wired up the second pump today and took it for a drive. afr's have dropped into the mid 11s now. everything seems to be working good now.

 

Since the double pumper doesn't use a filter (Fullblown) or uses a inline filter (BR) and gets rid of the stock filter, I would be curious to see what your stock filter housing looks like. If it looks dark from the outside, I have a feeling it was cloggged.

We've had a FPgreen to 420whp on our mustang dyno (bit more than you are making on a dynojet depending on what cool kid conversion you use) and the single walboro was still fine and RC1000cc injectors where at a little over 90% IDC via evoscan.

 

Bryan,

I am wondering on that Green you mention, your dyno to a DJ would make that 480-490? Did you still have fuel control at the 90% or was it going lean on its own? I am sure that we deal with alot of clogged filter cars around here because of the recent E85 revolution but thats still in the range we see where the pump maxes out with the 1000's.

I have pushed 1200s a little harder and managed slightly lower IDCs at the same power level (85% at 475whp) with one pump on E85 but even the math shows the pump is about done.

1200cc=1.2L, 1.2 * 60 * 4=288lph demand at 100% IDC

 

Still have full fuel control on the car, it's been running perfectly fine for months now. I don't really run out of *injector* fuel control until over 100% IDC reported in Evoscan. Not that I keep a car at over 100% IDC.

The couple times I have run out of single pump on our dyno, it has been around 460-470whp and the IDC's have been in the 90's as well and I have lost control of fuel.