Chicago Crew Thread #2

[Turbodrvn]

Originally Posted by EVILTWIN

Id say by next year, once everyone is tuned up, the chicago crew is going to tear up import wars, and start making some people take a second look at the 3000's and Stealths.

people are always taking a 2nd look at my 3/S, especially my tail lights!

[Turbodrvn]

Originally Posted by iceman_ii

I have a hell of a question....

at a given boost level, for arguments sake 14psi, I am getting knock above 6200 rpm.

I have a choice between:

1. Turn down the boost
2. Richen it up above 6000 (where it runs like crap)
3. Run race gas (not always available)
4. Short shift at 6000 to drop the RPM in the next gear below the knock threshold.

What are you guys' thoughts on option 4?

You definitely need to pin point this problem. I first double check your entire fuel system; start w/ the Super AFC and richen up at the 6,000rpm mark and see if it goes away. All settings on the SAFC should remain consistent; if you find that you have to richen as the rpms climb, then chances are there's a fuel issue somewhere? I'm sure you've done the the fuel pump re-wire, but check the volts. injectors?, fuel pump going bad? just some ideas........

if you have to shift below 6,000rpm to avoid knock, you'll be missing your most powerful threshold on these cars.......they shine at between 6,000 - 7,000rpms.

hope that helps.

[EVILTWIN]

i agree, but while its knocking, and you havnt exactly figured out the question, turning the boost down wouldnt be a bad idea. No need to cause something else to go wrong while you are troubleshooting and getting high knock.

[iceman_ii]

Its not a fuel issue, pump is big enough, injectors are big enough (70% DC), and O2s right where they should be (.94). I think I am just oustripping the octane rating of the fuel I am using. What I am asking is:

If turning down the boost = performance reduction across the whole RPM range
And short shifting = loosing the performance in the "sweet-spot"

Then does lowering performance on whole RPM range make up for losing the perfromance above 6000?

[Turbodrvn]

Originally Posted by EVILTWIN

i agree, but while its knocking, and you havnt exactly figured out the question, turning the boost down wouldnt be a bad idea. No need to cause something else to go wrong while you are troubleshooting and getting high knock.

Yeah, definitely keep the boost down til you figure this out. Or continue to use 100octane (heck it's just a little more expensive than premium nowadays). I'm assuming the knock goes away w/ race gas, right?

But I thought you had another "race gas alternative", Scott?!

[EVILTWIN]

id say boost down with less knock, may equal the same performance as more boost with high knock. correct me if im wrong.

[iceman_ii]

Originally Posted by EVILTWIN

id say boost down with less knock, may equal the same performance as more boost with high knock. correct me if im wrong.

Not quite... remove knock from the equation, because all knock is bad... Then the question becomes,

Is the HP generated with lower boost with higher rpm less than or greater than that created with higher boost with a bit lower rpm?

I think it may become a question of just how quickly a given turbo spools, if you look at a HP curve, they kind of plateau, if you can upshift, and not fall off the plateau, I would think lower rpm higher boost would be the higher horsepower alternative.

[GT711]

Maybe one of you guys can offer me some advice.

I have a '95 3000gt SL and it has about 55k miles on it. I have only had it for about 3 months and have baby-ed it so far. I was on my way home to Cary and the automatic trans went out on me. I know that auto trans's in mitsu's are probably their most noted weakpoints, but this is ridiculous. I'm sure that is part of it, and the guy who owned it before me must have beat the shit out of it. Anyways, now I am stuck replacing this crap. Switching to a manual is not an option, I am looking to rebuild with a little bit stronger parts than stock. Well so far just about every trans place I've called has jacked me around telling the trans is crap and that they won't warranty the crap. Can anyone suggest a "reputable" shop that they know/work for, maybe even one that specializes in mitsubishis/imports that won't treat me like a retarded step child and can give me a fair price and a warranty? Help guys, I'm screwed enough paying for this crap without being told I'm going to have to bend over and not get a warranty. Thanks.

[iceman_ii]

Originally Posted by GT711

Maybe one of you guys can offer me some advice.

I have a '95 3000gt SL and it has about 55k miles on it. I have only had it for about 3 months and have baby-ed it so far. I was on my way home to Cary and the automatic trans went out on me. I know that auto trans's in mitsu's are probably their most noted weakpoints, but this is ridiculous. I'm sure that is part of it, and the guy who owned it before me must have beat the shit out of it. Anyways, now I am stuck replacing this crap. Switching to a manual is not an option, I am looking to rebuild with a little bit stronger parts than stock. Well so far just about every trans place I've called has jacked me around telling the trans is crap and that they won't warranty the crap. Can anyone suggest a "reputable" shop that they know/work for, maybe even one that specializes in mitsubishis/imports that won't treat me like a retarded step child and can give me a fair price and a warranty? Help guys, I'm screwed enough paying for this crap without being told I'm going to have to bend over and not get a warranty. Thanks.

Call Jim or Jeff from "Milwaukee Mopar Motorsports", buy the part from Kormex (or somewhere where they warranty the part) and have MMM install it for you, you will not get a more fair price.

you can PM jeff at "440 4X4"

[GT711]

Originally Posted by iceman_ii

Call Jim or Jeff from "Milwaukee Mopar Motorsports", buy the part from Kormex (or somewhere where they warranty the part) and have MMM install it for you, you will not get a more fair price.

you can PM jeff at "440 4X4"

Thanks for the suggestion, but anybody know anyone a bit closer to the Crystal Lake/Schaumburg/Palatine area? Milwaukee is a bit of a hike, especially if there is any warranty work that has to be done later on.