some questions about tuning afr's and boost

[tweak666]

I'm running 7lbs of boost, fuel pressure base at 32lbs with vac. Afr's are good (btw 11 and 12) up until WOT above 3000rpms, then it just goes flat 10. Before i switched to the Lex afm, i was having a problem with the wastegate door sticking shut, and i was hitting fuel cut. I've since fixed that and now want to increase the boost. I'm running a super conservative tune for now, should I incrimentally increase the boost till the mix starts to lean? or should i make the tune leaner (afr btw 11 and 11.5) then increase boost a bit and retune? the car as it sits today: worked 7mgte, 680cc injectors, lex afm, stock turbo, super AFR, profec b.

 

[Fletch124]

On 11-12psi you can tune your car for 11.7-12.0AFR at full boost. You want the AFRs to taper out as the boost rises.

 

[isnms]

There is a link, in my sig, to some worksheets that you can use with your wideband logs to tune your s-afr.
Caution on making more than 20% adjustment as it affects timing.

 

[nosman4]

Set the fuel pressure without the vacuum line attached, you do have a adjustable fuel pressure regulator correct? Check the TSRM for pressure numbers.http://www.cygnusx1.net/Supra/Library/TSRM/MK3/
I would set the pressure and then and see where it runs and then lower the fuel pressure until the numbers start to come up at WOT. Then use the SAFC to tune it to the exact AFR's if you do it this way you won't have a ton of negative adjustment like isnms said.