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-   -   Max RPM (http://forums.pelicanparts.com/911-engine-rebuilding-forum/393675-max-rpm.html)

Sigurd 02-19-2008 06:38 AM
Max RPM
 
I'm currently building a 2.7 with JE pistons, CIS, and 964 profile cams. What maximum rpm should I plan for on this motor? Maximum meaning occasional, not constant.

Eagledriver 02-19-2008 09:36 PM
The first limitation is the valve springs. With stock valve springs and retainers you should not exceed the stock 964 rev limit. I don't know what that is, but probably around 6500. The bottom end is good for 7000 with occational trips to 7500. With stiffer valve springs and/or titanium retainers the valve train will be good for 7500 or so.

-Andy

Steve@Rennsport 02-19-2008 11:55 PM
Sigurd,

964 cams have peaked by 6500 RPM so running the engine beyond that simply constitutes abuse,....:)

Re-gear the car to always keep the RPM between 4500 & 6300 at each shift and you'll be just fine.


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