smooth1990

I have a supercharged 1992 383 Lt4 corvette and I am going to learn how to tune the car when needed!

Its kind of scary considering I am completely new to the tuning world! I recently bought the Ostrich 2.0 and cables. i also have the cable for datalogging using Datamaster. For tuning software i am going to use Tunercat RT.

The tune in the car now is a 2 bar that was put together by a guy with a chasis dyno last year. It is ok in the sense that the car runs good and makes decent power but he has it set so it never goes into closed loop and the Knock sensors disabled.

I have been playing around with tunercat and I got the basics down. I would like some advice from you guys.

Cliff Harris

You need a wideband O2 sensor to tune effectively. The basic procedure is to look at the AFR and then adjust the fueling tables to bring it to the desired value. Make adjustments as percentages. If the AFR is 5% rich, lean out the tables by 5%. Watch out for coolant temperature. The fueling tables are based on coolant temperature, so you need to keep track of which table you're adjusting.

smooth1990

I do have a wideband on the car. By fueling tables, You mean the volumetric efficiency or VE tables?

Jay7199

Im right here with you, supercharged 93 with a hotcam, Perhaps we can help each other along the way.

smooth1990

Sounds good to me!

Jay7199

Could I take a look at your current tune? Im starting from a stock tune, looks like you are ahead of the game with a tune to drive around on, I dont think mine will even idle after I went from stock injectors to 57lbs

smooth1990

The tune I have is a 2 Bar map. To run it, you would need the proper definition fille and swap to a 2 bar map sensor!

What do you have for a fuel system in your car? stock long block? supporting mods? How many psig?

Jay7199

Swapping to a 2 bar map sensor probably wouldnt be a bad idea but right now I will only be running what the vortech kit produces ( should be 7psi i think ) and its a stock long block with a LT4 hotcam, alexs valve springs, EWP, 1.6 rockers.

smooth1990

Have you spoke with greg@blowerworks? The man knows his stuff and is a huge help! i have his 8 rib conversion and a few other things. he is also going to help me with the tune on the car!

Jay7199

I was thinking about sending him a email about how much he would charge for a base tune but not sure yet, He does great work though iv seen his kit on another 93 vette thats local to me, its so much better then the factory vortech kit.

smooth1990

He does! Highly recommended from me! just a great guy.

He would probably sell you a tune and work via email with you to perfect it if you have the software.

Aardwolf

I did the same! There is a lot to learn. bjankuski is in the area and can do dyno tuning if it proves difficult.

smooth1990

Where is he from?

Aardwolf

He lives by Road America and uses the West Bend Dyno shop. He's active on here and I would recommend Brian for any tuning/car work. He's a great guy!