DIY_EFI Digest Monday, 23 September 1996 Volume 01 : Number 284 In this issue: Re: DIY_EFI Digest V1 #277 Re: self tuning efi Re: D disease Re[2]: wasted-heat RE: Tom Cloud's self tuning EFI Idea See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: Dirk Wright Date: Sun, 22 Sep 1996 09:29:38 -0400 (EDT) Subject: Re: DIY_EFI Digest V1 #277 On Fri, 20 Sep 1996, Robert Harris wrote: > Dirty little diesel secret. Propane. Since a diesel runs with an > excess of oxygen, with the right fuel, you can make more power. > Lots more power - like 25% more without busting a wrench. > (Check BI FUEL references on the internet). OK, what if you added NOS also? Cools the intake to some really really cold temperature and adds even more oxygen. **************************************************************************** Dirk Wright wright@xxx.gov "I speak for myself and not my employer." 1974 Porsche 914 2.0 "A real hifi glows in the dark and has horns." 1965 Goodman House **************************************************************************** ------------------------------ From: talltom Date: Sun, 22 Sep 1996 09:40:50 -0700 (PDT) Subject: Re: self tuning efi >From: Thor Johnson >Date: Sat, 21 Sep 1996 08:52:44 -0400 (EDT) >Subject: Re: Tom Cloud's self tuning EFI Idea > >On Fri, 20 Sep 1996, George M. Dailey wrote: > >> Tom, I think, what you are proposing is hardware and software that will >> dyno tune the engine as you drive. Kinda like having a personal staff of >> performance engineers in a black box to continuously search for that state >> of "ultimate tune" for your hot rod. > >> I would be interested in exploring this futher. It is certianly possible >> with todays off the shelf components. This would be a DIY'ers dream come true. > > I'll keep lookinghere for ideas/sensors/methods. This is what I hope >to accomplish with my homebrew engine mgmt system for FSAE. I think the >limiting factor (as tuning speed goes) will be response of the sensors - >I've head that O2 sensors can take up to 1sec to responsd... can someone >comment on this? (seems to be the slowest sensor...) > > I thought I was the first one to bring that idea up! Oh well. My expierience with o2 sensors sez they're much faster than that. I've even heard of ideas of calculating the time and firing order in such a way as to get an o2 reading for each individual cylinder(we're talking two sensor v8 here) so mixture could be varied from cyl to cyl. Course if outfits like Chevrolet and Kinsler made their ports symetrical that probably wouldn't be necessary.(Oops, I see the latest chev small block figured this out, even went to the smooth firing order!) I believe some manufacturer may be already be doing this. The way I understand the workings of an o2 sensor, one wouldn't think they could be very fast reacting, but they sure as heck seem to be. Sorry I can't get any more specific, but sometimes the impression made on the ahole is what counts most. Maybe I should also add that being a poor dumb sob means that no video camera is available for the guages on a run so I usually get the job of watching guages while sombody else keeps it out of the ditches. The one that gets most attention is o2 sensor. "a society that will trade a little freedom for a little order deserves neither" Thomas Jefferson Clinton doesn't want anything Hitler didn't have. What do you get with Bob Dole, Bill Clinton, and Dolly Parton in the same room? Two boobs and a country singer! Harry Browne for president 96! Talltom ------------------------------ From: talltom Date: Sun, 22 Sep 1996 09:40:57 -0700 (PDT) Subject: Re: D disease Hey Rickydik - you out there? Drove the mbz around some tonight for the first time. Feels like this brain is programmed more toward stoichoimetric, ie big bog. Do the d-jetronic's have a eprom? Is it swapable? The original was a Bosch 0 280 002 013, and the one I replaced it with is a 0 280 002 005. Any ideas? Being as this rig is puny engined anyhow I kneed whatever it can do, and jacking fuel pressure will make a pig of it. "a society that will trade a little freedom for a little order deserves neither" Thomas Jefferson Clinton doesn't want anything Hitler didn't have. What do you get with Bob Dole, Bill Clinton, and Dolly Parton in the same room? Two boobs and a country singer! Harry Browne for president 96! Talltom ------------------------------ From: dzorde@xxx.au Date: Mon, 23 Sep 96 08:22:08 Subject: Re[2]: wasted-heat And who said blind people couldn't drive cars ? All we have to do is blind everyone else and we are equal. This little number with the 1040W is very close in colour to a fluorescent green, really makes it stand out on the race track. The everyday road car, well it's limited to 600W lights and 600W stereo. Still very impressive on a dark road though. Dan dzorde@xxx.au ______________________________ Reply Separator _________________________________ Subject: Re: wasted-heat Author: diy_efi@xxx.edu at INTERNET Date: 9/20/96 9:31 PM tom cloud wrote: > > What I've observed for electrical power draws: > headlamps 50 watts ~ 4 A > exterior lamps 10-20 watts ~ 2 A > interior lamps 10 watts ~ 1 A > dash lamps 2 watts ~ 200 mA. > ignition coil 50 watts ~ 4 A (intermittent) > radio 2 - xx watts ~ .25 amps (no volume) > tape deck motor 2 watts ~ .2 A > starter 1800 - 3000 watts ~ 150 - 250 A > fuel pump 24 - 120 watts ~ 2 - 10 amps > blower motor ( dunno ) > computer ( dunno ) > > Tom the 140/100 headlamps draw a little more than 4 and there are 6 spots to lighten up the road about the audio sys I'm not sure . The amps are true only for the top load situation and this will be nice but I'm not sure it will ever reach this because the numbers on this new amp-speaker stuff are unbelieveably high. Dan wrote : > I'm running 90/130W (low/high beam) in my headlights, a set of 150W > sealed beam for high beam and a set of 150W spotties. Comes to 180W > at low beam (around town), switch on the high beam and you have 740W > (due to the purposely designed wiring the low beam stays on when the > high beam is switched on), then switch on the spotties (1040W) and > boy, you'll be able to spot a roo 20Km up the road before you hit it. > It does tend to flatten the battery over long periods though, the > alternator drops to about 9.6V @xxx. > this is the reason I changed alternator to a 105 Amps one nice to know that there are other blind boys are driving on the world my car is white by the way bye charley ------------------------------ From: "Woodd, Michael" Date: Mon, 23 Sep 1996 08:05:00 +1200 Subject: RE: Tom Cloud's self tuning EFI Idea Excuse me? Anyway, >I do see potential problems though. For starters, if the system had all the >sensors needed to determine the "state of ultimate tune", how long would it >take the cpu to find it?? People that dyno tune engines on a regular baises >(TODD) would have a very good idea of this. I don't, but I'll guess any way. >Let say 20 full throttle quater mile runs just to get maxium dead stop >acceleration. There are lots of things to change and adjust, right?. I've >done this manually in my early hotrod years. You could spend a whole weekend >adjusting and evaluating things. All a matter of software - the algorithm used. Actually I was thinking more of a circuit racing application, cos thats what I'm into, being as a car should be nothing more than a tool for the driver, right? ;-) And thats why I stressed the importance of having accurate measurements, cos if they aren't, then your "perfect" algorithm is going to do funny things, like take longer, or maybe even head in the wrong direction. I plan on starting by simply investigating relationships between one sensor and another reading, e.g. acceleration vs vertical g, to account for road bumps, difference tween linear g vs wheel derived acceleration should give us the gravity vector that tells us we're going up/down hill (I think, like I said, don't know the physics well yet). My end system will be a combination of these little black boxes, and for prototyping they may be just that. Mike Woodd (wooddm@xxx.nz) Come on, gimme just one drive, I've been on a track before without pranging it... ------------------------------ End of DIY_EFI Digest V1 #284 ***************************** 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".