/index.asp...=Custom&ID=637
http://www.scorpionperformance.com/V...MadeSimple.pdf
I really hope you haven't hurt anything and get it back together correctly.
Will
