I have a timing chain cover if anyone wants one. It's not powder coated any cool color, just stock


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I have a fueling problem...

On the dyno we discovered that the o-ring behind my FPR was in pieces. We replaced the o-ring but we aren't getting enough fuel delivery at upper RPM's. Fuel setup is ID1000's, stock rail, stock FPR, stock lines, Aeromotive 340 pump wired in with a relay. Only shooting for 350-400 HP on a Novi 1220 setup.

We have no clue how long that o-ring had been like that, and it could have been obstructing flow or not allowing fuel pressures to be consistent/correct. Ben thinks the pump is just not capable of flowing what its suppose to at the top-end, i.e. the pump has gone bad from this issue.

I'm planning on removing the injectors and sending them back to ID to have them cleaned/flow tested (~$80), swapping in a new pump (~$150), and a new FPR from Honda just because (~$90) and making sure my fuel rail is clean/clear. Anything else I should look into?

 

The o-ring was in pieces? Is it possible that it got into the fuel and blocked the return line?

 

The o-ring was kinda shredded, but it looked as if the vast majority of it was accounted for. Any remaining pieces wouldn't be large enough to block a line, but tiny pieces could possibly be in the injectors or maybe in the banjo fitting on the return pulsation damper, which is why I'm thinking of having the injectors cleaned/flow tested and cleaning the rail, etc.

 

What is the most psi I can get tuned on with pump 93 safely? 9.6:1 compression built bottom motor.

 

hmmm. 11:1 is around 14ish, i would presume somewhere around 16-18 with no risk of detonation. just ballparking of course. no personal experience.

 

I had a similar issue running a aeromotive stealth pump I chalked it as not having a return but now I wonder if its pump related and should change it when I put the sos return kit in.

 

This is the first that I have heard of problems with the Aeromotive pumps using regular pump gas. I actually ordered one 320 a few days ago for my car.

 

Why not just buy an aftermarket fpr and rail ?

I have an in cabin gauge on mine so I can make sure I am getting enough fuel supply without playing any guessing games. At least you will know the pump is probably the problem


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