G
Guest
·We tried some dyno tuning with a couple cars today, but unfortunately, mine didn't appear happy. Possibly due to the fact that we have a VPC chip for the stock twins in there, it ended up with a bizarre fuel curve, leaning it out oddly in the middle of the top end. We got a GCC in to tweak it (wasn't using a fuel controller before, much smoother pulls now), but weren't able to get it back on the dyno to push it farther and verify all was well.
So, nutshell, here are a couple dyno runs with some fuel problems, but it's a baseline. Best run at ~17.5PSI (1.23kg/cm2) was 484RWHP with 469RWTQ. Put down 448RWHP/433RWTQ at just under 16PSI (1.1kg/cm2), where the A/F ratio stayed a little more sane. Turned up the boost to 24PSI "just to see" and got up to 530RWTQ at ~4200RPM before letting off as the A/F was 14:1 and getting leaner (TQ was still climbing hard). Kinda scary because I've driven it like this multiple times, I was really surprised to see the A/F go all psycho.
So it definitely needs some work with a fuel controller to work these out. On a related happy note (I'm sure we'll see more detail from him), [email protected]'s car SP01 put down 819RWHP on spray..
-Pete
So, nutshell, here are a couple dyno runs with some fuel problems, but it's a baseline. Best run at ~17.5PSI (1.23kg/cm2) was 484RWHP with 469RWTQ. Put down 448RWHP/433RWTQ at just under 16PSI (1.1kg/cm2), where the A/F ratio stayed a little more sane. Turned up the boost to 24PSI "just to see" and got up to 530RWTQ at ~4200RPM before letting off as the A/F was 14:1 and getting leaner (TQ was still climbing hard). Kinda scary because I've driven it like this multiple times, I was really surprised to see the A/F go all psycho.

So it definitely needs some work with a fuel controller to work these out. On a related happy note (I'm sure we'll see more detail from him), [email protected]'s car SP01 put down 819RWHP on spray..
-Pete