divide the lift by 1.6 and then multiply by 1.7
so around .600/.609
you also get more duration but im not sure how to figure that out.
Roller rockers do nothing but magnify the lift from the cam, based on the ratio of the RR. A lot of times, cam lift is stated assuming a 1.6 ratio, but you have to read the fine print. Roller rockers do not increase the duration, but again, it gets kind of confusing. A cam's duration is typically measured from some amount of measurable lift (usually .050 IIRC), rather than the actual opening event (where the dwell period ends but before any lift has begun). So if the RR magnifies the lift, the cam gets to .050 lift sooner, which makes the duration SEEM longer. Actual open to actual close of the valve does not change.
Also, maximum lift doesn't directly affect clearance needed. Its more a function of valve overlap between the exhaust and the intake strokes, and where the valves are during this period.
but won't i have some clearance issues?piston to valve clearance?I need to learn a little more on the combustion chamber action ect..
yea best way to find out is to check the piston to valve clearance, but if your running that cam why do you want to run 1.7 rockers? unless you really need the extra lift is kinda pointless, thats a good sized hyd. roller cam. whats the rest of the combo?
I don't know what the combo is going to be yet.I'm still working on the rear end/rear suspension.. I have a set of 1.7's already i'd like to use em.I would like it to be an all motor car-High compression ect....as for heads...I dono wtf i'm going to do.I juut built this whole car and not im running out of money when I get to the cool stuff.
dont cut corners. if you need to wait a little bit then do, call one of your buddys (when your motor is ready to be put together) and have him degree the cam for you and check PTV clearance. LIFT on a cam is one of the last things that matters when checking PTV clearance. do it right the first time
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