Joey Forbes

stock 1996 Caprice LT1 with minor mods.

I'm going to get my PCM tuned but I need more suggestions on what I should get done. here's a list of what i have planned so far.

93 octane tune (what do you guys think of this?)
delete smog pump
delete rear o2's
lower fan turn on temp
change shift curves
change shift pressures for firmer shifts
etc.

ZFreie

93 tune is free power, just don't put in cheap gas and beat on it, while the knock sensor should catch it, I wouldn't risk it.

I deleted all my emissions for sake of clean engine bay, and no emission testing where I live, can't say I've missed them. lol

I don't have rear 02s (95) so can't help there.

Lowering the temps for the fan wont do any good unless you put a different thermostat in. Lots of debate on if it does any good. That being said I have a 160 in my car.

I had the shifts made a little bit firmer on my tune, and I love it. Kick downs are a lot better to.

My .02.

LSWHO

iTrader: (1)

Who's tuning it?? You might ask them.

I'd be weary of a mail tune. I had 10 degrees of knock from one. Ten.

ZFreie

Holy crap 10...how far advanced was the spark table...?

Joey Forbes

I was thinking PCM performace or PCM 4 less

ZFreie

I have a madz28 tune for an fyi, Car has yet to blow up lol

02v8ta

iTrader: (8)

Good to know since i just got mine installed from them, Runs good.

LSWHO

iTrader: (1)

I don't know what the deal is, but my 2000rpm range needed to be pulled down a significant amount. I had to stop tuning and logging due to the summer heat and no A/C... I'll check now...

ok so -12 degrees at 85map, 2000rpm. stays around -9ish until 4000 then -8ish down to -3 at 5000 rpm. Then I've added 3,4,5 degrees at 6000+

To be fair though, my tune is also below stock timing tables by about half those numbers.

When I get back into it I need to pull more in the even lower RPM range and may be able to add timing back in, but it won't be a ton. I still run a solid 2 degrees of knock the entire run, so I have plenty of work to do. AZ sucks.

Joey Forbes

i still have no idea what i should get done.

ZFreie

Mines been on the car for close to two years and around 15k miles. Still runs like a champ.

Yea I'd wager AC is pretty much needed, plus the heat isnt gonna help your performance any either.

If you have the money, and can find a good tuner that will touch an lt1, nothing beats a dyno tune.

LSWHO

iTrader: (1)

yeah anywhere from 103' - 117' and 30' humidity necessitates A/C.

I would also say that a street/track tune are better than a dyno tune or even better a VERY WISE supplement to a good dyno tune.

ZFreie

Hence why I said good tuner. A good tuner wont just toss it on the dyno, make two wot pulls, and call it good. They will take the time to fix everything else including wot. I was just saying, a dyno/street(w/e you wanna call it, if i had my car dyno tuned and all they did is touch wot tables I would rip them a new one...) tune is gonna be better then ANY mail order tune. To many variables to account for in a mail order, they can get them close but not perfect.

And screw that noise, and to think, NH summers are awful for me lol no AZ for me.