S480 1.10 AR vs 1.32

9

96strokerwg

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Sep 27, 2008
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Ok.. so with this new set on injectors that im running i cant clean them up anymore with my current set up. It will still have a pretty goo haze at full boost. So im thinking about switching my s475 1.32 AR out for a S480. My question is for you guys that have experience running this turbo. Which AR did you go with? I dont want to suffer on spool up to much with going to the S480 so is was looking into the 1.10 AR help with the spool up. Any opinions??

Thanks!
 
I was told the 1.10 housing is not available.

If you can get one I'd love one too. I got the 1.32 housing.
 
Thanks man!! I need one of these.

Good luck to the op


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- Sent from my iPhone using Tapatalk while pulling a 36ft gooseneck and not paying attention to the road.
 
This is what caught my eye. I sent them an email a couple days ago, but havent heard back yet.

"NEW"
S400w/75mm compressor wheel with 1.10 A/R exhaust and 96/87mm Turbine Wheel
 
I was told by FI that no one makes a t6 1.10 housing for an 80mm wheel.. i'm gonna give them a shout and see..
 
I just spoke with Jose, and he said they ust to do it, but the housings are too thin afterwards with the 96mm wheel, so they quit doing them.
 
Extended Power said:
This is what caught my eye. I sent them an email a couple days ago, but havent heard back yet.

"NEW"
S400w/75mm compressor wheel with 1.10 A/R exhaust and 96/87mm Turbine Wheel
Click to expand...

We CNC T-Dave's parts, we no longer do these. He may have a source elsewhere now to do that particular housing, but we no longer do. Sorry guys.....the castings are just to thin after the CNC process....to much of a liability and we just can't take that chance of someone getting hurt.
 
Hey Kord, What size injectors did you step up to? Kortney is doing my twins right now and he's wanting to go with the 1.10 on the s475.
 
Rich at Doghouse Diesel (Cumminalong) has an S480 with a 1.1....

Might ask him who he went with...
 
Talking with Jose, I now know that Forced Inductions has a 83, an 87, and a 92mm in the 1.10, and in a 1.25 A/R
But they only offer the 96mm in the 1.32 A/R housing. (Didn't even ask if they went bigger then 1.32)
 
I am thinking of changing mine up a little bit...not sure yet...

Right now with my 66/71/.80 divided housing, and S480/96/1.32...it seems a little too slow for the streets.

Apparently, there are some 1.10 A/R housings available for my exsisting turbine wheel...OR, I could go with a smaller turbine wheel, and housing. (Like an S480/87/1.10) -Basically replace the entire turbo...

I'm just wondering how much the drive pressure would go up...cuz I cant slip the 1.32 on if it's too high. But there is a 1.25 A/R as well. (Which I would prolly get as well.)

To the OP: Sorry for the derail.
 
FTR my 62/71/13 ^ 480 (96/80/1.32) drives /spools really well on the street...

Just wondering if I could acheive same results with a bit faster spooling primary..

But who am I kidding... That would take $.


So....
 
Extended Power said:
I am thinking of changing mine up a little bit...not sure yet...

Right now with my 66/71/.80 divided housing, and S480/96/1.32...it seems a little too slow for the streets.

Apparently, there are some 1.10 A/R housings available for my exsisting turbine wheel...OR, I could go with a smaller turbine wheel, and housing. (Like an S480/87/1.10) -Basically replace the entire turbo...

I'm just wondering how much the drive pressure would go up...cuz I cant slip the 1.32 on if it's too high. But there is a 1.25 A/R as well. (Which I would prolly get as well.)

To the OP: Sorry for the derail.
Click to expand...

Yes we have a larger A/R for the 96mm turbine then the 1.32A/R. Also on the dyno we get better spool and better turbine efficiency with the 92mm turbine wheel and the smaller A/R's. We have a customer dynoing a set of twins now on the engine stand for a cummins/offshore powerboat setup. Should have final results on that setup too with some other changes we made. But initially he was suffering from to much lag with the 96mm turbine wheel and the smaller turbine housing we cut for him a long while back helped a good bit, but turbine efficiency drops. That is why sometimes you guys are seeing quicker spool up but EGT's going up. If your turbine efficiency drops, EGT's will climb. After some testing when swapping to the 92mm setup, we picked up power through the entire boost range and especially EGT's came down, and in a powerboat that is the main thing as they run on a constant duty cycle for LONG periods of time. So its something to think about. Your starting off with turbine efficiency of around ~68% or so with the 96mm turbine wheel so keep that in mind.....
 
Last edited:
DRTurbo said:
Yes we have a larger A/R for the 96mm turbine then the 1.32A/R. Also on the dyno we get better spool and better turbine efficiency with the 92mm turbine wheel and the smaller A/R's. We have a customer dynoing a set of twins now on the engine stand for a cummins/offshore powerboat setup. Should have final results on that setup too with some other changes we made. But initially he was suffering from to much lag with the 96mm turbine wheel and the smaller turbine housing we cut for him a long while back helped a good bit, but turbine efficiency drops. That is why sometimes you guys are seeing quicker spool up but EGT's going up. If your turbine efficiency drops, EGT's will climb. After some testing when swapping to the 92mm setup, we picked up power through the entire boost range and especially EGT's came down, and in a powerboat that is the main thing as they run on a constant duty cycle for LONG periods of time. So its something to think about. Your starting off with turbine efficiency of around ~68% or so with the 96mm turbine wheel so keep that in mind.....
Click to expand...

So if I go with an 87 or 92mm turbine wheel, and smaller housing, (1.10 or the 1.25 A/R) does the efficiency go down more?

Dropping from a 96mm to a 87 is a huge difference...

BTW...did you happen to watch the video I posted to see what I had for drive vs boost pressures?
 
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