LBZ: LBZ tow tune

hondarider552

Getting faster
May 28, 2008
10,627
2
36
34
Arizona
Made this tune a few days ago and loaded it this morning.

Tune is for LBZ OS 12604138 single cab, work truck, manual everything 4wd.


Main pulse raised from stock 1833Us to 2033Us
Timing adjusted via Josh's calculator
305/50/20's for speedo.
EGR off/DTC's adjusted, Turbo brake and LB7 idle adjusted.

Around 50rwhp per seat of pants.
 
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56taskforce

Well-known member
Mar 30, 2014
1,081
56
48
Does it have turbo braking? Thanks for sharing not quite brave enough to try it though not that I don't trust it just don't trust myself not to lose Korys tune during the change. I really want to take an EFI class. I was humbled just loading my V-2 much less getting the tunes on to the ECM :roflmao:. thank God for Korys great customer service.
Merry Christmas you and family Brian.
 

PureHybrid

Isuzu Shakes IT
Feb 15, 2012
3,501
483
83
Central OH
Probably not too bad, mine will make about 10.

Did you set the vane min table to 100% at the braking points? That'll make it do all it wants.
 

NC-smokinlmm

<<<Future tuna killer
May 29, 2011
5,208
363
83
At Da Beach
Probably not too bad, mine will make about 10.

Did you set the vane min table to 100% at the braking points? That'll make it do all it wants.

At 11 on my lml I never even have to touch the brakes until the converter unlocks. I'll bet 15 will just about stop you...
 

Dozerboy

Well-known member
Jun 23, 2009
4,903
486
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TX of course
PIS during braking is all RPMs unloaded IIRC I can hit 15 manually shifting. So its more about down shifting then tuning whether is the Ally shifting or you.
 

hondarider552

Getting faster
May 28, 2008
10,627
2
36
34
Arizona
X2. with the turbo brake it's all on RPM. Under 1500 it's useless. It really shines at 3200-2200rpm. If you don't manually downshift in tow/haul your only using about half of the total braking power.
 

Dozerboy

Well-known member
Jun 23, 2009
4,903
486
83
TX of course
Whatever crazy grade braking algorithm GM uses will brake up to 3K+, but Ive only seen it once. Tthats part of the reason the LBZs tac is different then the rest. GM got tired of calls from freaked out owners that their trucks where turning that kind of rpms.