Turbo brake - Chevy and GMC Duramax Diesel Forum
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post #1 of 6 (permalink) Old 01-23-2020, 07:30 PM Thread Starter
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Turbo brake

I am supposed to have a turbo brake option on my tow tune. How do you know it's working? Doesn't feel any different to me. Thanks.

2005 GMC SLT LLY/KRYPTONITE UPPERS
6IN FABTECH/20x12MOTOMETAL969/35IN TOYO M/T
ATP EFI-LIVE WITH CTS CONTROL
4IN MBRP STAINLESS DUALS/3IN MBRP DOWN PIPE
AIRAID INTAKE/AFE TURBO INLET
PPE RACE FUEL VALVE
PPE PORTED FUEL FITTING
AIRDOG DF-200
SNOW WATER/METH INJECTION
CALVIN'S TRANS W/SUNCOAST CONVERTER
TRAIL READY BUMPERS/WARN M15000 WINCH
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post #2 of 6 (permalink) Old 01-23-2020, 08:05 PM
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Are you running with T/H on?

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post #3 of 6 (permalink) Old 01-24-2020, 09:27 AM
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Put turbo boost as a pid on your cts2. When you're in tow/haul, above about 1,800 rpm in 2nd gear, or in any higher gear, let off the throttle. You'll see boost and feel the truck slowing.

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'05 GMC Sierra, Hummer wheels & a little bending of the inner fender. 2" drop shackles. S&B mouthpiece. Studs. Kenwood stereo w/ steering wheel controls & JL Audio door speakers. Diode to keep the low beams on w/ the high beams. Oh, and a canoe rack. A truck is useless without a canoe rack.
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post #4 of 6 (permalink) Old 01-24-2020, 03:27 PM
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Testing the turbo brake function before towing.
It works best with towhaul engaged, manual shift, select maybe 3rd or 4th gear, get your rpms up above about 2500, then let off the throttle.
Feel the drag slowing you down if you have it.

Turbo brake kicks out around 1500-1800 rpms, you’ll pretty much will never have the function working in drive.
That’s why I run my heavy tow tune with turbo brake as my only tune running 24/7 365.

If you want to view the turbo brake functioning on your CTS select “Turbo Vane Position” as one of your pids.
Bottom right (9%) this is while idling (rumble tune) when the turbo brake is doing its job it should be about 98%-100% which is closed.
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post #5 of 6 (permalink) Old 01-24-2020, 08:30 PM Thread Starter
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Thanks for the replies. I didn't realize it doesn't work below 1800rpm. That's why I haven't noticed it. I always run with t/h on. I'll give it a shot tomorrow.

2005 GMC SLT LLY/KRYPTONITE UPPERS
6IN FABTECH/20x12MOTOMETAL969/35IN TOYO M/T
ATP EFI-LIVE WITH CTS CONTROL
4IN MBRP STAINLESS DUALS/3IN MBRP DOWN PIPE
AIRAID INTAKE/AFE TURBO INLET
PPE RACE FUEL VALVE
PPE PORTED FUEL FITTING
AIRDOG DF-200
SNOW WATER/METH INJECTION
CALVIN'S TRANS W/SUNCOAST CONVERTER
TRAIL READY BUMPERS/WARN M15000 WINCH
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post #6 of 6 (permalink) Old 02-01-2020, 04:36 PM Thread Starter
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Well I tried what y'all said. Works like a champ. Thanks

2005 GMC SLT LLY/KRYPTONITE UPPERS
6IN FABTECH/20x12MOTOMETAL969/35IN TOYO M/T
ATP EFI-LIVE WITH CTS CONTROL
4IN MBRP STAINLESS DUALS/3IN MBRP DOWN PIPE
AIRAID INTAKE/AFE TURBO INLET
PPE RACE FUEL VALVE
PPE PORTED FUEL FITTING
AIRDOG DF-200
SNOW WATER/METH INJECTION
CALVIN'S TRANS W/SUNCOAST CONVERTER
TRAIL READY BUMPERS/WARN M15000 WINCH
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