|07.5-2010 LMM Performance Parts Discussion Discussion of Performance Parts For the 07 and up LMM Duramax Trucks No Advertising|
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|12-25-2012, 12:55 AM||eBay Motors #11 (permalink)|
Join Date: Jul 2010
Location: Athens, GA
He probably also tuned it. They were giving stock tunes with dpf turned off mileage
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|12-26-2012, 12:28 PM||eBay Motors #12 (permalink)|
Join Date: Mar 2012
Location: Chelsea, IA
I have done exactly this on mine. Diamond Eye 4" with muffler, deleted dpf and shutoff egr. I have not noticed any great increases in mpg, although we are getting into winter fuel and longer idle warmups. I have tracked every tank since I bought the truck in Oct 2011 (81k mi), deleted in Nov 2012 (101k mi). I am trying to see if there is any significant change before I buy some tuning, but have a feeling the tuning will do more for mpg than eliminating regens and exhaust restrictions.
current: 07 LMM ec/sb ltz black & black, DE 4" turbo back, egr shut off, Edge Insight CTS
dead: 06 lbz ec/sb white, killed a honda on its way out
|12-26-2012, 01:03 PM||eBay Motors #13 (permalink)|
Join Date: Mar 2011
Location: Northern MN
Biggest thing is cooler EGT's and maybe better throttle response and mileage, less back pressure should let the turbo spool a little better.
2008 2500HD LTZ, EFI Live- Idaho Rob's Tunes, 4" Magnaflow Turbo Back, Raptor 150 Lift Pump, Transgo Jr, All Season Diesel EGR delete with high flow Y-bridge, Edge Insight for gauges,
|12-30-2012, 09:41 PM||eBay Motors #14 (permalink)|
Join Date: Feb 2011
Location: Brownwood/College Station, TX
If I remember correctly, my LMM did 310hp stock with DPF and everything. With the 5" straight pipe (no tuning yet) it did 330hp. All my truck did without a tune though was back out of the first garage bay and pull into the next where it dynoed. I think you'll run into issues if you delete the DPF and don't tune it.
Fightin' Texas Aggie Class of 2014
2009 GMC Duramax Diesel ECSB 4x4 - EFI Live by Relentless Diesel Performance, EGR blocked, 5" turbo back, Autometer boost & pyro, XD Badlands, Mickey Thompson MTZs, color matched, debadged, t-bars lowered, 2" drop shackles, Recon cab lights, UWS toolbox, Cobra 29 CB