Rhall

Old Skooler
Aug 12, 2006
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With the common Mahle piston bowl configuration HP is lost with the modified spray angle found in the Bosch motorsports nozzels vers the stock tip spray angles in the D-max and HP is gained in the common rail Cummins when using the MS nozzels.

Did you learn the duramax side with your dyno tuning? If so i also recall you guys saying you made no tuning changes between swapping hard parts. Injectors with a different spray pattern can really be touchy with tuning.
 

MarkBroviak

DMax Junkie
Vendor/Sponsor
May 25, 2008
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Did you learn the duramax side with your dyno tuning? If so i also recall you guys saying you made no tuning changes between swapping hard parts. Injectors with a different spray pattern can really be touchy with tuning.

X2, that is correct as we also tried different sets of injectors.:thumb:
 

Whitetail Addict

Rockin' the stock tune
May 8, 2008
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I dunno. I was rambling on after a couple beers. :D

In the movie "The Last Indian", you just pour metal in your garage and file it when it cools to make pistons.

That was "World's Fastest Indian". Great movie by the way...I don't know how mechanically accurate though.

I need to get my clutches hung up with a sign that says "Offerings to the Speed god".
 

Rhall

Old Skooler
Aug 12, 2006
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X2, that is correct as we also tried different sets of injectors.:thumb:

Ok, so if no tuning changes were made, how is it known that there is really hp to be lost with the different spray pattern and the mahle piston bowl design? Im not even sure if Tony got this info from this, but if there was no tuning changes, that wouldnt be a fair statement.

Im just asking as this could be good data... but only if taken properly.
 

J Spruill

bringer of truth
Mar 30, 2008
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had dinner with Cole,Mahle rep and few others almost 2 years ago. these pistons were being discussed/pushed for.

Wade, please try to refrain from shitting up these threads. i have been nice to you and do support the runs and progress you have made. if you think you can offer helpful info to these guys then spill it out. i doubt you will...
 

Diesel power

New member
Jun 2, 2008
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had dinner with Cole,Mahle rep and few others almost 2 years ago. these pistons were being discussed/pushed for.

Wade, please try to refrain from shitting up these threads. i have been nice to you and do support the runs and progress you have made. if you think you can offer helpful info to these guys then spill it out. i doubt you will...

every time i try i get hammered for my opinion.

I'll just keep my knowledge to myself for now as no one appriciates it.

by all means please go out and use what steve and mcrat says are the thing to have...
 

J Spruill

bringer of truth
Mar 30, 2008
770
0
16
every time i try i get hammered for my opinion.

I'll just keep my knowledge to myself for now as no one appriciates it.

by all means please go out and use what steve and mcrat says are the thing to have...

Wade ive seen you post plenty of opinions,but never much usable info. when it comes to you or Steve, i will stick with Steve.Give up some useful info and im sure attitudes will start to change. Just saying this isnt the answer doesnt cut it. Put some usebable info out here. i beleive you know the info,but will you actually tell and help someone?
 

McRat

Diesel Hotrodder
Aug 2, 2006
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www.mcratracing.com