97-98 Corvette regulators
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Staging Lane
Joined: Oct 2004
Posts: 98
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From: Near the start of the California gold rush
97-98 Corvette regulators I have the Speed and Performance fuel rail with the vacuum line connected to the intake.
Have done a search about the vacuum portion of things, and can't find an answer.
Engine setup is stock.
Car has a miss, and with the vacuum hose hooked up, I get 53 psi with the key on and it drops to 49 psi with the engine idling. Get 58 psi with the engine idling and the hose off.
If I am not using a supercharger and don't need boost fuel pressure increase, is there any harm to leaving the vacuum line off? The later regulators in the tanks and the Corvette filter / regulator don't seem to have a vacuum reference, so it seems like it shouldn't be a problem.
Thanks in advance.
Patrick
Have done a search about the vacuum portion of things, and can't find an answer.
Engine setup is stock.
Car has a miss, and with the vacuum hose hooked up, I get 53 psi with the key on and it drops to 49 psi with the engine idling. Get 58 psi with the engine idling and the hose off.
If I am not using a supercharger and don't need boost fuel pressure increase, is there any harm to leaving the vacuum line off? The later regulators in the tanks and the Corvette filter / regulator don't seem to have a vacuum reference, so it seems like it shouldn't be a problem.
Thanks in advance.
Patrick
It depends on how your pcm is setup, stock, they are not vacuum referenced, and they are just referenced to atmosphere, while some will say there is a hose on a stock 97-98 vette, I have been told it just goes to the fenderwell in case fuel leaks from the regulator, it won’t go onto the engine.
Ryan
Ryan
