[MichaelPal]

this might be an odd question, i've searched the forum and haven't found any form of discussion on this topic.

planning to install aftermarket cams in my ls/vtec. what im mostly paying attention to is the lift and duration #'s.....stock GSR lift is around 10.6mm. the lift i'm looking for is around 11.2-11.8mm approximataly. and never revving the engine past ~8000rpm.

many companies say that you can use the lower stages of cams ( stage one, spec A...etc...) without upgrade of the valve springs and using thr stock valve train.

my question is, does anyone have any info on what is a safe lift on the cams before i have to start worrying about "floating" at high RPM's.

 

[Snoopy]

just upgrade to aftermarket for piece of mind. even if they say you can use stock valvetrain.

 

[-=Zeqs=-]

Exactly. The cost of springs and retainers do not cost more than losing the entire engine. Most of those stage 1 cams recommend you use at least the ITR valvetrain anyways if you're going to go OE.