Fuel Pressure

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09-09-2005, 06:54 PM

Buff4Prez Yo

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Fuel Pressure

does anyone know what the stock fuel pressure is on an LS motor. i have an adjustable pressure regulator and need an idea of what to set it to. i'd like to bump up the fuel pressure a bit, whats a good setting if i only have intake and exhaust? also is there any cheap alternative to the B&M pressure gauge i can't justify spending $45 on a gauge like that. i hear that princess auto sells similar gauges for like $10 just gotta re-tap the treads to fit metric

TIA

09-10-2005, 11:07 AM

Mikes_teg

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Stock fuel pressure slightly varies on each car, but roughly around 40-45psi with vacuum hose disconnected.

09-10-2005, 11:57 AM

Buff4Prez Yo

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which vacuum hose? the one attached to the regulator?

09-10-2005, 12:45 PM

Mikes_teg

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Quote:

Originally Posted by Buff4Prez Yo

which vacuum hose? the one attached to the regulator?

Yep the one on the top of the regulator.

09-11-2005, 07:49 PM

WildoutWhiteGSR

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GSR w/vacuum connected = 38 - 46psi
w/ vacuum disconnected = 47 - 55psi

Civic B16a2 w/ vacuum connected = 30 - 37psi
w/ vacuum disconnected = 40 - 47ps

LS b18b1 w/ vacuum connected = 31 - 36psi
w/ vacuum disconnected = 40 - 47psi

CRV b20b w/ vacuum connected = 30 - 37psi
w/ vacuum disconnected = 38 - 46psi

CRV b20z w/ vacuum connected = 31 - 38psi
w/ vacuum disconnected = 40 - 47psi