PSI on stock fuel system - Pontiac G8 Forum: G8 Forums - G8Board.com
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post #1 of 4 (permalink) Old 07-05-2019, 06:27 AM Thread Starter
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PSI on stock fuel system

What is the max PSI of BOOST I can run on a GXP stock fuel system with ID850 injectors ?

2300 TVS Maggie. Getting 5-6 PSI now.

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post #2 of 4 (permalink) Old 07-10-2019, 11:00 AM
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This is what I dislike about the Pulse Width Modulation of our stock system. Nominally runs 58 PSI. with no return line. With the old SC V6 you had a boost referenced
fuel pressure regulator and a 2 speed fuel pump that ran on a resistor to get low speed for non boost. How hard is it to Add a return line to our gas tank????

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post #3 of 4 (permalink) Old 07-10-2019, 12:13 PM
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Are you running gasoline or ethanol? I wouldn't even run a stock GXP fuel pump with 6 psi and gasoline. But that's me.

I run a stock fuel pump in my GXP, but it runs directly into a surge tank with twin 525 Walbros on an Aeromotive boost referenced system.
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PBM G8 GXP M6-Self flex fuel tune,OBX LTs, Kooks A/B, Monster clutch, 3.45 gear,LSA S/C, cam, fuel system, stock block and stock heads, 12 PSI.
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post #4 of 4 (permalink) Old 07-10-2019, 08:07 PM Thread Starter
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gas.

Thank you !

09 G8 GXP Auto, 4dr GTO [email protected] 6177DA... tvs2300 [email protected] getting closer to a clean run !
07 G5 GT 2.4T Auto, Baby GTO [email protected]
@ 4200' in the sky !
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Originally Posted by andrewbrooks87 View Post
towing stuff with cars is cool !
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