The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

Dual Wallys respond great to pressure increase!

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

turboglenn

15+ Year Contributor
6,375
124
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.
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Latest posts

Build Thread Updates

Latest Classifieds

Back
Top