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#1. Long term fuel trims - from kitwetzler@mindspring.com
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Date: Thu, 4 Apr 2002 15:29:40 -0500 From: "kitwetzler@mindspring.com" <kitwetzler@mindspring.com> Subject: Long term fuel trims I have a question. I've always assumed that the Siemens OBD-II ecu only adjusts fuel trims in closed loop operation. It first adjusts short term trims, and those get propogated to long term fuel trims. In open loop operation, (ie WOT) I understand that the ECU uses only the long term trims, but does not adjust them. Is this correct? With some testing, the Subaru WRX ECUs are showing adjustments to the long term trims in open loop operation! if the BMW does this, it's gonna make programming my UNICHIP replacement much harder. (no questions about this yet, please...) Thanks. -kit -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .
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#2. Buttonwillow attendees: brake rotor request - from KLchmn@aol.com
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Date: Thu, 04 Apr 2002 15:56:47 -0500 From: KLchmn@aol.com Subject: Buttonwillow attendees: brake rotor request If anyone going to the Buttonwillow event has some new or slightly used front rotors, I'd be interested in buying them (possibly) this weekend as spares for my race car. I thought I had a set but couldn't find them last night in the garage...<sigh> Please look for me at the track. I will have the red M3 #21, red Ford F-350 Crew Cab Dually Diesel truck and 26' enclosed trailer! Also, regarding services at the track, there is a Mazda race shop that has a dynojet at Buttonwillow, so I don't think a welder is out of the question! <g> Cheers, Kirk Lachman Sin City Chapter '95 M3 #21 I-stock
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#3. Control Arms - from Dorffer, Rich
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Date: Thu, 4 Apr 2002 16:03:13 -0500 From: "Dorffer, Rich" <RDORFFER@CleIndians.com> Subject: Control Arms Shane writes > > At Oktoberfest last year I was sitting at a table with some folks, one of > whom was Ben Thongsai (Sp?). Anyway, he was asking me about the M3 ('96) > and when I commented that I had over 20 schools (probably close to 80 track > days) on the car he seemed adamant that I should replace the control > arms/ball joints before they failed and I died in a fiery crash. Tim writes > > Shane, this is a well know topic with the E30 m3 owners. > If the car is tracked frequently. New Alum. control arms > shoudl be replaced every 3 years no matter what the > conditrion of the ball joint is. The E36 m3 at least in > 1995 uses the same control arm/ball joint/ and bushing > so this should also hold true for a TRACK CAR. BUT now > that your car don't see the track anymore (I won't say > what you were driving @ CMP). The old arm should be okay > for daily use. Now if you have a heavy right foot and > can't stand being beat by the riceboys, then I would > suggust you to have them replace. Its like the helmut > thing, how much do you want to spend for safety? $300 or > $1500. Maybe drive the L.R. more. Except for the fact that the E36 M3 uses steel control arms which are not as susceptible to the fatigue that is often mentioned with respect to the E30 M3 aluminum control arms. I doubt the E36 M3 arms need to be replaced until the ball joints need replaced. I am sure someone will jump in here and correct me if I am wrong ;-) Isn't Ben one of those E30 owners??? Maybe that is where the confusion rests. Tim is just so confused due to his complete stable of BMWs, mostly E30s ;-) Later, Rich
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#4. prospective owner - from Burgess, Kim L
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Date: Thu, 4 Apr 2002 13:17:00 -0800 From: "Burgess, Kim L" <kim.l.burgess@boeing.com> Subject: prospective owner "I tried to convince myself that I could live in a 2 door E36 M3" I donno - "In 1995 I couldn't even afford an E36M3/2, today I live in one" - has a nice ring to it! KLB
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#5. Re: [E36M3] Control Arms - from Jim Bassett
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Date: Thu, 04 Apr 2002 13:26:14 -0800 From: Jim Bassett <jimbassett@attbi.com> Subject: Re: [E36M3] Control Arms At 01:05 PM 4/4/02, Dorffer, Rich talked about: >Except for the fact that the E36 M3 uses steel control arms which are not >as susceptible to the fatigue that is often mentioned with respect to the >E30 M3 aluminum control arms. I doubt the E36 M3 arms need to be replaced >until the ball joints need replaced. I am sure someone will jump in here >and correct me if I am wrong ;-) Well, not really a correction, just some more info :-) There is a Club Racing Technical Bulletin regarding the E30 M3 control arms (http://www.bmwccaclubracing.com/2002%20Series/Bulletins/0297.htm) - it can't hurt to apply the same advice to an E36 race car I would suppose. I haven't checked the M3's control arms, but will soon (112K+ miles and easily 80 track days). The control arms on the race car were scheduled to be replaced (initial inspection showed a small amount of "up and down" play) soon, but were replaced sooner when the control arm bushings needed replacing NOW. My 2 cents, Jim Bassett 1998 M3/4 1993 325is #44 KP
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#6. A/C [Was: Rambling] - from Michael Stembera
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Date: Thu, 4 Apr 2002 15:29:19 -0600 From: "Michael Stembera" <m_stembera@yahoo.com> Subject: A/C [Was: Rambling] Speaking of A/C is there a way to switch the air to recycle while keeping the A/C off? It seems once the recycle switch is on the A/C switch is ignored, which (to me) seems really dumb on the part of the BMW engineers. How often do I follow a smelly car in the winter and want recycled air w/o A/C. Mike -------------------------------- >Date: Thu, 04 Apr 2002 14:21:15 -0500 >From: Mark Greene <gsa@arpinintl.com> >Subject: Rambling > >Mike Kanaly - >I agree, cupholders are lacking and I still think the A/C - blower is too weak. Great drive though, welcome. Mark Greene
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#7. RE: [E36M3] prospective owner - from Mount, Mike
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Date: Thu, 4 Apr 2002 13:35:16 -0800 From: "Mount, Mike" <JMMn@pge.com> Subject: RE: [E36M3] prospective owner Or as Donna said, "You can sleep in your car. You can't race your house!" "I tried to convince myself that I could live in a 2 door E36 M3" I donno - "In 1995 I couldn't even afford an E36M3/2, today I live in one" - has a nice ring to it! KLB Mike
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#8. Re: [E36M3] Long term fuel trims - from Matt Henson
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Date: Thu, 4 Apr 2002 13:41:40 -0800 (PST) From: Matt Henson <hensonator@yahoo.com> Subject: Re: [E36M3] Long term fuel trims There are a few possibilities that I would consider: 1) The ECU is adjusting the fuel to try to battle some detonation. I'd expect that it would use timing for this except that too much timing retard can cook your exhaust valves, expecially on a turbo car. 2) If it's adjusting the LTFT, how do you know it's really open loop? Is it running at stoich? Is it possible that these cars have a wide-band O2 sensor? If they have a UEGO or similar then they will almost always run in closed loop mode since the O2 can measure from 11:1 up to 16:1 or so. I've heard that the OBD-II M3's don't really go open loop as soon as you are WOT. They may need to have a certain airflow or RPM or something. I'm not sure if this really true but it could explain what the Scooby guys are seeing. As for your Unichip, I'd get an OBD-II scan tool and start getting a feel for when it goes open loop. You can't really adjust that threshold so if it's too high then the Unichip isn't going to do much for you. If it goes open loop as soon as you get WOT then there's a big range in which you can play. Good luck and let us know how it turns out! -Matt --- "kitwetzler@mindspring.com" > > > Is this correct? With some testing, the Subaru WRX > ECUs are showing adjustments to the long term trims > in open loop operation! if the BMW does this, it's > gonna make programming my UNICHIP replacement much > harder. (no questions about this yet, please...) > > Thanks. __________________________________________________ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/
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#9. Re: [E36M3] Rambling - from Chris Papademetrious
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Date: Thu, 04 Apr 2002 17:21:35 -0500 From: Chris Papademetrious <chrispitude@yahoo.com> Subject: Re: [E36M3] Rambling At 01:25 PM 4/4/2002 -0600, Mark Greene wrote: >I agree, cupholders are lacking and I still think the A/C - blower is >too weak. Great drive though, welcome. Mark Greene As far as the blower is concerned - on hot days, it sure does seem like the A/C has a problem keeping up with my black interior. However, specifically regarding the blower, you might find this interesting: http://www.unofficialbmw.com/e36/interior/e36_air_distribution_cam.html This revised part increases the airflow when the selector knob is *between* two of the labelled settings (for example, defroster and dash vent). My mechanic fit this revised part into my 95 M3, and it made a big difference! In the winter, one of the most common settings is to sent heat to the defroster and the dash vents - let me see where I'm driving, and warm me up in the process. I'd get a miserable trickle of air out of the dash with the stock part. With the revised part, both the defroster vents and the dash vents have good flow coming out of them. It may not make the A/C better, but it might help you send it to more places with more efficiency to keep you cool! - Chris
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#10. Re: Rambling - from HYPERM3@aol.com
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Date: Thu, 4 Apr 2002 17:32:33 EST From: HYPERM3@aol.com Subject: Re: Rambling Waaa Waaaa......You want cupholders, buy a dodge...You want A/C open your windows. Im sorry but those weren't the clinchers on why I bought an M. The stereo sucks too but the music the straight six makes..ohhh...but wait cupholder wanters don't care. Sorry, I just had to say what others might be thinking. Alex "HyperM3" Demsky 97 S/C M3