sffish

I swapped an LS6 into my '98 C5 coupe. What do I need done to the ECU to make the car run right? Currently the car runs but the the fueling is off. The LS6 motor is a stock motor, nothing done to it. Can I just copy over the LS6 data tables directly into the 98 ECU? Someone told me that the ECU's are different and it's not as straightforward as a copy and I would need to get the car dyno tuned. I live in Washington DC does anyone know of a tuner that can do the flash for me? Thanks.

~Josh

Call one of the (many) vendors here that offer mail order tuning. They should be able to set you up for much less cost than a dyno tune.


If I was sponsor here I would have already PM'd ya with an offer.

tblu92

take a look at my profile--i did the same thing only added a mild cam--- The LS6 has more compresion than a LS1 and the heads are so much more efficient that you wil need to take some timing out-- I would NOT copy the LS6 tune into your 98 actually the tables aren't the same--
The LS6 has a different cam too---You have to bite the bullet and have it tuned---- not neccesarily a dyno tune---unless you like to show off peak HP #'s but a street driven tune to data log your fuel--spark knock and VE tables--especially if you have an A4---the only things you may want to manually transfer to your 98's ecm would be as a starting point the LS6-- VE tables---desired airflow-- base spark -- comm. open loop table---idle rpm---