roller cam pushrods

[s15stroker500hp]

im looking at changing the cam in one of my motors from a solid cam to a roller hydralic cam with lunati retro fit roller lifters now i am curious what i should order for pushrods to go with this new cam, obviosly i cant use the same pushrods,

[muk]

i use comp cams magnum push rods

[s15stroker500hp]

What length

[coppergmc]

7.290" Give or take, depending on a couple of other things. That should do it though. Unless you have had a lot cut off the deck or heads. Also may be different for what ever kind of rockers you are running. Lunati sells the pushrods if you want to stay loyal with that brand.

[s15stroker500hp]

im not brand loyal, can go with any brand, my rockers are scorpion roller rockers and afr aluminum heads, stock deck height,

[Ryoung68]

The best would be to use a push rod length checker and order the correct pushrods for you combination. They are fairly cheap.

[s15stroker500hp]

ya that sounds like the best idea, rather than guessin and gettin the wrong rods

[inou2]

Ryoung's got the right advice. The checker is cheaper than the potential damage.

[Bakas]

You should always measure with an adjustable pushrod, dont assume anything. Aftermarket camshafts, lifters, rockers, valve springs could change the length. The key is to make sure there is a wear mark in the center of the valve stem when your all finished. Make sure you buy mock up valve springs otherwise you'll collapse the adjustable pushrod. I like to color the valve stem with a sharpie, rotate the motor and look for a centered wear mark.

check this out

http://www.compcams.com/information/Products/Pushrods/

http://www.carcraft.com/techarticles/116_0401_setting_pushrod_length/index.html

[spacecadet]

Heres what I use to check lenght:

http://cgi.ebay.com/ebaymotors/NEW-Comp-Cams-Push-Rod-Length-Checker-PN-7901-1_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQh ashZitem27a6015890QQitemZ170288830608QQptZMotorsQ5 fAutomotiveQ5fTools

http://cgi.ebay.com/ebaymotors/CHEVY-PUSH-ROD-LENGTH-CHECKER-SB-3-8-STUD-PROFORM_W0QQcmdZViewItemQQ_trkparmsZ66Q3a2Q7c65Q3a 1Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1Q7c294Q 3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem3a4e1be16 eQQitemZ250418553198QQptZMotorsQ5fAutomotiveQ5fToo ls

[Scotty_S-15]

You should always measure with an adjustable pushrod, dont assume anything.
That's what I was thinking. Dial in the length using an adjustable pushrod and the checker. Or, with the ajustable rod, check the pattern on the valve stem tip, but that can be tricky with hydraulic lifters. (can't be collapsed)
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