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#1. Euro HFM and Injectors - from Paul Elliott
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Date: Wed, 28 Aug 2002 23:34:29 -0400 From: "Paul Elliott" <elliott.paul@worldnet.att.net> Subject: Euro HFM and Injectors Hi Matt, >>At the Torque peak the injector on time per spray is at the maximum, but there is a lot of time for that spray (since the RPMs are lower) so the duty cycle is still less than at the HP peak....The operating point where maximum duty cycle is achieved is near the power peak (exactly at the power peak if the AFR is constant). << So, in the final analysis, where are you most likely to find that an overused injector is at its 100% duty cycle: at Torque peak, or at HP peak? Here's another, somewhat related question..In a Supercharged engine, detonation is one of the key things to look out for...Ive read that detonation is most likely to occur at the engines' Torque peak. If thats true, then why in a Centrifugally supercharged engine, is it so crucial to watch for the proper AFR at Max HP, which just happens to be at the max RPM level? Since a lean engine leads to detonation, this implies that in this case, its the HP peak which is most closely tied to detonation rather than the torque peak, since max hp is made at max rpms? Possible answer: The reason we look at the high rpm levels for a good rich AFR and search here for detonation is because this is where the EGTs are likely to be highest, and high EGTs are usually a sign of a lean engine, and high EGTs can lead to detonation? So, perhaps in a centrifugally supercharged engine, its most important that the upper rpms levels are accompanied by a rich enough mixture, whereas in a turbocharged engine, we look at the Torque peak with the same kind of scrutiny for good rich AFRs? Paul Elliott --------------------------------------------------------- '99 White M3; < 45K miles; Dinan stage II SC kit with 6" RMS crank pulley: 11 psi; AA Water/Methanol Injection; Fikse FM-10s; X-Brace; Dinan Koni Suspension; Stygar SS and Clutch Stop; Sound by Polk, Excelon, JLAudio
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#2. RE: Questions about brakes - from Paci, Noah
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Date: Thu, 29 Aug 2002 08:23:49 -0400 From: "Paci, Noah" <npaci@rr.com> Subject: RE: Questions about brakes Yeah, I don't think brembo makes rear rotors for our cars, I don't remember the brand, but no it is not brembo, but just get OEM rotors and you will be fine. Cheers, Noah. >Thanks a lot, Rich and all the listers that have offered me help! I've >already looked up all the parts I need via Zygmunt, so I might not need the >part numbers. I, however, am a little concerned that the front rotors are >Brembo whereas the rear ones don't have any brand name listed there. Should >I go ahead and order them anyway? Do they match?
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#3. 97 M3/4- what to look for when buying - from Paul Smith
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Date: Thu, 29 Aug 2002 08:11:22 -0500 From: Paul Smith <pauls@ontario.com> Subject: 97 M3/4- what to look for when buying I have an opportunity to buy a 97 M3 sedan with 5 speed. What should I be looking for as I look at this BMW? Is 22,500 a very good price for 55,000 miles? Paul Smith In past, 95M3 - and many other regular BMWs
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#4. E36M3 17 x 8.5 38 ET wheels fit other cars - from Msebmwman@aol.com
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Date: Thu, 29 Aug 2002 01:30:51 EDT From: Msebmwman@aol.com Subject: E36M3 17 x 8.5 38 ET wheels fit other cars Perhaps someone here knows the answer to this. What other cars besides BMWs do 17 x 8.5 inch wheels with 38 mm offset that come from an E36M3 fit? Perhaps I'm trying to match a car to some spare wheels? Where else might I find this information (is this a question that tirerack could answer?). Thanks, Marc 95 M3 CSL 95 M3 regular
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#5. Re: [E36M3] Euro HFM and Injectors - from Matt Henson
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Date: Thu, 29 Aug 2002 07:37:26 -0700 (PDT) From: Matt Henson <hensonator@yahoo.com> Subject: Re: [E36M3] Euro HFM and Injectors Paul, Comments inline, below. -Matt --- Paul Elliott <elliott.paul@worldnet.att.net> wrote: > > Hi Matt, > > >>At the Torque peak the injector on time per spray > is at the maximum, but > there is a lot of time for that spray (since the > RPMs > are lower) so the duty cycle is still less than at > the > HP peak....The operating point where maximum duty > cycle is achieved > is near the power peak (exactly at the power peak if > the AFR is constant). << > > So, in the final analysis, where are you most likely > to find that an > overused injector is at its 100% duty cycle: at > Torque peak, or at HP peak? At the HP peak. At the torque peak, the pulse width may be higher but the actual duty cycle will be lower since there's more time per cycle. > > Here's another, somewhat related question..In a > Supercharged engine, > detonation is one of the key things to look out > for...Ive read that > detonation is most likely to occur at the engines' > Torque peak. If thats > true, then why in a Centrifugally supercharged > engine, is it so crucial to > watch for the proper AFR at Max HP, which just > happens to be at the max RPM > level? Since a lean engine leads to detonation, > this implies that in this > case, its the HP peak which is most closely tied to > detonation rather than > the torque peak, since max hp is made at max rpms? I think that if you look at the torque curve of a centrifugal blown engine, the torque curve is actually pretty flat. The torque peak is no longer a single point at 4500RPM, but more of a straight line all the way up. So, the point of greatest detonation still occcurs near the torque peak. It makes sense that it would happen at a higher RPM point since the intake charge gets hotter. > > Possible answer: The reason we look at the high rpm > levels for a good rich > AFR and search here for detonation is because this > is where the EGTs are > likely to be highest, and high EGTs are usually a > sign of a lean engine, and > high EGTs can lead to detonation? So, perhaps in a > centrifugally > supercharged engine, its most important that the > upper rpms levels are > accompanied by a rich enough mixture, whereas in a > turbocharged engine, we > look at the Torque peak with the same kind of > scrutiny for good rich AFRs? In all cases you want to have the maximum AFR to ensure that you don't get detonation in all operating conditions. EGTs have more to do with ignition and valve timing than AFR. If the engine starts to detonate then it will retard timing, which will increase the EGT. This may stop the detonation, but you as a user might think that it's getting worse. I suppose that if you had more fuel in the first place then perhaps it wouldn't knock and the timing wouldn't get retarded. There are a lot of variables involved in these things. Richer and more advanced aren't always better. > > Paul Elliott > > > > __________________________________________________ Do You Yahoo!? Yahoo! Finance - Get real-time stock quotes http://finance.yahoo.com
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#6. Re: [E36M3] E36M3 17 x 8.5 38 ET wheels fit other cars - from LoweSeaton@aol.com
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Date: Thu, 29 Aug 2002 10:58:55 -0400 From: LoweSeaton@aol.com Subject: Re: [E36M3] E36M3 17 x 8.5 38 ET wheels fit other cars Marc, All E36 M3 wheels whether 7.5" or 8.5" are 41 mm offset. It is a rather unique offset. Probably only BMW has that exact offset. 38 mm offset is a fairly common aftermarket size and usually works on our M3's. Tirerack might be a good place to start. Good luck, Lowell Seaton '95 M3 BMW CCA #131505
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#7. Re: [E36M3] 97 M3/4- what to look for when buying - from Dave Kelley
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Date: Thu, 29 Aug 2002 11:37:49 -0400 From: "Dave Kelley" <d.kelley@usa.net> Subject: Re: [E36M3] 97 M3/4- what to look for when buying Without knowing anything else about the car, $22.5 sounds fair. As for what to look for? You know the drill. Have it checked by a competent mechanic! There are no real "problems" with 96+ M3's. Dave Date sent: Thu, 29 Aug 2002 08:33:48 -0500 From: Paul Smith <pauls@ontario.com> To: E36M3 <e36m3@bmw-m.net> Send reply to: Paul Smith <pauls@ontario.com> Subject: [E36M3] 97 M3/4- what to look for when buying > Date: Thu, 29 Aug 2002 08:11:22 -0500 > From: Paul Smith <pauls@ontario.com> > Subject: 97 M3/4- what to look for when buying > > I have an opportunity to buy a 97 M3 sedan with 5 speed. > What should I be looking for as I look at this BMW? Is > 22,500 a very good price for 55,000 miles? Paul Smith In > past, 95M3 - and many other regular BMWs
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#8. Re: Questions about brakes - from Carl Stern
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Date: Thu, 29 Aug 2002 09:47:30 -0600 From: Carl Stern <carl.stern@xilinx.com> Subject: Re: Questions about brakes > But, dont forget that German pads are mandated to contain Graphite We're sure this is a fact? Why? Is this instead of something else, or is Germany a graphite producer? By the time my wheels look bad the whole car needs a wash anyway. I think the stock Jurids work great, I'll keep them for the street. PF 97s for the track though. Carl Stern
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#9. RE: [E36M3] 97 M3/4- what to look for when buying - from Dames, Mark
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Date: Thu, 29 Aug 2002 10:19:58 -0700 From: "Dames, Mark" <Mark.Dames@PDO.Co.Santa-Clara.CA.US> Subject: RE: [E36M3] 97 M3/4- what to look for when buying Paul, I'd look for worn: rear trailing arm bushings rear shock mounts shocks front control arm bushings stiff/cracking radiator hoses a/c & serpentine belt bent front or rear control arms /alignment problems Cracked fog lamps. Damaged front air dam. Missing damaged lower splash panels (plastic shields under the radiator/front of the engine) accident damage/repairs--readily apparent from looking at engine compartment for front end damage--you'll see new fenders, radiator support, etc, apparent in rear if you take out the truck lining and see welded/repaired quarter panels. Does the under side of the car have any dents indicating the car ran over something big at speed? Does the car have the right tires 225x45x17 fronts and 245x40x17's rear? Are they something good (Michelin Pilot Sports) or are they junk? What's left on them? Any bad camber wear? Has the radiator or water pump ever been replaced? Does the car have the stock suspension? If not, are the mods something that works well/you want. Does it have the HK Harmon Kardon/Alpine (top) stereo option? Does it have a CD changer (mounted in trunk)? Does it have the fold down rear sear? Do all the power windows, locks, seats, sunroof work? Do you want a sunroof? (more headroom without it if you're tall and wearing a helmet) Non-sunroof sedans are rare but they do exist if you need it. Note: a sedan is a taller roof line than a coupe so you start off with more head room.) Good luck. mark. -----Original Message----- From: Paul Smith [mailto:pauls@ontario.com] Sent: Thursday, August 29, 2002 6:34 AM To: E36M3 Subject: [E36M3] 97 M3/4- what to look for when buying Date: Thu, 29 Aug 2002 08:11:22 -0500 From: Paul Smith <pauls@ontario.com> Subject: 97 M3/4- what to look for when buying I have an opportunity to buy a 97 M3 sedan with 5 speed. What should I be looking for as I look at this BMW? Is 22,500 a very good price for 55,000 miles? Paul Smith In past, 95M3 - and many other regular BMWs ************************************************************* List Commands UNSUBSCRIBE - (in subject line) unsubscribes you from the mailing list. DIR - sends a listing of files available in the list's GET directory. GET filename1.ext,filename2.ext - sends the requested file(s). To issue a command/request to the server: Send a message with the command you wish executed as the subject of the message to the email address e36m3@bmw-m.net. *************************************************************
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#10. 96+ Spark Plugs - from Rex Tener
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Date: Thu, 29 Aug 2002 11:21:45 -0700 From: Rex Tener <rex_tener@yahoo.com> Subject: 96+ Spark Plugs The plug BMW has listed for the '96+ M3's is the Bosch FGR 8 KQC. On Bosch's web site, they list the 4303 (Plat +2) and the 4417 (Plat +4). Are these all equivalent and I can use any of them, or should I go track down the FGR 8 KQC plug? Thanks, -- Rex Tener rex_tener@yahoo.com