I am about to begin my build of my 06 revup with a powerlab turbo kit/haltech and would like some advise from the experts about matching cams to turbos to achive increased power at topend i.e. 7000 rpms. I'm looking at the 264 and the 272 cam sets and am hoping to maintain my powerband but open up the topend some. Any input would be helpful.

 

the single will push more on top end, so id recomend 264º....i like BC cams STG2 personally

 

Your intake mani and/or heads will be the limiting factor before the BC stage 2's.....

SP rev'd those cams to 9K rpm with CJM intake and some serious porting and 1mm larger valves.

tom

 

Unless BC has introduced new cams recently, they do not make cams for the Revup motor. So, BC cams are out.

Take a look at the GTM Stage 2 cams, as well as the JWT S7R and C8R cams. Much depends on your desired hp and torque curve. The JWT C8R cams and GTM Stg 2 cams will give you the most top end power due to their longer duration, but the S7R cams will probably provide a bit more mid-rpm torque. I would expect that, with the shorter duration, the S7R cams would provide the best idle charcteristics from among these cam choices, but this is speculation because I don't have hard data on the cam lobe separation angle and valve overlap for the GTM cams. Either way, you will probably want a re-flash to bump your rpms up to smooth out the idle.

 

ah yea, missed the revup part.........damn you terry always catching the details

tom

 

Actually, even though I caught that it was revup, I started off describing the non-revup cams. I had to go back and edit it.

 

I am mainly concern with avoiding power drop off to ~7200 rpms without lossins too much midrange power that the powerlab kit is know for. I read the Jtrain build thread and was surprise by the 150 hp loss of power at the topend. I know there will be some loss with this setup but I would like to minimize it.

 

^^^^

The GTM Stage 2 cams and JWT C8R cams both should hold power to 7200 rpm, assuming the rest of the build is up to snuff.

I suspect that the S7R cams also will hold power to 7200 rpm, but probably will not provide as much power up there as the C8R's or GTM Stage 2's, though I suspect the S7R's will perform slightly better in the mid-rpms.

I would speak with JWT and GTM directly and tell them your setup and your goals. Also, ask if they have any dyno charts on a build using their cams with a setup similar to yours.