DIY_EFI Digest Wednesday, October 6 1999 Volume 04 : Number 563 In this issue: Re: DIY_EFI Digest V4 #562 Re: DIY_EFI Digest V4 #562 See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Tue, 05 Oct 1999 16:17:25 From: Bob Tom Subject: Re: DIY_EFI Digest V4 #562 >Date: Tue, 05 Oct 1999 13:33:12 +0100 >From: Ade + Lamb Chop >Subject: How completcated does Efi HAVE to be? > >I am into minis, something a lot of americans probably won't have even >heard of never mind seen! Up until recently minis had single point throttle >body injection. You can pick up the inlet manifold, throttle body with the >following sensors, The system is a MAP system. I was just wondering how few >sensors I need to make it work. Make my own ECU and keep it simple. >Calibration would be done on a dyno using a lap top. No need for a Heated >o2 sensor, don't need it to learn really. There is a EFI Control System called the Alpha-N which calculates air flow by measuring only engine rpm (via coil) and throttle position via a Throttle Position sensor. Pros are simple installation and compatible with radically- cammed engines. Cons are no closed-looped operation, inferior part-throttle cruise metering and entire fuel map must be reprogrammed. A MAP can be optionally used but mainly as a input for barometric pressure for different altitudes. This system is used for racing or heavily-modified street engines with big cams and low vacuum. Bob, Burlington, Ontario '97 FR CC Sport, 5.2L, 3.55 SG, auto., 15.234 @xxx.26 ------------------------------ Date: 06 Oct 99 21:29:37 +1200 From: "Tom Parker" Subject: Re: DIY_EFI Digest V4 #562 DIY_EFI Digest wrote: >DIY_EFI Digest Tuesday, October 5 1999 Volume 04 : Number 562 >Date: Tue, 05 Oct 1999 13:33:12 +0100 >From: Ade + Lamb Chop >Subject: How completcated does Efi HAVE to be? >I am into minis, something a lot of americans probably won't have even >heard of never mind seen! Up until recently minis had single point throttle >body injection. You can pick up the inlet manifold, throttle body with the >following sensors, The system is a MAP system. I was just wondering how few >sensors I need to make it work. Make my own ECU and keep it simple. >Calibration would be done on a dyno using a lap top. No need for a Heated >o2 sensor, don't need it to learn really. I vaguely think that you only need a throttle position sensor and a map sensor to do a reasonable job of EFI. However, you WILL need the crankshaft position sensor, which means you need the flywheel, transfer case and the actual sensor. As you know, these are a bummer to remove from the mini, especially in a scrap yard. Still, it is highly doable. - -- Tom Parker - parkert@xxx.nz - http://www.geocities.com/MotorCity/Track/8381/ ------------------------------ End of DIY_EFI Digest V4 #563 ***************************** 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".