News:

New Users: Send [email protected] an email with your account name. I've turned off auto-approve to reduce the 100 new spam accounts a day. Thanks, -Jason

Main Menu

Tachometer Output - Divider Question

Started by Slow_Audi, September 08, 2020, 05:48:09 PM

Previous topic - Next topic

Slow_Audi

What should the tachometer divider be for a 36-1 crank wheel? Having trouble understanding the tachometer divider. I'm sure I could dial it in with my scope and guesswork but it would be preferable to understand the theory. Thanks in advance.

Kamuto

no, your trigger have no relation with tacho pulses, only cylinder number does
Vems installer in Lithuania
[email protected]

Slow_Audi

Thanks, I've been trying to 'backwards engineer' numbers but nothing makes sense. What do these numbers mean in the divider area? Are they call out for a script or are they the actual integer involved in the math?

jrussell

A divider of 16 is 1:1 mapping. 1 pulse per revolution. That allows adjustment up or down if you need to do something weird such as use a 8cyl tach on a 4cyl engine, etc.
VEMS USA - Located in beautiful Burlington, Vermont
1988 RX7 Turbo