08 Chevy 3500 LMM Van

[2001-GMC-LB7]

Looking to upgrade 2008 Chevy Van G3500 Extended Cargo for some more power, fuel economy.
I see searching the form I need to add a block to egr or eliminate, PCV reroute kit, change to better down pipe and 4" exhaust -dpf.
I have EFI Live v2.

Did I miss anything?
Does anyone have a Tune that is safe for stock trans, 4L85e?

Looking for better MPG and some more HP, Torque...
Van Runs great just not even close to power my stock LB7 had.

Thank You

Jeff

 

[2001-GMC-LB7]

Need Info Please, Van Guys!

Looking to upgrade 2008 Chevy Van G3500 Extended Cargo for some more power, fuel economy.
I see searching the form I need to add a block to egr or eliminate, PCV reroute kit, change to better down pipe and 4" exhaust -dpf.
I have EFI Live v2.

Did I miss anything?
Does anyone have a Tune that is safe for stock trans, 4L85e?

Looking for better MPG and some more HP, Torque...
Van Runs great just not even close to power my stock LB7 had.

Thank You

Jeff

Bump...

 

[FishinFather]

I have been searching for similar info...

 

[ShopSpecialties]

4" exhaust, Kennedy lift pump, PCV reroute, deep pan and bigger cooler for trans, EGR block or delete. I wouldn't worry about a downpipe since you are not running near enough horse to notice a difference. Talk to the tuners (ATP, Kory Willis PPEI, Kennedy, DuramaxTuner, etc) for a tune.

 

[lotsofmiles]

I love vans:woott:

 

[lotsofmiles]

Yup. I really love vans
:woott:



:hello:

 

[2001-GMC-LB7]

4" exhaust, Kennedy lift pump, PCV reroute, deep pan and bigger cooler for trans, EGR block or delete. I wouldn't worry about a downpipe since you are not running near enough horse to notice a difference. Talk to the tuners (ATP, Kory Willis PPEI, Kennedy, DuramaxTuner, etc) for a tune.

No body lists an exhaust for the vans?
Do you know what pickup system will fit a 2008 Express extended cargo van 1 ton G35???

Thank You.

 

[SteveLBZ06]

Just remove exhaust at downpipe and leave it like that.

 

[ShopSpecialties]

Pick a brand and put it on. The truck exhaust fits the vans.

 

[malibu795]

I got a lbz tune that I ran on mine..

 

[DetailsUnlimited]

How much beefing up does the tran need? Just a TC or clutches to? Don't know to much about the 4l85e.

 

[malibu795]

Depends how much power you want..
I eventually worn out the 2nd gear sprag and the OEM TC that had a cast aluminum TCC piston broke after some 100,000 rolling 26k plus what ever the previous owner did..at some 198k I figured I was running 275-300 at the crank vs 250.. I replaced the sprag with a 34 element unit and TC with with a TC from transtar with a billet TCC piston..
Off the top of my head basic things I did to mine.
I bumped boost to ~28-30psi
Timing to 8-13* in part throttle area and 25? @WOT
ReScaled MAF
Rescaled throttle tables
Added 150-200uS to stock pulse width or little less than 1/2 the difference between the truck and van pulse width was for same year
Timing alone made the most difference..

 

[ShopSpecialties]

I have 281,000 miles on my stock trans with 250,000+ running a 50 horse tune. The first thing I did was install a bigger cooler and pan. The 4L85E is just an upgraded 4L80E.