Just woundering how many Flats you guys are running and the effects on your MPG or any before and after stories you would share?

 

I bottomed out my pump before it was rebuilt and upgraded. Not much effect on MPGs as long as you drive with a lighter foot. Any smoke visible out the tailpipe and you are loosing MPGs. Use the power intermittently only on rare occasions and your MPGs should hold fairly steady.

 

I turned mine up just under 2 flat and it blows very little smoke going up the same hill that slowed us down last sat and today it was like it shifted gears better because of the new found power!

 

What exactly is a flat? I figured that if I ever opened up my i.p. that I would figure it out. Now curiosity has me under it's evil control. I'm layed of now, and sitting around anyways, Maybe in a couple of days, I'll play around with it a little. Mine's n.a. so I don't think I'll get that much more out of it, but you never know. Maybe it's turned down a lot, I still don't think it has as much power as I feel it should have. But my butt dyno is getting a little heavier everyday.

 

a flat is one side of the hex wrench it takes to turn the screw.

 

A allen wrench has 6 sides I think any how every side is a flat!

 

It's actually 60 degrees of a turn.

 

60deg = 1 flat and 90 deg is 1.5 flat, Would you agree Galute?

 

yep it is 1.5 flats!!!!!

 

I'm up 2 flats, didn't notice any difference in mpg, got a little smoke and a little power. I'm gonna turn it up one more flat though. Since I got the hypermax intake, it wont smoke at all past 2nd gear so I think I have more room for fuel at higher speeds.

 

Guys, this only matters if the pump's calibration before ya'll messed with it was the factory one, however since very few of us actually bough their trucks brand new back then I don't think counting flats and comparing on here is any meaningful... I for one know that my pump was turned down by the PO, then I turned it up 1 flat, then 1 more flat, still another flat up I was able to outsmoke a road tractor named "the Smokehouse" and living up to it, then I turned the pump down, then I advanced it, then turned it down some more, and I think I'm finally happy with how she is...

 

I assumed mine was still factory set as it wouldn't make a wisp of smoke when I got it and the PO was an old man. I guess you can't really be sure though, he could have had it turned down when the new IP was installed.

 

Hey Sycostange is this what you have? Hypermax - Product Display

 

I want to turn mine up but I cant figure it out I took the little side cover off used a mirror and flashlight and could still never find that screw

 

Back when these trucks were new most pump shops if you ask them for more fuel would only go 10 percent, or that is what they called it. Even on a stock na motor plaaying with the fuel screw without installing a pyro is playing with fire. I am not saying don't do it, but you need a pyro before you turn it up, if for no other reason, you can adjust your driving habits to the way your diesel works and performs best.