So I finally have my blower on again and need some answers. I moved the mass airflow meter to the boost side and thankfully there is no surging. When I was moving the stock ATI bypass I checked to see how sealed it was and needless to say I could blow some air pass the blade. Is this normal? Can I adjust this? I would assume this would cause lost boost? Second, the wife rode with me and watched the wideband as I hammered it and I was running in the 11.5-12 range. I know tuning would be the best bet but can I lower the fuel pressure a little to compensate? I have a fuel pressure gauge installed and I runs 42 at idle, 50ish at WOT.
Thanks

 

If it is just a small amount of air getting by the blade I wouldn't worry about it.... it will be very small leak compared to the air and pressure going to the engine. 11.5 AFR is where you want to be with forced induction.

 

Great, so do you guys feel the fuel pressure is about right? I'm not running an FMU and the block is low CR