Help with DPF Delete/ Mileage

[bwheatley]

I just got a 2007.5 LMM and i use to have lb7 which i had it chipped with 5 inch exhaust and intake got dang good milage then i got a 2007 lbz which was stock and got so so milage then i got this LMM and the milage just plain sucks. 10-11 mpg! Its a big down fall from my lb7. Went threw alot of snow and it kept saying power reduced filter needs cleaned or what ever ha. Wanna get rid of DPF. I need better milage and lil more power without doing a trans upgrade. Anyone got any suggestions?


Thanks

 

[duramaximizer]

You need to get efi live tuning tool. There is a lot to do to make an LMM get the mileage of the LB7. It sucks.

 

[bwheatley]

Would a quadzilla stealth 2 and 4inch magnaflow for $615 be a good deal? how much does the efi run?

thanks

 

[1lowdiesel]

get with some of the vendors on here i'm sure they can set you up with something that you will love. EFI is great it's just not for everyone. also i would suggest that you do consider the TransGo Jr shift kit. it's not a bad install at all and will make the allison last 2-3x as long.

EFI is nice but it's more than the exhaust and intake you are asking about.

 

[bwheatley]

how much does the transgo jr shift kit run? im just want lil more power and milage.

thanks

 

[1lowdiesel]

the JR kit can be found for anywhere between $89-$125 depending where you get it from. if you're looking to add a bit of power you WILL want to do it as a preventative maintenance type thing. with you towing and adding power it's a wise move.

 

[bwheatley]

thanks for your help.. now if i only can someone with a lmm and tell whats the best bang for a buck with exhaust and chip.

thanks

 

[WrekNBall]

IMHO, the Quadzilla Stealth 2 and MBRP 4" turbo back would be the best bang for your buck. Tuner and exhaust should be around $800. The Quad seems to have decent tunes and I'm really happy with mine.

The only issue I ran in to was the truck kept throwing a p2230 code. Found out through my vendor that some models of LMMs need to keep the DPF sensors plugged in to keep the ECM happy.

You will have a hiss at idle that sounds like a jet idling. Mileage has increased a little ~1 mpg and I love the turbo whistle when it's revved up

 

[cdbright]

i turned mine off with EFI live, then bought 5" exhaust, it was a little more $$$$ but you will have allot more room to play with anything in the future as far as adding power and tweaking all levels