SOS TS Max Turbo Kit Build Thread
11-05-2013, 01:33 PM
#401
Former Sponsor
When I saw this kit come out, I thought to myself, did SOS finally nail the magic formula? No compromises; no downside; fast twin scroll spool with plenty of power and an easy bolt-on installation? I was really excited. SOS is a great vendor and they make solid products. But as we've learned, this is what it was designed to be; not what we all assumed/hoped it was. It's heartbreaking to see RAIN H8R dissatisfied with the kit, but honestly I think that's because this wasn't the right choice for his goals. None of us anticipated this outcome or we would have warned him up front.
The power curve posted is due to the turbocharger selected not the system used. The GTX3576R purchased by the customer produced the exact flow rate that the Garrett's advertised flow chart for this turbocharger compressor says it will produce. At 7000 RPM, it is making it's maximum flow rate at this pressure ratio. While manifold design for sure has influence on engine performance, the turbocharger in this case is specifically the reason why this power curve looks the way it does.
This is not a turbocharger we recommended, it was one that the customer specifically requested. This turbocharger is optimized for the power the flow chart dictates, and is beneficial (due to the billet GTX wheel) for higher pressure ratios than what standard pump fuel will allow. We've posted dyno graphs of the GT3582R, which show the power curve not flattening out, specifically because the larger 82mm compressor wheel supports more air flow.
While we are disappointed that Dustin decided to sell the kit - we want to reiterate that the flattening of the power curve is due to the turbocharger selected, not a "flaw" in the system's design.
11-05-2013, 01:37 PM
#402
I wonder how come my gtx3576r makes power all the way to 9,000rpm. This is also with straight 91octane on a stock f20c.
Last time I checked the normal gt3582r cast compressor wheel flow the same 65lb/min as the smaller gtx 76mm billet compressor wheel.
Last time I checked the normal gt3582r cast compressor wheel flow the same 65lb/min as the smaller gtx 76mm billet compressor wheel.
11-05-2013, 01:37 PM
#403
Former Sponsor
Please read the thread. This is not a manifold issue. The customer does not have a GT3582R as you state, he has a GTX3576R which has a smaller compressor wheel. The 76mm compressor wheel is limited in flow rate at the pressure ratio that engine was tuned for. The same system with a GT3582R (which a dyno plot was posted) does not result in a power curve flattening.
11-05-2013, 01:48 PM
#404
Former Sponsor
GTX3076R: at a PR of 2.0 (approximately what is being compared here), the air flow is ~ 42 LB/MIN at 76% efficiency. 42 LB/MIN = ~420 bhp, which is exactly what the customer's engine is making.
http://www.himni-racing.com/images/GTX3076R_comp1.JPG
GT3582R: at a PR of 2.0, the air flow is ~ 52 LB/MIN at 76% efficiency:
http://img684.imageshack.us/img684/5...gt3582rmap.gif
11-05-2013, 03:52 PM
#407
Former Sponsor
Thumbs up. I know you're considering other options, but I think you'd really miss the responsiveness and other features of this kit that we think is unmatched. We'd definitely be willing to help you out price wise with a new setup using a different turbocharger if you ever decide to give it another go. Just keep in touch.
11-05-2013, 04:26 PM
#408
Thumbs up. I know you're considering other options, but I think you'd really miss the responsiveness and other features of this kit that we think is unmatched. We'd definitely be willing to help you out price wise with a new setup using a different turbocharger if you ever decide to give it another go. Just keep in touch.
11-05-2013, 04:33 PM
#409
Originally Posted by RAIN H8R' timestamp='1383698581' post='22863446
Trust me I am not confused. I certainly know the issue.
Sent from my Samsung Galaxy S4
Sent from my Samsung Galaxy S4
Originally Posted by ScienceofSpeed' timestamp='1383699157' post='22863455
Thumbs up. I know you're considering other options, but I think you'd really miss the responsiveness and other features of this kit that we think is unmatched. We'd definitely be willing to help you out price wise with a new setup using a different turbocharger if you ever decide to give it another go. Just keep in touch.
11-05-2013, 04:44 PM
#410
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I think with the proper turbo that kit would have kept you happy down low and given you the punch up top that everyone likes.
Is the new owner going to put it through the paces on a road course by chance? As of now I'm leaning towards a 'bigger HP' setup but I don't want to paint myself into a corner with it either. This kit is damn complete and looks OEM. Big plus for me.