Duramax Diesels Forum Truck of the Week
  #16  
Old 07-17-2017, 05:39 AM
kowclub173 kowclub173 is offline
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Originally Posted by hondarider552 View Post
They don't lower overall temps one bit.


Dyno and countless first had reviews state you are wrong. Peak might still be the same but takes much longer to get there.


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  #17  
Old 07-17-2017, 07:09 AM
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I've found egts are a bit higher just cruising with my profab manifolds and up pipes vs the stock stuff. WOT i definitely a different story though. Bigger isnt always better for towing. Honestly for towing heavy the 3794 is probably about as big as you want to go to keep egts in control. Any bigger and the stock turbo is probably better. Twins would be best, but its alot of cash. Danville's 3794 has done well for me towing. I'll be honest though, power is up, and so are the egts a bit while towing. The stock turbo ran pretty dang cool for me towing here in MN. It barely ever broke 1100*. BUT, also had quite a bit less pulling power vs the 3794. My buddy has danvilles 4094 stg2r, and his truck runs warmer than mine towing, even though his spoolup from a stop is about twice as quick as mine.(4094 ex. housing is quite a bit bigger than the 3794)
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  #18  
Old 07-17-2017, 07:22 AM
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Twins FTW.
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  #19  
Old 07-17-2017, 07:43 AM
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Quote:
Originally Posted by monster50iii View Post
I've found egts are a bit higher just cruising with my profab manifolds and up pipes vs the stock stuff. WOT i definitely a different story though. Bigger isnt always better for towing. Honestly for towing heavy the 3794 is probably about as big as you want to go to keep egts in control. Any bigger and the stock turbo is probably better. Twins would be best, but its alot of cash. Danville's 3794 has done well for me towing. I'll be honest though, power is up, and so are the egts a bit while towing. The stock turbo ran pretty dang cool for me towing here in MN. It barely ever broke 1100*. BUT, also had quite a bit less pulling power vs the 3794. My buddy has danvilles 4094 stg2r, and his truck runs warmer than mine towing, even though his spoolup from a stop is about twice as quick as mine.(4094 ex. housing is quite a bit bigger than the 3794)
Who's tuning do you have? I heard Mark's tunes run super cool....
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  #20  
Old 07-17-2017, 09:56 AM
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I had Mark's stuff for a year or two and now am doing my own tuning. Marks stuff ran alot cooler than the PPEI stuff I tried originally. Marks tuning was alot more fun to drive than the PPEI tunes. That and Mark is a super nice guy. But, tuning only goes so far for spool up etc.
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  #21  
Old 07-17-2017, 12:54 PM
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I personally would look at getting your turbo rebuild with a port and polish. Not sure what that's worth for EGT's exactly but if you're not really after more power no point in spending thousands when you can spend hundreds.


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  #22  
Old 07-17-2017, 09:39 PM
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What all else is done in the motor? If your stock internally I'd be careful. I'm running everything you can do basically with stock turbo , injectors, and cp3 in my lmm and motor innards are stock. Got max effort tuning by ppei and I'm a turbo size bigger or injector size from popping my motor.

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  #23  
Old 07-17-2017, 10:01 PM
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Stock aside from my AD2 165 and PPEI tuning...
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  #24  
Old 07-17-2017, 11:39 PM
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P&P with new vanes and wheel call it done.
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  #25  
Old 07-18-2017, 12:20 AM
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Quote:
Originally Posted by Budneeds2beers View Post
P&P with new vanes and wheel call it done.
This with water/Meth or S475/stock. No need to build the trans unless you are going to race it...
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  #26  
Old 07-18-2017, 05:39 AM
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Originally Posted by Stancedlb7 View Post
This with water/Meth or S475/stock. No need to build the trans unless you are going to race it...
So you think a stock trans will hold up towing with twin turbos and a tune? I wouldn't give too much advice......
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  #27  
Old 07-18-2017, 08:15 PM
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Quote:
Originally Posted by TROJAN366 View Post
So you think a stock trans will hold up towing with twin turbos and a tune? I wouldn't give too much advice......
...
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  #28  
Old 07-18-2017, 08:26 PM
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Quote:
Originally Posted by TROJAN366 View Post
So you think a stock trans will hold up towing with twin turbos and a tune? I wouldn't give too much advice......
I couldn't tow on a stock turbo without limping my Lilly, I could make my LMM converter cry the few times I actually towed.

I built my trans ASAP this go around, well, it came out real fast but it was sooner than later, lol.
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  #29  
Old 07-23-2017, 11:32 PM
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Ok, so been doing a bunch more reading, including 90+ pages on Mark's BMW 3794 Stage 2, and a ton of threads on his 68mm Stg2R.

I think I have decided that I am going to replace the factory turbo, then start building another motor. Once I have a short block done in a couple years (LML crank, carillo rods, Mahle cast pistons) I think I will throw a S480 on top over whatever valley charger I am choosing now....

That being said, I think I have narrowed it down to 3 valley chargers. SDP's 3794 68mm w/billet wheel, Danville BMW 3794 Stage 2 or Danville's 68mm Stg2R. All the threads I have been reading about the Danville BMW 3794 make it sounds like the bees knees when it came out, then about a year or 2 later when the 68 Stg2R came out, a bunch of people who were running the 3794 switched to it and said spoolup was about the same but the turbo had more up top...

Prolly going to send my injectors out to Exergy to get them honed to 45% over when I put the turbo in...

So thoughts between the 3 turbos I listed?
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Last edited by novaman64; 07-24-2017 at 07:53 AM.
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  #30  
Old 07-24-2017, 05:29 AM
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3 good choices imo. I'm stuck in the same boat with my LMM. I decided to wait until I can afford a full engine build but I've pretty much landed on the 68stg2r.
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