ZR-1 DIS

[Bruce Plecan]

-----Original Message-----
From: Guenther,Max <Mguenther at ASCO.COM>
To: 'diy_efi at efi332.eng.ohio-state.edu' <diy_efi at efi332.eng.ohio-state.edu>
Date: Wednesday, March 10, 1999 12:00 PM
Subject: ZR-1 DIS

Toothed wheel goes where?.
For DIS, you need to locate a particular engine firing, ie #1 cylinder fire,
and
use that to synch all the future cylider firings.  So you need, camshaft,
and crankshaft.  It's 45d in the distributor since it's turning 1/2 crank
speed.
Bruce

>>----------
>I've been looking through the manual for a 90 Vette, especially the ZR-1
>section.  They use a DIS system which has its own module and uses the
>same I/O from the ECU with an added fault code.  There is a wealth of
>info on this ignition but little info on the stock hei setup.
> The ZR-1 est signal is a pulsed signal which upon going from high to
>low fires the coil.  Does this hold for the L98 or stock 90'vette 350
>with a 7727?  Reference is voltage is 45 degrees high, 45 degrees low on
>the crank.
>If this is the case all you would need for DIS would be the ignition
>mod, coil packs, toothed wheel,pickup(and bracket). And some way to tell
>the ecm to divide by two as the dist system gets 45 degrees from the
>cam.?  Comments greatly appreciated!
>>Max