I'm using 310cc injectors with the stock pump.....if I go with a HP pump, using the 12:1 disk, I'm going to spike my pressure too high with too much fuel. I'm just looking for a pump to supply enough fuel for 80psi and enough flow to support 310cc injectors at that pressure.......I'm getting hints that my stock pump is starting to go. Is the 190lph (non hp) an OEM or slightly better equivelent? If so, where's a good place to buy them?

 

Jeff, check out: www.lightningmotorsports.com follow the links
They have a 190HP # F20000141 for $80 Drops right in, as I've been reading?
Mike

 

I think ours is an equivalant to a 150lph. The 190lph cannot provide fuel at the higher psi levels if needed. The 190 HP for a few bucks more will delivery fuel at the higher psi levels if needed. So no reason not to go with the HP if you are increasing fuel pressures. At 80psi the HP is only supplying around 7 gal/hr more than standard. It's not really untill after that point is where you'll see the HP deliver more than the standard, which craps out between 90-100psi, where the HP can reach to reach 120psi and deliver the same amount of fuel as the stander at 90psi.

That being said. With my Pierburg and 305cc injectors I'm reaching 10.5:1 AFR at redline with a 6:1 disc. This is without an E-manage, I'm not sure what factors that changes.

 

22 gallons/hr at 80 psi= 83279cc/hr

83279/60min=1387.98cc/min

1387.98cc/ 4 injecors= 347cc

So according to Walbro, the 190lph (non hp) will supply me with enough fuel to support my 310cc injectors at 80psi....ok cool.

at 90psi+ is another story.

SOooo....RC engineerings work sheet says to provide me with 227 crank hp....roughly 200rwhp. I would need (at 80psi), a .85 duty cycle, (.6 B.S.F.C), 310cc injectors. I should be all right for supporting 200rwhp then.