z_boi Posted January 12, 2005 Share Posted January 12, 2005 I have an aeromotive A1000-6 FPR and a jsk fuel rail. My fuel pressure drops when i rev the engine. Is that supposed to happen? I also jus changed the pump to a higher flow bosch pump and it still does the same thing? ( pump flows 50gph which is about 190lph and 100 max psi ) whats stock pressure supposed to be? this if for a 78 280z. Quote Link to comment Share on other sites More sharing options...
zcarnut Posted January 13, 2005 Share Posted January 13, 2005 No. The fuel pressure regulator should increase the rail pressure as the throttle is opened. The FSM has a spec of 30psi at idle and 37psi at open throttle. Quote Link to comment Share on other sites More sharing options...
Guest 81na ZX Posted January 13, 2005 Share Posted January 13, 2005 Do you have it referencing vaccum? I have that AFR in my DSM, and if you have a vac line going to the top port, and are creating a vac, FP will go down. That reg will increase pressure 1 psi of fuel for avery 1 psi of boost... or decrease it for every "psi" of vac. Quote Link to comment Share on other sites More sharing options...
z_boi Posted January 14, 2005 Author Share Posted January 14, 2005 there is only one port for vacuum or boost. It comes out the side. this is the one i have.... http://216.242.145.16/products/product.phtml?p=10 Quote Link to comment Share on other sites More sharing options...
onovakind67 Posted January 15, 2005 Share Posted January 15, 2005 I have an aeromotive A1000-6 FPR and a jsk fuel rail. My fuel pressure drops when i rev the engine. Is that supposed to happen? I also jus changed the pump to a higher flow bosch pump and it still does the same thing? ( pump flows 50gph which is about 190lph and 100 max psi ) whats stock pressure supposed to be? this if for a 78 280z. How much does it drop? Every regulator has limited compliance, so they all vary somewhat. Quote Link to comment Share on other sites More sharing options...
speeder Posted January 15, 2005 Share Posted January 15, 2005 That FPR will reference fuel pressure to manifold pressure on a 1:1 basis (1 pound of MAP change = 1 pound fuel pressure change. If there is vacuum in the manifold, fuel pressure will decrease from the base setting (atmospheric = vacuum reference hose disconnected) , With positive MAP, fuel pressure will increase. Quote Link to comment Share on other sites More sharing options...
EZ-E Posted January 15, 2005 Share Posted January 15, 2005 Exactly as the others said, so if your set at 36 psi with the vacumn off, at idle you should be good, when you reconnect the vacumn at idle you will see it drop to about 30 psi. No worries there. Quote Link to comment Share on other sites More sharing options...
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