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Dual Wallys respond great to pressure increase!

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turboglenn

15+ Year Contributor
6,375
123
Nov 5, 2007
RIpley, West Virginia
Well, I was going out for a bite to eat and a case of mountain dew and as always i was romping on the car being that it was warmer today and i could hook up a little better i decided to up the boost to 25psi.

So, i'm at 25 psi and running 12.2:1 AFR wide open. After getting my food i decided to turn up the FP for the ride home to see what it would do. I raised it 5 psi back to 45 psi ( it had been lowered to 40 a few days ago playing with it) Then i did another 3rd and partial 4th gear pull on the way home and went from that 12.2 to a 11.0 - 10.8:1 AFR

I was like WOW! just thought i'd share.. I know one pump doesn't respond that nice to 5 psi. I could literally get away with not having the laptop and make a alrge change in AFR, that was kinda nice :)
 
They are parallel pumps, dual in-tank wally 255HP's ( both are also pump configuration # 342)

NOw if i could find some way to only need to fire each injector every other revolution, I could double my pulsewidth :D I'm going to have to experiemtn though, i'm sure there's soemthing i can do, technically on sequential it should only use them once every 2 revolutions, but the ECU won't allow you to set up the sequencing that way :banghead: IF i can figure it out i can go from a max of 7ms @ 8500 RPM, to an awesome 15ms @ 8500 rpm (effectively doubling the injector's output), but since it hasn't been documented as being done before (that i cna find) it will just be testing until i figure it out.
 
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