need some tuning help PLEASE

[sb7775]

set up
stock motor-small 16g-k+n-full 3in turbo back-255-stock injectors and reg-stage 3 ecu-safc-mcdd logger set up- 16psi
well the problem i having is the would hesitate bad at 4500 at full or part throttle. i changed the mas with a 2g set up and the car pull better. now if i have the car tuned to run .90v on the logger it studder bad, the car also has a lot of knock and not much timing(10-22 knock and 16-22 timing). so i pulled some fuel out so it would pull to 6000 and now my voltage is .81-.84 witch is pretty lean i have less knock now but the car is lean. its just not making any sence to me so i'm looking for a second opinion. thanx for the space steve 508-415-8281

 

[BOBS90TURBO]

That does sound a little wierd, It sounds like your o2 readings are off, If your knock count got better and it killed the high rpm studder(like when rich) I would say your on the right track, you may want to consider going to someone with a wideband o2.

I know I was not any help but I did give you a bump

 

[markgholland]

set up
stock motor-small 16g-k+n-full 3in turbo back-255-stock injectors and reg-stage 3 ecu-safc-mcdd logger set up- 16psi
well the problem i having is the would hesitate bad at 4500 at full or part throttle. i changed the mas with a 2g set up and the car pull better. now if i have the car tuned to run .90v on the logger it studder bad, the car also has a lot of knock and not much timing(10-22 knock and 16-22 timing). so i pulled some fuel out so it would pull to 6000 and now my voltage is .81-.84 witch is pretty lean i have less knock now but the car is lean. its just not making any sence to me so i'm looking for a second opinion. thanx for the space steve 508-415-8281

First of all, try setting your mod list up like this next time. It makes it a lot easier to read.

Small 16G
Walbro 255
Stock injectors
SAFC

The first thing that I would do is make sure that your base timing is at 5 degrees BTDC. You said your not getting much timing, however, you stated that you are getting 16-22 degrees of timing. Does it advance from 16 to 22 degrees when you get full boost? If so, 22 degrees of timing is actually quite good. Check your base timing and get back to us with the results

Also, 02s are misleading. Tune your car to approx .90 with your narrowband and then tune for knock from there. Or you could just get a wideband

~Mark

~Mark