DIY_EFI Digest Friday, September 10 1999 Volume 04 : Number 517 In this issue: O2 seor placement. Re: DIY_EFI Digest V4 #516 Re: cruise control servo - GM type See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 10 Sep 1999 09:29:39 EDT From: ECMnut@xxx.com Subject: O2 seor placement. Re: DIY_EFI Digest V4 #516 I have put a heated O2 sensor way down on the header collector of a 396 Camaro with no problem at all. Was tempted to try it a few meters further back, but didn't wanna poke the hole in the new pipes. Don't know about the one-wire sensors. That might be tough. The heated 3 wire bosch should work without a problem. Also resists lead contamination better than one-wire, if that is an issue. HTH Mike V << Does any one know how far from the exhaust valve the O2 Sensor can be placed. Due to restrictions I can place it : 1) About 1 pipe meter length from the motor (exhaust valve), 2) About 1.8 meters from the exhaust valve and after the muffler. This will however be within 200 mm of the open end of the exhaust pipe. Perhaps some power boat people or Hot Rod fans have tried different location? The Exhaust pipe is on the outside of the car and the reasons are aesthetics. >> ------------------------------ Date: Fri, 10 Sep 1999 09:57:57 -0700 From: Will McGonegal Subject: Re: cruise control servo - GM type For a while we used the stock GM electronic cruise control units to do throttle control while testing engines on dynamometers at our lab. The unit has a stepper motor (3 phase) and another solenoid to engage/disengage the stepper motor. This is handy if you need to disengage the stepper and close the throttle quickly. We didn't use the built in brains (which normally accepts a pulse speedometer input, resume, brake, coast, accel inputs), but tapped into the stepper directly to control the throttle cable. It worked OK, but was a bit slower than we really wanted. I don't think it costs much, around $200, but I'm not sure, Someone else purchased the units. The wiring diagram form a GM manual specifies what the input are if you choose to use the GM on board brains. Will McGonegal Emissions Research and Measurement Division Environment Canada ------------------------------ End of DIY_EFI Digest V4 #517 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".