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Going to use LM1 but no rpm converter.

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Old Jul 22, 2007 | 02:31 PM
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Steve40th's Avatar
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Going to use LM1 but no rpm converter.

I am going to be useing an LM1 a friend at my new work has. My question is, is the data really valid if no rpm etc is with it?
Can I sync up my TTS Datamaster and hit "record" at the same time and ge a good idea of what it is doing?
Alvin did a fantastic tune on it(but I never had wideband for driving around and WOT((WOT was done on dyno and was I believe 12.7 to 1)), and now that I found my vacuum leak at my IAC, I want to drive with the LM1 and get valid data that can be used to fine tune the Vette?
1993 LT1 with 396 cu inch engine.
Thanks in Advance.
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Old Jul 22, 2007 | 10:52 PM
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From: Corona
Car: 92 Form, 91 Z28, 89 GTA, 86 Z28
Engine: BP383 vortech, BP383, 5.7 TPI, LG4
Transmission: 4L60e, 700R4, 700R4..
Axle/Gears: 3.27, 2.73
Re: Going to use LM1 but no rpm converter.

I find it's easy to sync, if there's a few DFCO points at the beginning and end of the logs. I think the LM1 time scale is out of whack though, so recreate it with an equation, and tweak the scale interval until it fits your other data. Or just stretch separate graphs to make it all fit evenly.
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Old Jul 22, 2007 | 11:14 PM
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Re: Going to use LM1 but no rpm converter.

thanks
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Old Jul 23, 2007 | 05:11 PM
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Re: Going to use LM1 but no rpm converter.

The LM-1 and the factory ECM dont record at the same rate so the data wont line up unless you make some sort of adjustments to it.
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