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PCM Diagnostics & Tuning
gear/tire size

PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

gear/tire size

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Jan 19, 2008 | 01:31 PM

#1

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From: garland tx

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gear/tire size

if i wanna get my car tuned for the 26 ill be running on the street and then run 28 a the track is there goana be a problem? meaning does it shift by rpm or mph? or what

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Jan 19, 2008 | 03:12 PM

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97+ LS1 pcm's use both rpm & mph as markers, not sure about the earlier pcms.

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Jan 19, 2008 | 04:14 PM

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From: garland tx

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im asking about a 99

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Jan 19, 2008 | 04:25 PM

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Then you've got your answer

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Jan 20, 2008 | 05:36 PM

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so what id normally its at 6500rpm and 80mph
then i switch to 28's and its 6500 rpm at 86mph

is it goana early shift with 28's?

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Jan 20, 2008 | 06:41 PM

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set your mph low & use rpm as your main marker.

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