Summary of diesel tuning theory (mechanical injection only) - PeachParts Mercedes-Benz Forum

#1 03-14-2008, 05:22 PM

Quote:

Originally Posted by Tymbrymi

Shadomaker's OM603 with GT37 turbo that was a good example.

Quote:

I'd still like to see if anyone can get the peak anywhere even close to 5000 rpm.
I'm betting a six pack against it.

415hp@5400rpm.

I prefer Coke, not Pepsi.

Brian Carlton · #2 03-14-2008, 05:29 PM

Quote:

Originally Posted by ForcedInduction

415hp@5400rpm.

I prefer Coke, not Pepsi.

I thought we were discussing the 617??

But, regardless..........5400 rpm for a peak is impressive.

I'll send you three cans.............

#3 03-14-2008, 11:43 PM

Quote:

Originally Posted by Brian Carlton

But, regardless..........5400 rpm for a peak is impressive.

That was my point, if it can happen for the 603 then the 617 can't be too much different.

Brian Carlton · #4 03-15-2008, 03:14 PM

Quote:

Originally Posted by ForcedInduction

That was my point, if it can happen for the 603 then the 617 can't be too much different.

What's positively amazing about that graph is the torque curve. It peaks at 3800 but stays reasonably flat all the way out to 5100 rpm.

Contrast that curve to your curve with the VNT. The torque curve peaks fairly low and takes an immediate dive resulting in very little HP increase over stock.

JDmills · #5 03-16-2008, 06:54 PM

Quote:

Originally Posted by Brian Carlton

Contrast that curve to your curve with the VNT. The torque curve peaks fairly low and takes an immediate dive resulting in very little HP increase over stock.

This has to be as a result of different injection pumps.... right? As the 617's IP is more of a limiting factor than what ever turbo happens to be on the outside of the engine.. at least for one dyno run anyway..or am I all mixed up here?