LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1 tune?

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Old Mar 23, 2010 | 09:55 PM
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Default LT1 tune?

what handheld tuner can i buy to tune my s/c LT1? or should i just go ahead and spend $400 for a dyno tune?
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Old Mar 23, 2010 | 10:02 PM
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Wow..
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Old Mar 23, 2010 | 10:04 PM
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WOW is right...you spend all that money on a supercharger and you want to use a hand held tuner. Please don't
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Old Mar 23, 2010 | 10:22 PM
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That kind of stuff needs to be done in person, up close and personal. Even some bigger N/A builds need to be done in person and spending time watching and recording data then adjusting. Spend the dough.
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Old Mar 23, 2010 | 10:58 PM
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Anytime you have a serious build like that a mail order tune should be done...and then when you get a chance get a dyno tune. Some places will do a base tune for you to make sure the car actually runs decent enough to get it on a dyno and further dial it in. It's not always easy to get a mail order tune spot on with lots of mods. So many things go into tuning that you need someone to take the time and get it just right...not always but most of the time that's the best plan. A hand held tuner will not get you what you need.
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Old Mar 24, 2010 | 12:38 AM
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Speaking of tunes, if you opt for the PCM for less tune, but dont want to send in the pcm, it seems they have an option to put a tune on a chip and send it to you?
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Old Mar 24, 2010 | 09:36 AM
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Originally Posted by BigBadWhitey
Speaking of tunes, if you opt for the PCM for less tune, but dont want to send in the pcm, it seems they have an option to put a tune on a chip and send it to you?
only 93's use chips but it is possible to have them email you the tune then you need a cable to plug into the OBD port, course you can always pay the deposit and they'll send you a pcm pre-loaded then you return yours and get your deposit back.
BUT if your blown and thinking about having pcmforless tune your car...
READ THIS THREAD 1st!!!!> https://ls1tech.com/forums/lt1-lt4-m...e-reveals.html
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Old Mar 24, 2010 | 11:22 AM
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Go trifecta or mad z i think is the other. they send you a tuner and you just plug it in to your diag port and upload the tune they make for you. Then you can data log it and send it to them and they can check it to make sure it is right. I am doing Trifecta preformance tune right now. No taking the PCM out and no mailing it away. PCM's for less needs to get with the times.
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Old Mar 24, 2010 | 02:02 PM
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Im in canada, so im not sure if trifecta will send me one. Lol.
Are you finding it works well so far?
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Old Mar 24, 2010 | 02:49 PM
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Buy TTS Datamaster, TunerCats, Cable, and a Tune.

You can then collect data to enable the distant tuner to correct the tune, you will be able to see what was changed (observe fisherman), and immediately learn how to change the tune in your car.

Then you will have a tune that is Safe and can go to dyno to refine IF you want, or if you listen and observe the changes you should be able to ask questions and receive advice and then do your own tuning (feed yourself fish).

Boosted is NOT the easiest to learn to tune, but SC is the easiest boosted soo...

I strongly suggest a 2 Bar Speed Density tune. If the person tuning can't do Speed Density then find someone who can and HAS done it before! FEW tuners can do it and should be a REAL hint on how talented they are.

2 Bar map will allow tuning the timing and fuel accurately up to ~15 psi.

Good luck
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Old Mar 24, 2010 | 02:54 PM
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Your next question will likely be..Where do I find and buy a 2 bar MAP?

There are many sold on Ebay I think I paid ~$50 last month with connector.

Next question is why do I say SC is easier to tune? Answer boost is predicatable at an RPM the charger will make roughly the same boost.

A turbo by contrast can make max boost or min boost at almost any RPM.

Good luck
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Old Mar 24, 2010 | 03:32 PM
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i just got this car, it already had the supercharger on it. and i was told it hasnt been tuned since its been rebiult. i traded my stock LS1 with 200k for this s/c TA with 93k miles, but i havent drove it one day without something ******* up yet. now i have a oil leak the size of texas coming from god knows where
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Old Mar 24, 2010 | 04:01 PM
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check the back of your intake manifold, probably the pass side by the egr
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Old Mar 24, 2010 | 06:03 PM
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it was the pcv valve hose, i had the elbow in the valve cover and it didnt have a pcv vavle
Which was causing oil to go into my throttle body, intake, and intake piping and down into the supercharger, now my car smokes like crazy and i gotta burn it all off i guess, can suckin up all that oil mess anything up?
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Old Mar 24, 2010 | 08:57 PM
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Spend the money on a dyno tune,but who did you find that will tune a lt1 in person??Is the trans still shifting funny?
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Old Mar 24, 2010 | 10:08 PM
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nah, i dropped it down in 2nd the other day and shifted into third and it shifted ok. and Carolina Speed Shop in Conway SC said they could tune it.
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Old Mar 24, 2010 | 10:58 PM
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dyno tune that ****
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