How much fuel pressure on stock LT1's??
How much fuel pressure on stock LT1's??
10-10-2004, 11:42 PM
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Re: How much fuel pressure on stock LT1's??
At idle, with vacuum compensation line off the fuel pressure regulator, you should see 43.5psi, +/- 2.5psi, so anything from 41-46psi is OK. Reconnect the vacuum line, and fuel pressure should drop proportional to intake manifold vacuum.... a 6 to 8psi drop from the "no vacuum" reading is normal with a stock cam, a little less drop with a more radical cam.
Then take it out on the road, and up to max rpm/max load, and fuel pressure should hold within 2psi of the "no vacuum" reading.
Then take it out on the road, and up to max rpm/max load, and fuel pressure should hold within 2psi of the "no vacuum" reading.
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