Hey guys,
Got a quick question.
We were on the dyno the other night with my mates 32, we upped the boost from 1.1bar (strong, flatline 1.1 with no dropoff) to 1.4bar had a nice increase in torque and power (around 220kw) but, after boost ramps up nicely to 1.4, it slowly drops all the way to 1.1 by redline. Its as if the turbo is running out of puff.
Currently running a HKS 2530 63T with 0.64 housing, Tomei 260 cams (timing unknown at this point, but EX looks to be retarded for nice midrange judging by the CAS), HKS Adjustable actuator adjusted to achieve 1.4 bar with no bleed off, PowerFC. We previously had a mech bleed valve with actautor set to 1bar, did the same thing.
After viewing plenty of RB20 dyno sheets it seems common that people have boost drop across the revrange, so im betting on an EBC but just thought id get some input cos theyre not exactly cheap.
Must we run a EBC to control the boost? Im doubting it but could it be the cam timing affecting the boost so dramatically? Should we '0' the cams? Theyre the only other thing untouched.
Cheers!
Mat.