6.7 cummins s476?

b.scheid

b.scheid

greenhat
Joined
Feb 21, 2015
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83
im in the process of building up my truck (the one in my sig) and im tring to decide what turbo to go with. i found a really good deal on a s476/87/.90 and was wondering if i could spool it on stock fuel untill i get my nozzels and dual fuelers. anyone have any insight on this?
 
I'm sure tuning would play a big role in the drivability but the 87 turbine isn't that big in a .9, especially on a 6.7. I do realize stock fueling won't be able to get on top of the charger as quick but I still can't see it waiting until 2400 to come to life. I would guess that charger could come to life and be ready to go before or right around 2k.


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Black Diesel said:
I'm sure tuning would play a big role in the drivability but the 87 turbine isn't that big in a .9, especially on a 6.7. I do realize stock fueling won't be able to get on top of the charger as quick but I still can't see it waiting until 2400 to come to life. I would guess that charger could come to life and be ready to go before or right around 2k.


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6 blade LI 478/87/.90 with 150's and dual pumps lit around 2100 rpms.
 
What is your definition of lit? Just starting to make boost? Above 5 psi? I'm sure everyone's definition is subjective to their liking but I'm just curious what you mean by that.


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Black Diesel said:
What is your definition of lit? Just starting to make boost? Above 5 psi? I'm sure everyone's definition is subjective to their liking but I'm just curious what you mean by that.


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The point where it won't lag, and boost is essentially controllable.
 
Ive ridden in a truck before with that same turbine wheel/housing combo with dual pumps and I believe 200s or 200% overs, can't remember, and it seemed to come on faster than what you're describing. I'm not arguing with you I'm just sharing an experience I had. Good luck on the turbo choice OP.


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Black Diesel said:
Ive ridden in a truck before with that same turbine wheel/housing combo with dual pumps and I believe 200s or 200% overs, can't remember, and it seemed to come on faster than what you're describing. I'm not arguing with you I'm just sharing an experience I had. Good luck on the turbo choice OP.


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I could see 200% over being quicker.
 
Maybe that was the difference. I would have to ask to double check but it was a fun truck to ride in for sure.


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I'd look into an SXE 369 with either a .91 T4 or a 1.0 T4 if you want maximum top-end power.
 
Im currently running a 476/87.90 it starts to make boost around 1650rpms but I have 250% overs and dual pumps.
 
If it's a good deal, you could always just get it, and put it up until your ready for it.
 
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