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I dont plan on doing either of these, but what would happen if you installed an aftermarket cam and 1.9 ratio roller rockers??? I understand there are different cams with higher lift/duration (i think Im using the terms right). Do you run the risk of slapping valves, or are there other negative effects???
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1997 Chevrolet Camaro
L26, Pacesetter headers, SLP cai, Centerforce DF clutch, Pro 5.0 shifter, UMI short stick, 1le driveline, J&M 35mm front swaybar, UMI lca's/phb/sfc's, KYB AGX shocks, Hotchkis stb. -
Re: quick q about cam/rockers
too much lift
you wouldnt be physically able to do it
there's no point in running high ration rockers with a cam. An after market cam gives you LSA, higher valve lift, and longer duration. ( how long the valves stay open). High ration rockers only give higher lift. So there really wouldnt be any point in running 1.9 rockers with a cam any way. You would just buy a cam that already had the extra lift built into itLast edited by Meatyshells; 08-30-2009, 06:15 PM.
Abbott long tubes,homemade true duals,slp ram air,whisper lid,eibach springs,kyb shocks,BMR subframe connectors, BMR LCA reloc brackets,BMR LCAs. T-top/manual converted -
Re: quick q about cam/rockers
Is anyone running the yella terra 1.95 ratio rockers?1997 Chevrolet Camaro
L26, Pacesetter headers, SLP cai, Centerforce DF clutch, Pro 5.0 shifter, UMI short stick, 1le driveline, J&M 35mm front swaybar, UMI lca's/phb/sfc's, KYB AGX shocks, Hotchkis stb.Comment
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Re: quick q about cam/rockers
don't think so...if you did head work and you cut your valve guides down to accept .600 lift, then you could run a 1.8 or 1.85 roller rocker on the ARH cam...depends on the cam.
Basically it's the cam lift x the rocker arm ratio = actual valve lift.
so for example, the abbott racing cam is .320 lift x 1.6 stock rockers = .512 lift.
so if you wanted to buy that cam and maybe later switch to a roller rocker with maybe a 1.8 or 1.85 ratio you would be looking at .576 - .592 lift.
I may run a 1.8 roller rocker with my cam down the road...give me the benefit of a roller rocker, and added lift on my cam. I still need to research into that though, I may be better off just going with a different cam all together.
the benefit I can see of running rockers with a cam, is you can play with your lift, without digging back through the whole engine to swap the cam. Makes life a little easier, plus if you get the aluminum rockers you are lightening up the valvetrain.Last edited by LETZRIDE; 05-04-2010, 12:40 AM.
2002 SOM Z28 Camaro - 12.9 @ 104 mph
1996 3800 Camaro - 13.43 @ 100.77 mph
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Re: quick q about cam/rockers
1.9's, especially with a cam put alot of stress on the rocker bolts. You risk snapping a bolt over time.
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