Stock PCM limits?

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Feb 1, 2002 | 08:20 AM

GeorgeC

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From: Melbourne, FL

Stock PCM limits?

Anyone know for sure just how far RPM wise the stock PCM has fuel/spark tables for? I've been hearing 7500rpm, but I not 100% sure on that. It's mostly just a curiosity thing, but I do wonder how high an LS1 can rev without going with an aftermarket PCM (Motec, Holley, etc.)...

Feb 1, 2002 | 08:55 AM

Ryan K

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Re: Stock PCM limits?

The tables I am sitting here looking at stop at 8000 rpm. Now I am not saying that I have tried it, but thats how far the tables go!

Ryan <img src="gr_grin.gif" border="0">

Feb 1, 2002 | 10:16 AM

GeorgeC

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Re: Stock PCM limits?

Cool... Thanks for the info Ryan. I may be buying LS1-Edit for myself soon. <img src="gr_stretch.gif" border="0">

Feb 1, 2002 | 10:58 AM

Pro Stock John

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Re: Stock PCM limits?

Ryan, how high can you set the shift points?

Feb 1, 2002 | 01:40 PM

Ryan K

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Re: Stock PCM limits?

the shift points are based soley off of MPH, so, you could setht the shift points at any MPH you want. For example, my 1-2 shift at WOT is currently at 34 mph (I think) and for me that equates to approximatly 6400 rpm. The 2-3 shift is set for 66 mph, approx. 6300 rpm.

Ryan <img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />

Feb 1, 2002 | 01:47 PM

Pro Stock John

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Re: Stock PCM limits?

Yeah last year with my 346ci motor it was supposed to shift at 40mph and 80 mph for 1-2 and 2-3.

Feb 4, 2002 | 05:24 AM

pugs

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From: Illinois

Re: Stock PCM limits?

Wow...They give you some room to rev eh?

OBD1 LT1 tables go to like 7

And OBD2 goes to like 7200.

I hear they just keep using the values in the last table up to 7500...but that is also where the PCM stops being able to keep up. It cant sample/send signals any faster.