LBZ: LBZ tow tune

[hondarider552]

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.

 

[56taskforce]

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.

 

[hondarider552]

Yes it has turbo brake.

 

[56taskforce]

I saw that in the link as soon as I made the post lol

 

[hondarider552]

Updated turbo brake tune. Makes 15psi while braking.

 

[Combine Pilot]

Updated turbo brake tune. Makes 15psi while braking.

Oooo, i like that. Mine only makes 5 psi Might have to get Steve to turn that up a touch

 

[hondarider552]

Had to blow the dust off my LBZ tuning. Havent touched a LBZ since I had mine in 2010.

 

[NC-smokinlmm]

Wow, 15 psi ought to put your face in the windshield...

 

[PureHybrid]

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.

 

[hondarider552]

98 and 99%

 

[SteveLBZ06]

thanks for putting this up

 

[PureHybrid]

wth did you use to come up with the timing maps. isn't the timing at idle speed a little low too?

 

[NC-smokinlmm]

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...

 

[hondarider552]

wth did you use to come up with the timing maps. isn't the timing at idle speed a little low too?

Why do you need a bunch of timing at idle?

 

[Dozerboy]

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]

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.

 

[PureHybrid]

Why do you need a bunch of timing at idle?

You don't, just the stock lbz tune I had was -.7 and the one posted was -2.7, unless I'm looking at something wrong.

 

[Combine Pilot]

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.

So you're saying i should fix whatever wire is broken so i can use my tap shift?

 

[Dozerboy]

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.

 

[The Neens]

You don't, just the stock lbz tune I had was -.7 and the one posted was -2.7, unless I'm looking at something wrong.

The stock B0908 is -.7*, stock B0909 is -2.7*