Help me please!!!

[amateo]

I have a fpr and evo viii fuel pump, i run at 80 psi but on 6000rpm the pressure decrease to 40 psi, so i need to know what is the reason and how i can resolve this issue, a/f 18.5 in this case, maybe the engine could broke it.

 

[Ben89]

fuel pump could be dying, maybe try a walboro 255lph there pretty good.

 

[350ep70gr]

80 psi...????:homer: Are you sure mate? This is almost the double from what you need...:homer:


Chris

 

[gorganl2000]

that 80psi has me wondering also......
i know sometimes larger fuel pumps can really take the fuel pressure up a bit when runnign some big boost at WOT.....but 80 psi?.....i wonder when he sees this pressure??--idle/cruise/wot???

 

[350ep70gr]

that 80psi has me wondering also......
i know sometimes larger fuel pumps can really take the fuel pressure up a bit when runnign some big boost at WOT.....but 80 psi?.....i wonder when he sees this pressure??--idle/cruise/wot???

Yea. Evo viii pump dont think it is capable for over 65 psi even if it is totaly blocked.



Chris

 

[mingles]

Why are u running so much fuel pressure?80 is def to much.With the vac line off u shud be at 43 or so.

 

[350ep70gr]

Why are u running so much fuel pressure?80 is def to much.With the vac line off u shud be at 43 or so.

Yea correct.As above^^^^ 40 to 45 sounds loggical.

Chris

 

[amateo]

thanks maybe the FPR is not good, or the fuel pump, i have the OEM FPR but i drilled to use another, really i thought this pressure is very high, but let me know if i have to change the FPR or something...