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Tuning / Diagnostics -- engine and transmission Tune and diagnostics for engines and auto transmission.

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Old 10-27-2012, 09:16 AM   #1
tramtwo


 
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1LE specific tune?

Any of you tuners haves something in the works? Will a 1le specific tune even be necessary... I mean because of the MN6 transmission and final drive ratio of 3.91 being different than the SS?
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Old 10-27-2012, 12:48 PM   #2
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Theres nothing unique about an LS3 with 3.91 gears.
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Old 10-27-2012, 12:58 PM   #3
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Quote:
Originally Posted by Synner View Post
Theres nothing unique about an LS3 with 3.91 gears.
So the different gearing ratios because of the MN6 transmission is irrelevant to a tune? That cant be right, can it?
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Old 10-27-2012, 01:03 PM   #4
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The engine needs an optimum tune at whatever rpm, theres a couple things that need to be changed for rear gears but its no different on the 1le than on any other camaro with a change.

Tranny gearing will change the rpm the engine is at for a certain speed, the optimal tune for an engine at a given rpm isn't altered. People just need to be smarter about cam changes that kill the midrange for their dyno queens.
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Old 10-27-2012, 01:04 PM   #5
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Since their is less load on the low rpm due to the torque multiplication factors involved you could probably get away with a little more timing on the bottom end, this is a question for the tuners out there as I am no tuner just my thoughts from being around this stuff for so long.
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Old 10-27-2012, 01:21 PM   #6
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Quote:
Originally Posted by Synner View Post
The engine needs an optimum tune at whatever rpm, theres a couple things that need to be changed for rear gears but its no different on the 1le than on any other camaro with a change.

Tranny gearing will change the rpm the engine is at for a certain speed, the optimal tune for an engine at a given rpm isn't altered. People just need to be smarter about cam changes that kill the midrange for their dyno queens.
Thanks for your reply.
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Old 10-27-2012, 02:00 PM   #7
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Originally Posted by VR1LE View Post
Since their is less load on the low rpm due to the torque multiplication factors involved you could probably get away with a little more timing on the bottom end, this is a question for the tuners out there as I am no tuner just my thoughts from being around this stuff for so long.
Have you done the math on the gearing? The tranny and rear will mostly cancel out but I'm not sure the exact numbers. I think it's a tad higher than standard, can't remember the thread where they measured it out. It's the close ratio that is the primary benefit so no short shifting 1st/2nd.
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Old 10-27-2012, 04:44 PM   #8
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ok got it that makes sense thanks
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Old 01-12-2013, 05:12 PM   #9
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Looking to install my headers....
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Old 01-15-2013, 09:17 AM   #10
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The fact that it is a 1LE won't make the job any different for the tuner, they'd still do it the same way. Load a base program, adjust fuel trims, timing, and other small things that help with driveability, and then finish up on the dyno to fine tune the air fuel ratio and figure out what timing works best for it. As far as having different final drive ratios, that information is already part of the stock operating system, so when you read that file out it's not something you have to factor in, if that makes sense.

Good luck with the headers, they are a nice addition to any LS3!!
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