making the factory tach more accurate?

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Jan 7, 2004 | 05:01 AM

ITRswapandslow

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Joined: Oct 2003

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From: western NC

making the factory tach more accurate?

I'm under the assumption that the test tach lead is the same lead that runs to the factory tach...is it possible to run it directly from the ECU to get a more accurate reading?

sicne the ecu sees a more accurate reading than the test tach lead (i PROVED IT on my car with a 5", volt meter, and vafc) it just seems it's plausible to make my Si cluster more accurate.

Jan 7, 2004 | 11:18 AM

Perfectionist

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Joined: Dec 2001

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Re: making the factory tach more accurate? (ITRswapandslow)

WTF?

The tach pulses are from the distributor. How would getting the signal at the ECU make any difference?

Jan 7, 2004 | 12:03 PM

doublejz

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Joined: Aug 2003

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From: Greensburg, PA, USA

Re: making the factory tach more accurate? (Perfectionist)

ummm it doesn't matter if you run the tach off the blue wire or from the ecu, its gonna be the same

Jan 7, 2004 | 03:20 PM

kommon_sense

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From: NC

Re: making the factory tach more accurate? (ITRswapandslow)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITRswapandslow »</TD></TR><TR><TD CLASS="quote">I'm under the assumption that the test tach lead is the same lead that runs to the factory tach...is it possible to run it directly from the ECU to get a more accurate reading?

sicne the ecu sees a more accurate reading than the test tach lead (i PROVED IT on my car with a 5", volt meter, and vafc) it just seems it's plausible to make my Si cluster more accurate.</TD></TR></TABLE>

Are you sure? Sounds like you may have just proved that your test tach is faulty.