Duramax Diesels Forum Truck of the Week
  #16  
Old 03-15-2018, 10:00 AM
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Originally Posted by Burn Down View Post
No way is 65/85 going to be worth a chit on stock fuel.... Compared to a stocker/75, I have ran several versions on stock fuel and hands down the 75 over stock was the most versatile and fun. Now built eng is another story...
depends on how big the pulse width is. my modded ihi/83 ran just fine on a 1.32a/r and stock injectors. i did/do run dual pumps and the tow tune was 3250uS though

im actually about to swap the 83's housing down to a 1.15 though and see how it does. 6th gear doesnt like to light off the 83 at 1800rpm like the 75 would.
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Old 03-15-2018, 11:26 AM
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Originally Posted by diesel-max View Post
My daily driver has a 65mm vgt in the valley and a 485/96/ T-6 1.10 as the atmosphere, I used the 1.10 as I already had it laying around. I'd use the newer 1.15 if I didn't, its more cost effective and a REALLY nice housing for the same purpose.



It made 1132hp at the tire on my chassis dyno before I quit turning it up. It drives like stock and tows absolutely awesome!


Are you gated around the 65? I thought the 65 was to much of a restriction to get over 950hp.


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  #18  
Old 03-15-2018, 11:39 AM
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Say what you want... The op wants a great towing setup at 600hp and from what I can tell he’s on stock fuel/bottom end. My 82/87 with a 1.1 housing is not better than the 75 I replaced it with. It has more power potential (that was never being debated)... Comparing built engines to stock engines is laughable
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  #19  
Old 03-15-2018, 12:24 PM
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i hope hes not going to try to tow at 600hp without some engine and cooling work
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02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

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back from the dead 7:04pm 4/9/2012

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  #20  
Old 03-15-2018, 12:27 PM
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Originally Posted by Burn Down View Post
Say what you want... The op wants a great towing setup at 600hp and from what I can tell heís on stock fuel/bottom end. My 82/87 with a 1.1 housing is not better than the 75 I replaced it with. It has more power potential (that was never being debated)... Comparing built engines to stock engines is laughable
Assuming the cam & head & compression ratio differences are not extreme, most people with 'built' engines could put their air and fuel setup on a stock long block and they wouldn't know the difference. And vise versa.

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  #21  
Old 03-15-2018, 12:42 PM
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I have a s475 with a 6 blade billet wheel with the standard .63 cover & a 1.10 housing, its the best all around setup Ive run so far

Id like to change the crossover & downpipe someday to run Tial's SS 1.17 v-band housing but I hate the fact that they cost almost $800
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  #22  
Old 03-15-2018, 12:58 PM
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Assuming the cam & head & compression ratio differences are not extreme, most people with 'built' engines could put their air and fuel setup on a stock long block and they wouldn't know the difference. And vise versa.

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Sure, if you want to waste a ton of money on parts not needed to make 600hp.
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  #23  
Old 03-15-2018, 12:59 PM
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Originally Posted by Chevy1925 View Post
i hope hes not going to try to tow at 600hp without some engine and cooling work
Agreed. But some on here would have this guy thinking he could tow at 1100.
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  #24  
Old 03-15-2018, 01:00 PM
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Quote:
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Agreed. But some on here would have this guy thinking he could tow at 1100.
should i try that?
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Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
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  #25  
Old 03-15-2018, 01:08 PM
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Quote:
Originally Posted by Burn Down View Post
Sure, if you want to waste a ton of money on parts not needed to make 600hp.
I was referring to your comparing built engines with stock statement. But thats getting off topic anyhow so nevermind

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  #26  
Old 03-15-2018, 01:24 PM
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Quote:
Originally Posted by Chevy1925 View Post
should i try that?
dont be a chicken shit James turn it up!

Quote:
Originally Posted by ikeG View Post
I was referring to your comparing built engines with stock statement. But thats getting off topic anyhow so nevermind

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So whatís your recommendation for the op. My point was itís tough to beat a 75 stocker setup for towing on a stock engine. Not a 1100hp built setup. Can it make as much power as a big atmo no but it will spool quicker and better suit the opís needs. How are we off topic?
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Old 03-15-2018, 01:33 PM
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I missed your point til now. I thought you were talking specifically about the turbos' driving characteristics with built vs stock engines, not the potential and capabilities. And if we discussed that it would be off topic.

For towing I would definitely try a 87 tw in either a t6 housing or even a 1.25 t4. They are extremely lazy for a t4 in a single setup in my experience. But if you make/buy a kit with a t4 flange you limit yourself severely on turbo changes in the future.

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Last edited by ikeG; 03-15-2018 at 02:42 PM.
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  #28  
Old 03-15-2018, 01:53 PM
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Quote:
Originally Posted by ikeG View Post
I missed your point til now. I thought you were talking specifically about the turbos' driving characteristics with built vs stock engines, not the potential and capabilities. And if we discussed that it would be off topic.

For towing I would definitely try a 87 tw in either a t6 housing or even a 1.25 t4. They are extremely lazy for a t4 in my experience. But if you make/buy a kit with a t4 flange you limit yourself severely on turbo changes in the future.

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Ok Iím with you. I think we all misunderstand each other sometimes.
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  #29  
Old 03-15-2018, 07:07 PM
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Are you gated around the 65? I thought the 65 was to much of a restriction to get over 950hp.


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Gates are required for drive pressure regulating. So sizing on compressors doesnít really have much to do with that need.

But the 65, is what was determined to be a fleece cheetah that was acquired on the original junk yard motor. Itís a 4094 turbine wheel thatís been clipped into a lbz housing that has been bored out to make it fit, They also used a cast 4088 wheel in it, so I had my man Mark send me one of his vane packages and he has a 4088 billet compressor wheel so naturally it was a drop in replacement. Iím not sure how if even possible he would compare it to his line of chargers.

The atmosphere is a SD 5blade 85/96T-6 1.10

At 2250uS and 24* it made 1132hp at the tire on my dyno dynamics dual eddy chassis dyno.

I donít have a switch, nor will I probably ever in any of my trucks and just this past week I hauled a buddies lbz on my gooseneck and it did great.
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  #30  
Old 05-06-2018, 01:15 PM
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Quote:
Originally Posted by diesel-max View Post
Gates are required for drive pressure regulating. So sizing on compressors doesnít really have much to do with that need.

But the 65, is what was determined to be a fleece cheetah that was acquired on the original junk yard motor. Itís a 4094 turbine wheel thatís been clipped into a lbz housing that has been bored out to make it fit, They also used a cast 4088 wheel in it, so I had my man Mark send me one of his vane packages and he has a 4088 billet compressor wheel so naturally it was a drop in replacement. Iím not sure how if even possible he would compare it to his line of chargers.

The atmosphere is a SD 5blade 85/96T-6 1.10

At 2250uS and 24* it made 1132hp at the tire on my dyno dynamics dual eddy chassis dyno.

I donít have a switch, nor will I probably ever in any of my trucks and just this past week I hauled a buddies lbz on my gooseneck and it did great.
How did you like the 5blade from SD? I've been considering going that route, except with a 480 when the time is right. How do they sound?

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