GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

Any RCSBs out there making any real power?

Old Dec 25, 2013 | 10:01 PM
  #11  
Ryan Mills's Avatar
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Originally Posted by dick_landy
Mine is a 2010 RCSB W/T 5.3L 6L80E with a stock steel shaft.

Mods are:
Lysholm 2300 with a 3" pulley
Lingenfelter GT2-3 Cam
Alky Control Methanol injection
Frozenboost heat exchanger
ARH 1-7/8" headers with catted Y pipe
OEM 4" Duramax exhaust
Coan 2800 stall triple disc lock up converter (locks in 3,4,5,6 at WOT)
Caltracs
3.73 gears
Eaton posi that's exploded twice
15x10 rims with 315/60 ET Street Radials

It's capable of quicker but keeps chewing up spider gears, fastest time I've gotten out of it was 11.81 @ 116.81 mph with a 1.62 60' on a 3.25" pulley on pump gas only.

Do you think a diff cover with a girdle will help, or do you already have one of these? It appears that I'll have to get a 4l80e shortly.
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Old Dec 25, 2013 | 10:18 PM
  #12  
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Yea they help. Certainly doesn't make anything bulletproof... But they help
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Old Dec 25, 2013 | 11:06 PM
  #13  
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Originally Posted by Ryan Mills
Do you think a diff cover with a girdle will help, or do you already have one of these? It appears that I'll have to get a 4l80e shortly.
I plan on one as well as a Detroit Locker.
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Old Dec 26, 2013 | 12:04 AM
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My RCSB makes fake power.
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Old Dec 26, 2013 | 07:23 AM
  #15  
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Originally Posted by smokeshow
My RCSB makes fake power.
Nice to know! I'm pretty sure mine is around 230 at the wheel if I had to guess. Mighty turd-like. My biggest concern besides the trans and driveshaft was finding a fueling solution that would work with the factor FSCM, FPCM whatever they want to call it, but after chatting with byrdman, I'm a lot more comfortable with it, after I slip a Walbro 450 in the tank.
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