Help me with Tunercat

[caseycallender]

I just put a Lunati cam, Complete new top end with LE2 P&P Heads, new rings, rehoned cylinders, new opti, new wiring harness, new sensors, new bearings, pretty much a complete engine rebuild with better heads. I bought Tunercat+Data Master to do the tuning, its confusing to me though. Is TunerCat going to let me just plug it in to the port under the dash and rewrite the configs in the ECM or am I going to have to do the whole EPROM thing described in the quickstart guide.

[steveo]

you're good, just plug it in, read the old bin, make changes, write the bin to the ecm

removeable eeproms are a '93 thing only

[steveo]

which lunati cam did you get, just out of curiosity?

[caseycallender]

cam is at the shop right now, wish i could tell ya. I will post all the specs at the end of the week if you want to check back, hopefully will have some dyno numbers by then too.

[steveo]

just on the off chance you got the same cam as me, we can help each other out on some tables (i still have to tune mine)

[caseycallender]

Ooh that would be sweet,
Eventually i plan on having a file for performance, one for daily driving, and one for gas milage. Dont know how well it's gonna work or how well the stock ECM is going to hold up switching back and forth between tunes, but im gonna find out... I will keep this thread updated when I get my tune done this week for ya.. I think the machine shop guy is going to do the first tune for max HP and Torque, then I will just take that one and modify it for the rest of the tunes, have you done any tunes yet?

[cocobolo95]

When the tunercat forum at Monodax Homepage - TunerCat OBDII Scanner and Data Logger - MXScan Info- comes back alive, you should be able to find some tunes for cars with similar mods so you can download and see what changes other people have made to the stock tune.

[95 Firehawk]

A4 or M6? All three of those tunes will be the same tune for an M6. Not sure about the A4 tune though(I'm an M6 guy and have never done any research into the A4 portion of tuning).

Max power will be tuned in PE mode for optimum performance at WOT, which shouldn't be leaned out for any other reason. And if you want maximum gas mileage while cruising, you can command a slightly leaner AFR, but when would you want a "daily driver" tune that isn't for fuel economy?

IMHO, one good tune is all you need. If you do go with a slightly leaner AFR emissions will be impacted. Therefore if you need to pass an emissions test, that would be the only other tune I'd have (if your normal tune won't pass).

[steveo]

flashing hundreds and hundreds of times will probably kill your flash memory. there is trickery to achieve dual mapping of sorts even on the stock lt1 pcm, if you really have to do it.. (and you dont)

[Mystery Bird]

I agree with 95 Firehawk, only one GOOD tune is needed.

[caseycallender]

If I only do one I get bad fuel economy always though . Might have to wait and get an aftermarket PCM or something.

[Mystery Bird]

How do you figure? Your right foot will determine your fuel economy more than anything. I'm getting 19+ MPG cruising and running low 11's at the track. If you're worried about fuel economy don't mod your car then.

[95 Firehawk]

...as Mystery stated one GOOD tune.

[caseycallender]

Well I was trying to get the best of both worlds trying to figure out the best way. it is going to be my daily driver so that's why I'm not going any further with the motor then I got already. If I can squeeze 19 or 20 mpg, with one tune that would be badass.

Update on the car though, block got sent to the machine shop a week ago, it's going to be 7-11 days before they get it done, they got a line in front if me.


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[cocobolo95]

Don't expect the best gas mileage right after you get your car back on the road. It takes awhile before all those new tight parts loosen up enough for optimal mileage.