12psi
 

Just wondering if 12psi is the safe setting for stock twins!

Well, as safe can be i guess?

Thanks

With my setup I'm hitting 92% duty cycle, which is pretty high. I have hit 100% duty cycle running 13psi and I'm lucky that I didn't blow my engine. I also have a high flow fuel pump. To be on the safe side get a high flow fuel pump and get the injectors bored out.

When you get the ECU set up it should tell you exactly what your Duty Cycle is just dont go over 90%.

On a stock Fd would uprating the Fuel pump help lower the duty cycle or is theat somthing that can only be altered by replacing the Injectors?

That duty cycle if for your injectors. A hi-flo fuel pump you should have to make sure you have enough fuel flowing. 12 psi is about the limit for stock injectors - 13 psi would take you close to 100% - 1200cc secondaries are a nice upgrade. The turbos themselves can be run up to 15 psi safely but anything after that they are beyond their efficiency and will get too much heat.