Chevy and GMC Duramax Diesel Forum - View Single Post - Is it safe to raise the Rev limiter to 4400?

**ob_1jr** · 06-09-2007, 08:26 PM

Grade braking and fueling up that high are totally different. On grade braking it is perfectly safe for the truck to run up to 4800 (at least from the allison site). I don't think there is much benifit to raise the rev limiter past 4000. The engine will spin fine at 4400, but I don't know if I would make a habit out of it over normal driving. As far as the PPE, I'm not sure about the rev limiter removal function.

06-09-2007, 08:26 PM	eBay Motors #10 (permalink)
ob_1jr Super Moderator Join Date: Aug 2005 Location: Alaska Posts: 1,733	Grade braking and fueling up that high are totally different. On grade braking it is perfectly safe for the truck to run up to 4800 (at least from the allison site). I don't think there is much benifit to raise the rev limiter past 4000. The engine will spin fine at 4400, but I don't know if I would make a habit out of it over normal driving. As far as the PPE, I'm not sure about the rev limiter removal function. __________________ 2004 GMC 2500HD D/A CC Carbon Metallic w/ LB7 4" turbo back MBRP exhaust TST Powermax Programmer, Diablosport Predator 285/75-16 BFG T/A KOs, Eagle Alloys Series 187 Clifford 2 way remote start, High Idle, Bilsteins Extang Classic Platinum Tonneau Cover AFE Magnum Force Stage 2 Proguard 7 intake Kennedy Diesel Merchant Automotive My Photos