LB7 DSP5 with SAC45s, LBZ reg, Built Trans

[Lennydmaxguy]

Hey guys, thought I'd share my DSP tune with everyone. I appreciate the forum and the help I've gotten the short while I've been here, and I want to give something back.

This tune is based somewhat loosely on a few files I've downloaded from here, especially Dave's tune he posted in a recent thread. The truck it's from is the 01 federal LB7 in my signature. The most substantial mods to the truck are LDS SAC45 injectors, a Superstock CP3 with LBZ regulator, and built transmission. Otherwise, I think VATS is off, intake heater is off, maybe other details I'm not thinking of just now. The truck does have a 64 mm turbo as well, although being an LB7, there isn't really boost controls in the ECM.

I don't really have power level estimates, but I would say level 5 does close to 600 HP, maybe more. So, in other words, not even remotely stock trans safe. You could maybe run levels 1-3 in a stock trans truck and be ok, though. Level 1 is detuned from stock, to make the truck more maneuverable at parking lot speeds.

If anyone has suggestions on improvements that could be made, I'm all ears. I'm not looking to make more power with my truck, though. It's still on 265s on stock 16s, so power transfer is a problem already. There's definitely more potential in a set of SAC 45s, tho, if your truck is set up for it.

 

[TheBac]

Moved to Tune Library

 

[asemaster]

Could somebody help me out and modify this for Sac 30% nozzles. Or give me some pointers on how to do it. 2004 Lb7 sac30 nozzles, headstuds and stock trans.

 

[Lennydmaxguy]

Unless you have plans to upgrade your transmission very soon, I wouldn't bother using any of the power levels from this tune. You could try copying the stock level pulsewidth table to your truck and see how it runs. 30% and 45% aren't a huge difference

 

[asemaster]

Unless you have plans to upgrade your transmission very soon, I wouldn't bother using any of the power levels from this tune. You could try copying the stock level pulsewidth table to your truck and see how it runs. 30% and 45% aren't a huge difference

Thank you

 

[Harshman]

I just tried this tune today. Rescaled the fuel pressure regulator to LB7. I think it works pretty good.

 

[mac79]

Will this work on 02 lb7. I have same mods as you wouldn't mind trying it. If it will work.

 

[2004LB7]

Will this work on 02 lb7. I have same mods as you wouldn't mind trying it. If it will work.

It probably would. But it's up to you to compare all the tables and make sure they line up. And better to copy/paste the tables over or script it then to directly load the tune. There are potentially areas in the tune not in the tables that could be different and can cause issues. I don't remember what years it was, but there was an issue with I think fuel gauge breaking when switching between tunes. Better off copying the data to yours

 

[TheBac]

01-to-02 may not work. IIRC from 20-some years ago that 01 engine tuning was slightly different.
For a non-related example, the '01 trans tune was the old go-to for racing bc it had a different learning strategy.

If Lenny kept this unlocked, you could always take a look at what changes he made and adapt them to your operating system.

 

[mac79]

Thanks for the reply. I was just curious. I don't know if I'd ever be brave enough to try it