LT-1 computer settings for performance
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LT-1 computer settings for performance
Who here has reprogrammed their computer for more power? What parameters did you change and what did you change them to? How much extra power/performance did you gain from it? I'm sure that the parameters for a modified engine (high performance cam, heads, headers, etc.) would be different than for a stock engine so I'm curious what the parameters should be for my engine, a stock LT-1 with no modifications. I want to get a reprogramming device for my computer but I don't know what settings should be changed and what they should be changed to. I'd like to know what to set everything to for a stock engine and also for one that has had a few mods (cam, exhaust, fuel system) done to it so that I'll have some idea what to change the settings to so that it will at least get me close to where it should be right now while it's still stock and in the future if I do some mods to the engine. Any help is appreciated.
Last edited by TheGreek!; Sep 19, 2019 at 11:35 PM.
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From: SANTA CRUZ CA
Please excuse the nit-picking, but the LT1 and the LT-1 are different engines.
I'm sure you are aware of the difference.
https://en.wikipedia.org/wiki/Chevrolet_LT-1
I'm sure you are aware of the difference.
https://en.wikipedia.org/wiki/Chevrolet_LT-1
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picking the fly crap out of the pepper. everyone knew which motor was being referenced when the question being asked regards computer settings. was the whole point of your answer simply to poke a finger in his eye ?
as far as answering the question, OP, you need to do some reading on tuning. there is no simply saying change this table, that parameter. the programming can absorb and cope with a bit of modification before it needs changed
but there is a process behind changing the computer programming and you need to understand what you are doing before attempting it.
as far as answering the question, OP, you need to do some reading on tuning. there is no simply saying change this table, that parameter. the programming can absorb and cope with a bit of modification before it needs changed
but there is a process behind changing the computer programming and you need to understand what you are doing before attempting it.
Last edited by drcook; Sep 20, 2019 at 09:30 AM.
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From: Glenbeulah Wi
This question is not easy to answer, expecially if someone has very little tuning experience.
Read this guide, it will help alot.
http://www.lt1pcmtuning.com/tips/
Read this guide, it will help alot.
http://www.lt1pcmtuning.com/tips/
Thread Starter
Pro
Joined: Apr 2016
Posts: 512
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picking the fly crap out of the pepper. everyone knew which motor was being referenced when the question being asked regards computer settings. was the whole point of your answer simply to poke a finger in his eye ?
as far as answering the question, OP, you need to do some reading on tuning. there is no simply saying change this table, that parameter. the programming can absorb and cope with a bit of modification before it needs changed
but there is a process behind changing the computer programming and you need to understand what you are doing before attempting it.
as far as answering the question, OP, you need to do some reading on tuning. there is no simply saying change this table, that parameter. the programming can absorb and cope with a bit of modification before it needs changed
but there is a process behind changing the computer programming and you need to understand what you are doing before attempting it.
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I once went to a "dyno tune" with my C6. The tuner was able to "find" ~5hp on my LS2. Not much. Earlier, he had done a '90's Firebird with an LT1 and picked up 41 RWHP. A fantastic gain, which only means that the stock tune in that car was pretty poor.
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Question is too general, need more information.
If you cannot get more air into or out of the engine, really all you can do is play with the timing with a target A/F ratio. This means you need a wideband O2 sensor and a dyno, or testing on a drag strip. In general the factory tune is conservative and safe for longevity and all conditions.
Most of the off-the-shelf stuff from Hypertech is really just advancing timing in conjunction with lowering typical running temperatures (fan settings and thermostat) to allow them to do that and not have a heavy detonation penalty to pay.
If you cannot get more air into or out of the engine, really all you can do is play with the timing with a target A/F ratio. This means you need a wideband O2 sensor and a dyno, or testing on a drag strip. In general the factory tune is conservative and safe for longevity and all conditions.
Most of the off-the-shelf stuff from Hypertech is really just advancing timing in conjunction with lowering typical running temperatures (fan settings and thermostat) to allow them to do that and not have a heavy detonation penalty to pay.
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Hard to do b/c every engine is different. The "this, this and that" are: you need to "Feed it what it wants". The food is ignition timing and A/F ratios. They're likely not optimized from the factory, so you need to put a WB O2 on it, put it on a dyno -or some way of measuring power, and then make changes until you've optimized the fueling and timing. Just like tuning a carb and centrifugal advance on an..."LT-1"...it's that simple. But it's not quick or easy. It's an arduous, time consuming project.
I once went to a "dyno tune" with my C6. The tuner was able to "find" ~5hp on my LS2. Not much. Earlier, he had done a '90's Firebird with an LT1 and picked up 41 RWHP. A fantastic gain, which only means that the stock tune in that car was pretty poor.
I once went to a "dyno tune" with my C6. The tuner was able to "find" ~5hp on my LS2. Not much. Earlier, he had done a '90's Firebird with an LT1 and picked up 41 RWHP. A fantastic gain, which only means that the stock tune in that car was pretty poor.
Last edited by TheGreek!; Sep 20, 2019 at 02:25 PM.
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A stock LT1 (1992 to 1996) factory tune is just a bit lazy on the spark advance and the shift points could be a bit higher rpm and the power enrich target at WOT is a tad rich.
That's it in a nut shell. That keeps the engine living a long life.
If you get some data logging software that will show how your engine is running right now and with the factory settings.
Most methods for performance tuning of a stock engine are data logging with wide band O2 and verifying the target air fuel is where you want it by the mass air flow meter, (MAF).
Make small changes to MAF in the PCM tune.....check trap speed. repeat.
Make sure no knock retard. Push up the spark advance a tiny bit... repeat...test...repeat.
That's it in a nut shell. That keeps the engine living a long life.
If you get some data logging software that will show how your engine is running right now and with the factory settings.
Most methods for performance tuning of a stock engine are data logging with wide band O2 and verifying the target air fuel is where you want it by the mass air flow meter, (MAF).
Make small changes to MAF in the PCM tune.....check trap speed. repeat.
Make sure no knock retard. Push up the spark advance a tiny bit... repeat...test...repeat.
Last edited by Karl Ellwein; Sep 22, 2019 at 05:17 PM. Reason: better wording