My goal is 450-475 rwhp. Running 850cc primaries, 1680cc secondaries, Aeromotive fuel regulator, and Rotary Performance Competition Fuel Pump (new version). Question is will the fuel pump be able to pump the volume I will need? And what pressure should I set it at?

 

your injectors will support lots more than your hp goal... go to Rotary Performance's site and the calculator for specifics...

as to fuel pump... i run 850/1600 injectors and the SR Cosmo pump. i run 41 psi fuel static. i run approx 87% duty cycle on the injectors at one bar and my fuel pressure is 56 psi w no drop off at 8000 rpm.

a Kenne Bell Boost A Pump is the reason my pump doesn't break a sweat. as soon as i hit boost it raises the volts to my pump anywhere from zero to 50%. i run it at plus 20%.

if i didn't run the BAP i would have to run either a bigger pump or doubles. running a big pump recycles and heats the gas as well as making more noise and requiring more electrical drain more of the time.

the BAP is an easy install. mine is next to my battery behind the passenger seat. check out the Kenne Bell website as there's lots of engineering. they have been making them for 30 years...

howard coleman

 

What pressure switch did you use? I've seen BMW applications using a supercharger and the 5psi switch having a lot of problems stabilizing fueling when the BAP comes online (20-30% increase in voltage, ~15v@5psi). I'm just curious if you set this sort of thing up in an FD if you would want a lower or high pressure switch.

~Tim

 

You grabbed my attention howard, i am interested in more details of your boost a pump install as well.

93FD3S (tony right?) chris and ari from RP have told me many times that the pump you (and I) have will support 500 rwhp as tested on their dyno.

 

Yeah Rich you got the name right. I really hope the pump is good enough. I'm gonna tune on the dyno so I can watch my fuel pressure just to make sure.

 

i digitally log (Power FC & Datalogit) my fuel pressure so i can tell you exactly what my fuel pressure is in every one of the available 400 data cells. i can also tell the high, low and average in each cell. i have over 400 logs from last year alone.

there is NO fuel pressure bulge as i go into boost w the Kenne Bell Boost A Pump.

i run an Aeromotive adj fuel pressure regulator. the boost regulator/sensor comes with the BAP. as i have previously posted, Kenne Bell is a 30+ year company and they have an excellent engineering oriented website.

my BAP control umit is in the package compartment (pass side) next to my battery. a boost solenoid resides on the driver's side of the engine compartment. a vacuum hose from the front side of the UIM runs to the solenoid and 2 wires run back to the control module. a heavy output wire runs laterally about 3 feet from the module to the fuelpump/battery wire. there is a rotary dial (zero to 50% voltage gain) that resides near the top of my battery. i can easily reach it while driving though there isn't a need to adjust it as it gets it done at 20% gain.

i have about 8500 miles on it and my fuel pump seems to be working just fine w the occasional voltage additions.

$200.

BTW, as to Chris and Ari... i consider anything they say to be well worth listening to. if they say their pump is good for "X" hp i would take it to the bank. my hp target is 615 so i do need the BAP.

howard coleman

 

What pressure does the pump activate at? I know they have pressure sensors for just about every PSi...

 

Thanks for the info Mr. Coleman. I appreciate.

 

Howard,
As always I take your word as gospel...

For the newbies--> Chris and Ari say their pump is good for X horsepower....just make sure you have enough voltage. Measure it at the pump to make sure it doesn't drop voltage during boost conditions.

John