L67 max boost with stock top end and bottom end

[Car8cole]

Hi I currently finished tuning my 2001 buick regal gs at 10psi with the cartuning turbo set up and have a manual boost controller I can hook up. Was just wondering if I could safely up the boost more. I have plenty of fuel and zero knock across the board on 10 psi at 17* timing. The kit comes set factory at 10 psi but I am wondering how much more boost i can run. Everything is stock in the engine other then 42.5lb injectors. But the engine internally is completely untouched with 72,000 miles. I heard over 10 psi we get valve float. Would just like some one to confirm on this.

[Car8cole]

Any one?

[5FDP]

People make like 14-15 psi with a GEN V blowers on stock motors, 10psi ain't nothing on a 3800.

Tons of guys have pushed 20 psi but just be aware that the stock valve springs may hold you back before you ever got there. I made 9-10 psi in the winter no problem with stock RPM shift point and no valve float. I sure past the 15 psi and over the factory shift rpm you may run into problems.

I'd upgrade to a stronger springs if you really want to push it. Bump it up to 12-13 psi, see what it's like and make sure you still have injector headroom.

[Car8cole]

What do you log to make sure your not maxing your injectors? Duty cycle?

[5FDP]

Pulse width for both banks, then duty cycle will appear as it's a math function. You'd need to be logging it in the charts for it to appear.