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What fuel pressure?

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Old Mar 30, 2007 | 08:26 PM
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Default What fuel pressure?

What should the fuel pressure at the rail be on a 99 LS1?
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Old Mar 30, 2007 | 08:32 PM
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55-60psi is usualy the base pressure.
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Old Mar 30, 2007 | 08:33 PM
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Originally Posted by Jake@EPP
55-60psi is usualy the base pressure.
Thanks
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Old Apr 2, 2007 | 04:12 PM
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If I could piggyback on this thread a bit.

Yes, it should be 58 psi at idle and above.

On an LT1 you pull a vacuum hose to get the manifold vacuum bled off to get the wot fuel pressure at idle.

Do you do a similar thing on the LSx?

On the LTx I always pulled the vacuum hose on the passenger side above cylinder 6. I can't seem to find a good place to do the same on the LSx.

Perry
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Old Apr 2, 2007 | 05:47 PM
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Originally Posted by pkincy
If I could piggyback on this thread a bit.

Yes, it should be 58 psi at idle and above.

On an LT1 you pull a vacuum hose to get the manifold vacuum bled off to get the wot fuel pressure at idle.

Do you do a similar thing on the LSx?

On the LTx I always pulled the vacuum hose on the passenger side above cylinder 6. I can't seem to find a good place to do the same on the LSx.

Perry
The lsX motors (except some of the vettes) have a standard regulator. This is why you have a injector flow rate table , instead of a single number for the injector size.
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