MAF vs. SD

[Mike Rolica]

Yep your configuration, apyu, is vats requires a 2000 pulse per mile vss
input (open collector ,ground, open collector , ground..ect)  I know I just
when through this with my 165 and the same broadcast code apyu.  You can
make a vats bypass module like I did if you want to go that route, it costs
about 5 bucks to make and work fine.  An optical pickup off of a 85, 86
blazer or s10 with cruise works good.
If you want I can send you the stuff you need for a vats bypass box part
num. wire diag etc.  Involves couple capacitors 555 timer, npn transistor,
and couple of resistors... I used one variable one to fine tune it.
Mike Rolica
EXT. 260
 :-)


-----Original Message-----
From:	Bob Valentine [SMTP:bob at tecmark.com]
Sent:	Tuesday, October 12, 1999 11:53 PM
To:	gmecm at efi332.eng.ohio-state.edu
Subject:	MAF vs. SD

Thanks for all the replies about what to do for a VSS.... seems I've got
plenty of solutions now.   Big question now is still do I keep the '165 and
stay MAF, or try and get a '730 and go SD.

>From what I've read so far, SD seems to be more tuned to the exact
application so it would reason that I'd be better off with MAF since the VE
of my motor is probably nothing like a Chevy motor, much less my
displacement is higher and my intake volume/config is nothing like a TPI.

Also, is the current cal I have VATS?   ('89 165, APYU cal)

Is there a problem bypassing the heater connections on the IAC body on a
TPI throttle body?   This installation's pretty ugly as it is.... if I can
leave that off it would make life easier.   


--> Bob Valentine
--> bob at tecmark.com