What are you seeing for rail pressure with dual fuelers at WOT?

dmkolb · Oct 25, 2014

I was chatting with someone tonight and they asked what my rail pressure was at WOT. I said it stays right at around 25K. The response I got back was it should be around 27K with dual K16 pumps. Curious what everyone else was getting with dual fuelers and thoughts on this.

Motostroker · Oct 25, 2014

Depends on what tunes you are running and what the tuner commands

White_monster · Oct 25, 2014

:whs:

Motostroker · Oct 25, 2014

You shouldn't be dropping rail with dual pumps though, if your really are. Then something is wrong

dmkolb · Oct 25, 2014

It's not dropping rail pressure. It gets up to right around 25K and stays there. No dropping. Just curious if anyone else is hitting higher pressures?

Motostroker · Oct 25, 2014

What tunes you running?

Mike@MPD · Oct 25, 2014

25k is what eric said is perfect on mine

bigrpowr · Oct 25, 2014

24.5 is pretty standard. There's no power above there , just broken fuel lines.

Dzchey21 · Oct 25, 2014

bigrpowr said:
24.5 is pretty standard. There's no power above there , just broken fuel lines.

Yep, i have tried 27k ON mine with not much luck. Smoke is a hair less but you have to drop pulse width to match that. 24.5 is what the system was made for and thats what seams to work the best.

6.4 Stroker · Oct 25, 2014

Dzchey21 said:
Yep, i have tried 27k ON mine with not much luck. Smoke is a hair less but you have to drop pulse width to match that. 24.5 is what the system was made for and thats what seams to work the best.

I wonder why that is. You would think the higher pressure the better atomization which would equal more power.

08Monster · Oct 25, 2014

New CAT common rail engines run at 40k+ rail pressure.

Dzchey21 · Oct 25, 2014

6.4 Stroker said:
I wonder why that is. You would think the higher pressure the better atomization which would equal more power.

Yeah thats what you would think, I honestly dont know on that. Just from what i have found it doesnt really change anything.

08Monster said:
New CAT common rail engines run at 40k+ rail pressure.

You sure about that? I havent seen anything over 24k

C15 MEUI injectors produce 30k inside the injector, but i havent seen anything commong rail much over 20k

08Monster · Oct 25, 2014

I'm a CAT diesel technician. Haha

Dzchey21 · Oct 25, 2014

what engine specifically?

White_monster · Oct 25, 2014

Was wondering that too Dustin.

Morgan@Midwest Diesel & Auto · Oct 25, 2014

Yeah far as I know nothing cat makes 40k. Unless it fails and does it..

08Monster · Oct 25, 2014

Its one of the high performance engines that goes in a 657E scraper. 3412 maybe? I'll have to look on my laptop when I get to work on Monday. The techs have access to the "high performance" stuff as well, your average 3412 won't run that high, I just rebuilt it, dynoed it, and ran for 3hrs and RP was anywhere from 38k-42k. Twin gigantic turbos. Made around 5000hp at 1500rpm.

dmkolb · Oct 25, 2014

I'm running Gearhead tunes. Someone asked. So what I'm taking from this 25K is good and anything higher doesn't seem to do anything?

ckrueg · Oct 25, 2014

I read in diesel power about am engine that would use something like 40 ksi injection pressure. I noticed on my single pump all my tables command something like 26k but it never goes above 24.7 k even on a 1.2ms tune. Anyone know why that is?