Fuel PSI

[DollarBill]

I have a 00 Busa with the stock ext fuel pump I just tested the psi at the test point on the pump and it read 45 psi I have a crushed one that i will be testing soon to see the diff. I have a 1397 head job and cam hp 220 224. is this setup as good as the walboro ext pump and an aftermarket reg if i am getting the same pressure?? what would be the difference

[STREETDRAG]

Volume is the issue your gonna have with a stock pump..

[erikjennes]

nope.
I have seen stock pumps deliver no more or just over than 200 bhp.
Some say more but this is my experience.

MR 12 maxed nout at 187 with my own bike with the internal fuel pump (2005)

My advice is to get an aftermarket pump with a good regulator

[JLANG]

I have a 00 Busa with the stock ext fuel pump I just tested the psi at the test point on the pump and it read 45 psi I have a crushed one that i will be testing soon to see the diff. I have a 1397 head job and cam hp 220 224. is this setup as good as the walboro ext pump and an aftermarket reg if i am getting the same pressure?? what would be the difference

With this why not replace the stock pump with a walbro internal.. It will work for ur hp, don't see a need to go with external unless running a wet shot

[STREETDRAG]

They do make high volume 99-00 replacements.. Advice, tear the whole pump apart and clean it. another thing you will need to do regular maintenance unless you filter what you pour in tank. They can get trash in the system easily.. you can also do inline filters to help, when they get dirty unclamp lines swap and reclamp..Lots of power is lots in trashy injectors and pump flow..

With this why not replace the stock pump with a walbro internal.. It will work for ur hp, don't see a need to go with external unless running a wet shot

[BROTHER-N-LAW]

I have a 00 Busa with the stock ext fuel pump I just tested the psi at the test point on the pump and it read 45 psi I have a crushed one that i will be testing soon to see the diff. I have a 1397 head job and cam hp 220 224. is this setup as good as the walboro ext pump and an aftermarket reg if i am getting the same pressure?? what would be the difference

Forget all that. Just get some s2000 injectors. It will give all the fuel you need for that. They plug right in to the stock harness. No need to change you fuel system or do any modifications. Just put them in and go to the dyno!!!!!!!!!!