N/A vs Turbo Cams?

Nd4SpdSe · Post by **Nd4SpdSe** » February 4th, 2007, 12:40 am

Just wondering, what is the the difference between then? What would happen if you ran turbo grinded cams in an N/A car, and visa versa?

Spinkx79 · Post by **Spinkx79** » February 6th, 2007, 5:45 pm

If you are looking for Re-Grinds check the Group Buy section later this week, im just waiting for appproval from Jeff to do a Bulk Buy.

Will be offering his regular 3 grinds (NA, Turbo and Race), plus a custom set he is making special for me.

Nd4SpdSe · Post by **Nd4SpdSe** » February 6th, 2007, 8:22 pm

lol, maybe, but i would like to know what's do special about turbo cams and how they affect N/A performance

jaydog5678 · Post by **jaydog5678** » February 6th, 2007, 10:23 pm

A turbo cam would lose power in an N/A engine. It all depends on the cam profile though. Turbo cams generally have a shorter overlap period and duration for a good reason - to minimize reversion back through the intake side on a turbo engine. In an N/A engine, you need overlap and duration to help bring in some fresh air on the intake stroke. While the exhaust valves are closing, the intake valves start to open and that's where the overlap is taking place. Longer duration on an N/A engine helps it to breath better at higher rpm while increasing volumetric effieciency. An N/A engine needs as little air intake restriction as possible through a good cam. It needs to make full use of the intake stroke by getting as much air into the cyl. A turbo cam does not have that profile. Because you are forcing air through a turbo engine, it's not necessary to have such a high overlap, long duration cam. Reversion is the biggest problem as well as a power loss.

Spinkx79 · Post by **Spinkx79** » February 13th, 2007, 5:26 pm

FYI - BB feeler is on now.

http://forums.probetalk.com/showthread. ... 1922995013

frafro · Post by **frafro** » February 18th, 2007, 5:43 pm

Can I use kl31 in intake and kl01 in exaust