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Engine Specific Info and Questions => IDI Engine => Topic started by: cpv on September 18, 2008, 12:15:18 pm

Title: alternator reading for RPM
Post by: cpv on September 18, 2008, 12:15:18 pm

Hi, i had to recently swap my accesory transmision from a V belt to a 6PK from AAZ, in order to fit the AC compressor, and now the new alternator from the AAZ is speenig faster because it has a samller pulley, and as a result the Rpm reading is much higher on the dash,
can the dash be calibrated or the only way is to fabricate a new 6PK pulley with the correct diameter?

Title: alternator reading for RPM
Post by: Smokey Eddy on October 01, 2008, 12:26:04 pm

If you're exceptionally good with electronics i've heard of geniuses making a converter chip where it recieves the frequency from the W and then just multiplies or divides it accordingly. But ... there is an enormous amount of know-how involved with that.

Title: alternator reading for RPM
Post by: Smokey Eddy on October 01, 2008, 12:42:45 pm

That sounds a heck of a lot easier :P

Title: alternator reading for RPM
Post by: allsierra123 on October 01, 2008, 03:24:36 pm

Will the W post on the alternator work with the gas Tach? It looks as If I have one on my alternator.

Title: alternator reading for RPM
Post by: gigaz2 on October 01, 2008, 03:43:47 pm

you can find instructions on how to convert gasser tachs to work on the W signal

Title: alternator reading for RPM
Post by: Smokey Eddy on October 01, 2008, 05:00:54 pm

THAT is what i was refering to with the electronics and what not.
I'm trying to make an aftermarket tach convert to a W signal.
If you have a VDO one people on here have definately posted invaluble guides on converting them.

Title: alternator reading for RPM
Post by: allsierra123 on October 01, 2008, 05:37:07 pm

I was just going to use the dakota signal converter box looked a lot easier.