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Injector size

Posted: Fri May 12, 2017 9:10 am
by maych87
I have a 1989 Porsche 911 with a 3.6 l. I am setting up the injector size in tuner studio. Porsche runs a much higher fuel pressure than 43.5 psi that most injectors are flow tested at. Do I use my injector flow rating at 43.5 psi or what they are rated at for my vehicles fuel pressure?


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Re: Injector size

Posted: Fri May 12, 2017 11:11 am
by grom_e30
the flow rate they will be at in your install.

Re: Injector size

Posted: Fri Jun 09, 2017 11:11 pm
by maych87
The manual says 55psi engine off pump running. And 48psi engine at idle. Which is the proper psi to use?


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Re: Injector size

Posted: Sat Jun 10, 2017 1:56 am
by DaveEFI
You use the higher one. That is the pressure at full throttle.