Some tuning help please

[1BADVAN]

I am in the process of tuning my van with the t-smec and it seems that as i turn up the boost past 12psi i feel no power increase :confused:

Any suggestions on what to try and adjust?

Also i sometimes get the knock light from 4k rpm to 5k rpm but only if i go from a rolling start, never from a standing launch??

any ideas for that one?

Thanks!

[cordes]

How far past 12PSI? Are you dragging the brakes to hold it at a certain RPM, recording your readings, and then adjusting accordingly?

[turbovanman²]

What's your setup? What fuel? What turbo? Wideband?

[ShelGame]

I am in the process of tuning my van with the t-smec and it seems that as i turn up the boost past 12psi i feel no power increase :confused:

Any suggestions on what to try and adjust?

Also i sometimes get the knock light from 4k rpm to 5k rpm but only if i go from a rolling start, never from a standing launch??

any ideas for that one?

Thanks!

You also need to adjust the wastegate duty cycle. The stock table only goes up to the stock boost. Just follow approx the same slope. I usually use ~80%DC @ 18psi...

EDIT: Hold on - I re-read. Do you mean you get no boost past 12psi? Or that the power at 16psi is no different than at 12psi?

[1BADVAN]

Sorry i looked at my timing curve and the cal was taking out alt of timing after 12 psi and that helped! i just got back from running a 14.9 and a 15.0 on 14 psi at the track! With a happy 2.3 60' time