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

6.2 shift points and MPG

Old Feb 27, 2013 | 11:12 AM
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Default 6.2 shift points and MPG

going to do some more tuning tonight. not touch the tune since i put the longtubes on and now i put some bigger injectors bc the stocks where almost out already. truck has long tubes CAI and just bigger injectors now.

the question i have is what are yall running you rpms out to in 1-2 and 2-3 and so on? it ran a 9.0 1/8 the other night and i think i can get it down to some 8.80s with some more changes. 5800 1-2 and 6000 2-3. im thinking 6200 1-2 and 6300 2-3?

also what kinda MPG are yall getting at curse? i think im going to play with those tables also bc im only getting about 16 or so and iv heard 19 is what most get. not that i care as much on the gas but it would be nice to have.

sorry for all the questions just playing with this new stuff some!
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Old Feb 27, 2013 | 11:25 AM
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also what kinda timing are yall running at wot?
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Old Feb 27, 2013 | 12:26 PM
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timing varies on fuel type

out of injector? how?!?! what year truck?

mine shifted at 6100 on stock cam in every gear.
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Old Feb 27, 2013 | 12:35 PM
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Mine shifts 1-2 at 6200 and 2-3,3-4 at 6300.
Picked up 5 mph on the 1/4 just by a tune.

Cruising at 65 I get 19.5 mpg
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Old Feb 27, 2013 | 04:56 PM
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Inj. We about Max with the tune. Going to some 53lbs and work it a little. I'm goin to move the shift points up and see how that does. Thanks for the info
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Old Feb 27, 2013 | 05:03 PM
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I believe mine are 6400 with cam. Truck was 6100 on stock cam. What do you tune with?
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Old Feb 27, 2013 | 05:50 PM
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My good old HP tuners! Lol
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Old Feb 28, 2013 | 10:13 AM
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if you're maxed, or close to it in idc with just bolt ons, you have a series tune issue in the maf scaling and pe tables that needs to be addressed.
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