Strange Dyno Results???

[Cubes]

The difference I noticed is it wouldn't flick to 7500rpm easy. It felt like I was over reving if I didn't change before 6500rpm.

[mr_rbman]

I'm more interested at the RPM or km/h that the peak torque was made.

 

It may be that on 11psi boost holds constant through the rev range allowing peak torque to be made higher in the rpm.

On 13psi the boost may peak up then being to taper off maybe half a psi to 12.5psi. This will cause torque to drop slightly in the higher rpm as boost has dropped slightly. Or it may have spiked to say 14psi then settled on 13psi giving the higher peak torque at a lower rpm.

 

Reason I speculate is this is what mine did with a bleeder.

I fitted an EBC and boost was held at what it was set to right until thr 7500rpm cut. No matter how much boost I pumped in to it 15-16psi it would still drop to 12.5psi over 5500rpm.

 

I later sold the EBC and modified the wastegate actuator's bracket so I could reduce the travel which forces boost to be held in the higher rpm's, just like an adjustable rod.

 

159rwkw is a good result for 13psi.

I would assume your AFR's are fairly sorted, which means your fuel pump is near its limit.

its still running a little lean and my tuner told me not to boost it til my new fuel pump is in!!! I also never use 13 PSI, 11 is more than enough to get the tyres smoking in 2nd!!!

[mr_rbman]

i'm getting a bosch 040 in the next week!