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08-01-2019, 11:18 PM
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#1
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Name: 91shelbydaytona
Title: Too Much Time
Status: Not Here
Join Date: Nov 2008
Location: Viroqua, WI
Member`s Gallery
Posts: 334
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S475/87/1.25 too small as a primary on 6.7?
My brother just purchased a semi-built truck and the compounds had a bunch of exhaust leaks. We tore the compounds off to repair and turns out it has a s475/87/1.25 t4 charger as a primary. Is this sufficient turbine flow on a 6.7? It's a BD kit that was using a 64/71 as a secondary which we are replacing with a 62/68/14.
__________________
Chris
94 1500 RCSB 12v, Joker Fabrication, Farrell Diesel Service, Hamilton Cams, Airdog
11.40 @ 119.28
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08-02-2019, 08:13 AM
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#2
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Name: 91shelbydaytona
Title: Too Much Time
Status: Not Here
Join Date: Nov 2008
Location: Viroqua, WI
Member`s Gallery
Posts: 334
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That's what I said, but he doesn't want a smokey setup. He wants a quicker spooling tow setup and it supposedly dynoed 750ish hp in this setup. But I'm not sure what drive pressure was
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Chris
94 1500 RCSB 12v, Joker Fabrication, Farrell Diesel Service, Hamilton Cams, Airdog
11.40 @ 119.28
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08-03-2019, 08:15 AM
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#3
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Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
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Posts: 7,346
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I’ve messed around with a 475 as a primary with a 83 t4 1.10 turbine on a 5.9, and if your not racing it sure makes for a fun torquey setup. This was a 12 valve. Instant boost!
I’d imagine it’s only amplified more on a 6.7 with unlimited tuning. Obviously it won’t really hit its true power potential due to the turbine restrictions, but it sounds like a killer towing setup for higher elevations!
Sent from my iPhone using Tapatalk
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Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
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08-03-2019, 10:56 AM
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#4
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Name: straight 6 roar
Title: Too Much Time
Status: Not Here
Join Date: Nov 2010
Location: Oahu, Hawaii
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Posts: 1,031
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Knowing it’s a borg Warner it’s a stepped turbine. Is 87mm the turbine inlet or outlet? Reason for asking is that it could be either a 96/88, 87/81, or 87/80 depending on which side of the wheel you measured. The factory cast 75mm compressor is a little clunky but can support 750 of air with enough injector. On a 6.7 I would definitely keep the 64/71 and I think any of those primaries would work well as a tow setup, with the 96/88 turbine keeping the power further above 3250.
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2006 QCSB 2500 4x4 67/83/.90, +60% overs, TRE trans
1998 QCSB 2500 12 valve 4x4 Sold and missed
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08-03-2019, 07:25 PM
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#5
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Name: 91shelbydaytona
Title: Too Much Time
Status: Not Here
Join Date: Nov 2008
Location: Viroqua, WI
Member`s Gallery
Posts: 334
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It is 87mm on the large side or inducer of the turbine and also has some sort of billet/machined compressor wheel. Im more familiar with 12v stuff and think it would be a great towing/street primary for them, just not too familiar with 6.7s. The 64/71 is toast and we already have a sxe62/68/14 here which is what agp recommended. I think we will put it back on and if need be turn the power down until its a happy setup. Should spool ridiculously fast.
__________________
Chris
94 1500 RCSB 12v, Joker Fabrication, Farrell Diesel Service, Hamilton Cams, Airdog
11.40 @ 119.28
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