Doing a lot of research I cannot find an exact answer some say it will brick for sure and others say that the efi list isnt correct and have done some swaps not listed.
What I have is a 2007 tahoe with a lsa blower running 14 psi and just went to 1000cc injectors for e85. I have done a 6l80e swap to it and with the 4l60 was using the 2 bar os but had so many weird issues with shifting and going into reduced power mode p0606 codes so I put it back to the normal vve os and a lot of it went away. I did this preparing for the 6l80e swap knowing the possible headache I might have if that trans was having the same shifting issues. Its like I would lose my torque signal it would go from shifting normal to slamming out of the blue. It was very random and would do it for maybe 2-5 shifts or the whole day maybe a full key cycle or just the 1-2 then be fine on the 2-3 and rest of the drive.
So with going back to the normal os everything calmed down and was good until I did my swap to the 6l80e and as I am still messing with the tune the 6l80e is pretty good and no major issues.
So now I put 1000cc injectors in it and I tried to go to a card (ls7) maf and 4 inch housing re scaled it and did the ole double stoich for the injector tables and truck runs great. BUT as I had rarely floored the truck in fear of tearing up anything I didnt realize how quick I would run out of maf even on the larger tube setup. I really hoped that going to this larger tube would give me more range and it dropped the hz over 1000 at the same rpm but now Im on the 512 limit at 5000 rpm even though its only at about 9800 hz. Its weird as the hz went lower the g/s hit a limit quicker. Im guessing the larger tube is flowing more and made a substantial gain in hp and tq. On my logs its up a lot on flow at lower rpm so guess the stock plastic maf was a big restriction in this setup.
Anyway as I had so many issues running on the 2 bar os I am hesitant to go back to it now to get the maf resolution I need. I didnt expect it to run so well on the injectors and thought was going to really need the 128 limit of the 2009 os but thats not an issue on the double stoich setup it runs better thne it did on the stock lsa injectors no random hesitation as it had before which I have read is the stock spray pattern possibly hitting the adapter plates. So many say dont run a stock lsa injector with plates and see why now.
So its swap to a 2009 os if that is even possible or go back to the 2 bar os and hope I dont run into all the same shifting issues as I had before and random reduced power that left me stranded more then once hoping it would reset and drive good again. Also if I was able to do this I get a better os for the 2009 tcm on the 6l80e too as I would have to match that up to the ecm and the 09 truck has some tables I dont have on the current 2007 6l80e os. I have tis access and a mdi2 so I can do all this at home its just do I fry my ecm in the process as I do know my tcm will take the 2009 just not sure on the ecm.
I have read the other cars have had issues like the corvette trying to swap os but I havent seen info on the trucks or suv or anyone speak of it. I guess not that many of us trying to push 600 plus hp from a tahoe.....lol
On a quick note this thing flys with the 6 speed vrs the 4 speed. the gear spread being so good you dont have that fall off and a 373 gear with a 33 inch tall tire with the low first gear 0-60 comes at a sports car pace rather then 5.7 as it did with the 4 speed. I picked up a solid 1-1.5 seconds on it. I have also destroyed two yukon posi in the process so hoping this detroit locker can hold up. I intended this project more for just to be fun and tow my camaro well and be strong and it has turned out to be a very fast setup even at the almost 6000 lbs it probably weighs. I have pissed off a few new 5.0 and srt8 with the truck. I just want it to be get in drive and dont worry and be a good daily so keeping miles of the camaro.
I went more into detail as get a lot of people asking about the swap so as not everyone trying to answer will need all this crap I wrote it might help others decide on a possible build. This lsa blower was built to go on a 5.3 it works so well hell on a truck as the torque makes you forget your in something heavy.
thanks to anyone to shed light on the os questions or just suck it up and go back to the 2 bar os and deal with what ever happens.
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