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BMW 3-Series 2005 and earlier

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Comments

  • uge123uge123 Member Posts: 100
    Having driven both (although the S4 was an auto), I'd say that you might have a bit of an advantage off the line but the S4 would quickly catch up and possibly pass you.

    However, if your 330i has the SP, I believe that you could outhandle it in the twisties as the Audi is a little softer and doesn't handle as confidently, forcing the driver to be a bit more tenuous.

    Race if you have the chance. I'd love to hear of the results!
  • brave1heartbrave1heart Member Posts: 2,698
    I am basing my comment on identical tires on the A4 Quattro's Owner's Manual, which I scanned back in February when we took delivery of the car. It clearly stated with a warning sign on the page that using different tires tread and/or size could result in damage to the AWD system. The Quattro and X systems are different, though - the Quattro sends power 50/50 F/R, as opposed to the X, which sends what - 2/3 R and 1/3 F? Besides, the Quattro transfers torque from side to side and from what I've read, the X does not. I should have qualified my statement to say that this was definitely true about the Quattro and that the X may be similar. At any rate, AWD's are designed for year-round performance and typically come with all-season tires suited for driving in any weather. The 205/50/17 that the U.S. X SP comes with is the most aggressive rubber that you can safely use in ANY conditions. Anything with aspect ratio of 45 and especially width of 245 cannot be considered an all-season tire, IMO.
  • mmcbride1mmcbride1 Member Posts: 861
    The manual (if I rememer correctly) only says that all four tires must be the same size. That's why you get a full-size spare with another matching rim in the A4 and not a space-saver. I believe you can switch tire size as long as you do it to all four tires at the same time.
  • brave1heartbrave1heart Member Posts: 2,698
    The S4 is the second-fastest sedan in the U.S. - I think it is behind by the M5 only. It is pretty heavy at 3,700 lbs and the 330 may gain a couple of feet right off the start but the S4 will be substantially quicker overall. C&D timed it at 5.4 sec 0-60 last year. I saw an S4 take off in ice and slush like a rocket in front of me last winter and I couldn't believe my eyes how FAST it was in those weather conditions. The 330 would probably gain a bit in the twisties, though. At any rate, I'd gladly race an S4 even with my 325. If anything, I'd like to know how much faster than me it would be.
  • brave1heartbrave1heart Member Posts: 2,698
  • kominskykominsky Member Posts: 850
    In response to post #5264... I haven't done either yet. I got my car in late Feb. and decided to keep my old car as a beater. The BWM pretty much sat in my garage until late March when the ugliness of winter had passed. I will be purchasing a winter tire/wheel package this fall unless the Altima's still kicking. I'll do the bi-annual change over myself.
  • langley2langley2 Member Posts: 24
    Now what can we expect ... about 5 days at the VPC ? I'm in NE Pennsylvania, so the trip from the VPC to the dealer should only take one day. Then, a couple of days to prep for delivery ? If I'm right, I should be able to take delivery on Friday, June 22nd, or Saturday, June 23rd.
  • brave1heartbrave1heart Member Posts: 2,698
    <<< until late March when the ugliness of winter had passed >>> I thought you lived in the Bay area ?!?
  • kominskykominsky Member Posts: 850
    nope. PA. Usually our winters end with one snowfall in the beginning of March, but this year we kept getting pitiful little accumulations through the whole month... just enough to have the roadcrews out there spreading cinders and salt.
  • brave1heartbrave1heart Member Posts: 2,698
    I rememeber those beautiful pictures from your backyard - I don't know why I kept thinking Bay Area.

    Hey, can I call you a komi?

    Where is everybody? Summer blues?
  • kominskykominsky Member Posts: 850
    call me anything you want... just don't offend the censors ;-)
  • mfeldmanmfeldman Member Posts: 140
    I thought about an s4. It is fast, but the suspension makes it a lot bumpier. I didn't like the interior -- too cluttered -- tho some love it. I also didn't love the exterior. Finally I thought bmw had higher quality and safety.

    BTW i spoke with the dealer and he will evaluate my steering. If it requires a fix, I may get an old rack. Keep you posted.
  • brave1heartbrave1heart Member Posts: 2,698
    There are no censors :o) here. I think you meant to say senses, right? As in "don't offend my senses".

    BTW, thanks for the F-1 BMW pictures that you sent me. It puts a smile on my face every time I look at my desktop's wallpaper.

    Just wondering if Stalin ever had a chance to drive a BMW and whether the world would have been a better place if he had. Thanks for the feedback, komi.
  • veekay1veekay1 Member Posts: 180
    it shouldnt take 5 days at the VPC!! only 1-2 days as per BMWNA....i am hoping this Fri/Sat for delivery.....did u ask ur dealer?
  • koaladudekoaladude Member Posts: 9
    Thanks for the clarification.

    Unlike the Audi Quattro system, the XI AWD sends power 38%-62% front-rear (this to preserve the RWD feeling according to the brochure:))

    Does this make it possible to equip AWD SP with perf tires and different wheels combos (in Canada)? I seriously hope that the BMW people know what they're doing -not only marketing (those are the ones deciding the option packaging, right?!) but also the engineers.

    Another question. A quick browse at Bridgestone for winter tires and I found Blizzak LM22 at 225/45-17 and even 245/40-17! Are we now saying that those are too big and unsafe? (they are the exact same sizes as the SP summer perf tires)
  • brave1heartbrave1heart Member Posts: 2,698
    I've never driven one but I'm surprised to hear that the suspension has a bumpier feel. I drove an A4 with the SP and I liked the ride a lot. I know that the suspension is softer - you need that for best handling in adverse weather conditions. I've also read about the vertical body movements, which most Audis tend to have. I sat in one at the dealership and I loved the interior - I thought the quality of materials and workmanship was superb in a typical Audi fashion. It also felt very sporty with the Nogaro Blue exterior (the smurf color that I love) and charcoal grey/alcantara blue two-tone seat trim. Very distinctive! I also like the exterior, although it may start looking dated after so many years in production, especially when the new styling comes out in the fall. However, I think that Audi should have done a lot more to differentiate the exterior from the plebeian A4. they look too much the same and anyone paying 40 large for a compact sedan would want more distinction. Audi has always been big on elegantly understating their cars; I like mine a little more aggressive looking. The other thing about the S4 is that for that kind of money, I'd want a real back seat sized for adults. Not to mention that I had decided not to exceed my budget of 35 grand for a new car. I drive 24K miles a year average and need something more reasonably priced.
  • burrsrburrsr Member Posts: 255
    Just got back from lunch/Dr. appt. One of the main northbound highways is CLOSED due to a semi full of coal and/or asphalt spilling all 20 tons of its cargo onto the highway. Thankfully, no one critically injured, but traffic was a NIGHTMARE. Nice to have Gretl to keep company...

    Brave -- this is just speculation on my part, but I highly doubt that there would be any adaptive logic involved in the throttle response. In a conventional set-up, this would not even be possible, since no electronics are typically involved. In a drive-by-wire system, however, it would be possible to have some logic involved, but I can't think of a reason why the engineers would choose this. It seems you would ALWAYS want maximum response, which means that the amount of gas/air induced into the engine would always be constantly (not variably) proportional to the pedal travel. I.e., 75% of pedal travel ALWAYS equals the same amount of gas/air fed into the engine, regardless of driver style or other conditions. Also, if you were to have some adaptive logic in the drivetrain (which includes the throttle, engine, and tranny), it would not make sense to have it in two places (e.g., throttle and Step). This simply makes it more complex than it needs to be: keep it in ONE place versus two (throttle + tranny) or three (throttle + tranny + interaction between the two). Remember: KISS. This is a particularly useful acronym in the controls arena.

    Again, this is merely my speculation on what makes sense. I could be wrong -- this is a highly technical question that hopefully someone else has further insights on (or better yet, FACTS)...
  • eugeug Member Posts: 46
    I can't wait!

    -eug
  • thedeepdarkbluthedeepdarkblu Member Posts: 106
    I checked w/ BMWNA, and my 325Ci is still sitting there (in Bremerhaven, I assume), waiting for transport. I thought it would be on the Jingu Maru today (along w/ yours), but no word. It should've gone by now, as it's nighttime in Germany. Do you have any new info?
  • langley2langley2 Member Posts: 24
    Haven't talked to my dealer for a couple of weeks now. Actually, I really have no idea how long the VPC stage should be, but I do remember recently reading a post on this board or bimmer.org in which the poster estimated 5 days at VPC.

    This Saturday will be 11 weeks since my original date of order. I guess I'm just getting used to waiting and expecting delays every step of the way.
  • brave1heartbrave1heart Member Posts: 2,698
    I place the highest degree of confidence in the Ultimate engineers and I am also convinced that BMW's marketing arm is doing a great job, especially for a German company, which historically tend to be big on engineering and bad on marketing and PR.

    Can you tell me again exactly where you found this info about 330xi SP with Canadian specs? Any Canadian web site that has that info?

    Yes, you can put in performance tires in AWD cars - a friend of mine who has an Audi 90 here in Boston spent the whole winter driving his Quattro with Dunlop SP8000's (very summery) and drove his car to Phily in a huge snow and ice storm 90 mph pretty much all the way. You'll be fine with performance tires but I would not put in different size tires and I still keep thinking that this is some sort of a mistake, esp. considering that it is not offered on the 330xi in the U.S.

    Yes, I'm sure that 245/40/17 and even wider winter tires exist. You can also find 345/30/17 summer tires but that doesn't mean they improve the handling of your 3-series. I think a width of 245 will be OK but not nearly as good for snow driving as a width of 205. It's common sense - the wider the tire, the less it can dig into the snow. Kind of funny talking about all this in the middle of summer. It has a chilling effect on me just thinking about it :o)
  • brave1heartbrave1heart Member Posts: 2,698
    ... in the manual and on the driver's side door are for cold tires. Direct sunlight may increase the tire pressure marginally but not nearly as much as driving.
    I strongly disagree with using higher tire pressure than recommended for EVERYDAY driving. The higher the tire pressure, the bouncier the car is in turns. Tires with lower tire pressure are stickier when cornering because they have the ability to adjust the sidewalls better. Bouncier tires get you better mileage and slightly better acceleration. I tried different tire pressure for my 325i and found 31/34 F/R to be optimal for everyday spirited driving. On the track, I might bump both up by 5 psi but even then it's a tradeoff between acceleration and handling. Oh, a minor detail: tires wear out faster with less air pressure. Fine with me.
  • shiposhipo Member Posts: 9,148
    Dl7265,

    Brave1heart is correct, I do not have the SP on my car, NYC metro streets are so bad that I wanted to minimize my chances of bending another rim (I bent 5 on my last car).

    Koaladude,

    I spent some time on the BMW Canada web site and I can find no reference at all that ANY 330 (i or xi) that has anything other than 205/50 R17 rubber. The 330xi SP does however have different wheels (type 68m) from the standard 330xi. What did I miss?

    Best Regards,
    Shipo
  • add123add123 Member Posts: 28
    jpcbearden,

    I believe your sales person is not being honest with you. I ordered my 330i in April. I sat there and watched him place the order. He then gave me a copy of the order. The production number was on top. The following day I was able to track its progress.

    add123
  • denrightdenright Member Posts: 285
    I have to be honest, I never gave the S4 much thought. I went so far as considering the A4 2.8 vs. the 325xi. Once I went past the 325xi and started to seriously consider the 330xi, I never really went back to thinking about an Audi. I probably should have, but I still would have ended up with the Bimmer.

    The S4 is probably slightly faster than the 330, with 250 peak HP compared to the 330's 225, and I believe it is a few hundred pounds lighter. I understand that the 330s torque band is significantly wider, however.

    MotorWeek timed the S4 at 5.9 seconds in the 0-60, while it timed the 330xi at 6.2. So the S4 is ever so slightly faster than the 330xi in the 0-60.

    In MotorWeek's quarter mile test, the results are even closer, with the 330xi turning in a time of 14.7 seconds, finishing at 96 MPH. In turn, the S4 turned in a 14.5 second time, crossing the line at 97 MPH.

    So it strikes me that these two cars are almost a deadheat in terms of acceleration, with a slight edge going to the S4. I think the edge in handling, looks and interior appointments probably go to the 330xi. Finally, comparably equipped, the S4 is slightly more expensive than the 330xi.

    As a side note, many have noted in the past that MotorWeek timed the 330i at 6.8 seconds in the 0-60. I just read their review of the 330i vs. other sport sedans, and it turns out their 330i tester was equiped with a STEPTRONIC!! This explains the relatively slow time. In fact, I suspect the manual would test out a full second faster.
  • brave1heartbrave1heart Member Posts: 2,698
    burrsr - everything you say makes a lot of sense as far as engineering. As far as driver needs, I'm thinking if the step can adapt to reach higher RPM's based on driver style, why wouldn't it make sense for the throttle response to do the same? I see what you mean about linear response. But what I'm talking about is this: let's say you are at 25% and floor it. The question is how FAST do you get from 25% to 100%? I'm guessing that at 75% you'd still be using a constant but what if you could go from 25% to 100% directly? That could be a half-second difference on optimized throttles. I can also see why some drivers would smoother acceleration while other drivers would want to go directly from 25% to 100% even if that means that car jerks in the process.

    BTW, KISS is Keep It Simple, Stupid - correct? Wasn't sure about the second 'S'
  • genie1genie1 Member Posts: 398
    What part of Canada are you in? If in Ontario, do you have a dealer/rep you could recommend? I will be looking for my car soon (over the next couple of months) and referrals are always appreciated.
  • denrightdenright Member Posts: 285
    One last note... the S4/A4 line of Audis is about to be redesigned for the 2002 model year. Any 2001 I might have bought would have been out of date within a few months. Contrast this with the E46, which is not due for a redesign until 2005.

    Finally, I have to quote my friend Conor. He has reasserted, time and again, the following: "An Audi is a glorified Volkswagen. A BMW is a BMW."
  • burrsrburrsr Member Posts: 255
    Brave-

    This starts to get really technical when you think about some more. I understand your point about the rate of change in throttle input. I would guess (again, a guess) that the speed with which the engine responds to the throttle inputs is dependent on a NUMBER of factors, such as: current RPM, O2 density of the air, weight of reciprocating parts (pistons), weight of revolving parts (flywheel, crankshaft), quality of gasoline, etc., etc., etc. These would be the PHYSICAL limiters of how well the engine responds to throttle inputs. I'm sure there are controls to ensure that timing and other controllable characteristics are ALWAYS optimized according to the current parameters. By that logic, introducing any further controls to adjust for driver tendencies would, by definition, be less than or equal to optimal. Still doesn't make sense to introduce any driver/throttle logic if the above assumptions are correct.

    It does make sense, however, that as the engine breaks in, response may improve, as parts wear together, improve seals and tolerances, etc. This may be a likelier explanation.

    Again, I welcome any other input from others who have more expertise in engine controls (I have absolutely none, just applying general engineering principles). It's interesting stuff...

    Oh yeah...KISS is officially "Keep It Simple, Stupid," although the last "S" is discretional -- substitute your own "S" as desired. :)
  • brave1heartbrave1heart Member Posts: 2,698
    Thanks for clarifying the MotorWeek numbers - this is finally making a lot sense. I can believe 330i at 5.9, 330xi 6.2, 330ia 6.8, 325i 6.7.

    It's funny - if I were going to buy an AWD 3 months ago, I would've probably bought the S4 w/o test-driving any other car. There's something about 250 HP and 6-spd manual and grip in any condition that sounds irresistible. Knowing what I know now, I'd probably go for the 330xi because the 3-series in ANY platform is a car that INSPIRES more (road feel, sound, communicative chassis).

    I think the 5.9 sec number you quoted was for the S4 Avant. Audi's official number for the S4 sedan were 5.4 I think - at any rate, definitely a little faster than the E36 M3 at 5.6 sec. The S4 is still almost 200 lbs heavier than the 330xi but it would be substantially faster with its massive 258 lbs torque aided by the twin turbos. That engine has an even wider torque band than the 330.

    When all is said and done, the are both great cars. I'd have to disagree with your friend on his statement about the Audi being a glorified VW. I had a Jetta for many years and every time I compared the Jetta to its same model year Audi counterpart, the Audi was just a much better-built car. We looked at the Passat and the Audi when we were shopping for my wife's car and the difference in build quality and details was astounding in favor of the Audi. Even the '00 Passat looked like an economy car compared to the A4. Having said all that, yes, I do like the fact that there are no cheap BMW's out there and a BMW is a BMW. Even an X type Jag looks too much like a Contour - you never get that with a BMW. It looks like a BMW and only BMW.
  • tchootchoo Member Posts: 93
    Yup, the car is still at the port, its been there since 6/8. Guess these German ports aren't terribly efficient. I used to work in a company providing container scheduling software for the port of Singapore. Most turnaround times were in hours, not days! Maybe they use a person tracking everything on a blackboard! Anyway the next ship arrives on 7/3. So I'd expect to see it on 7/10 which is unfortunate cos my 5.99% rate is only valid till 7/7. Oh well. I'm going for the Mercedes PowerTrip saturday after next. Should be fun, I want to try the new C320 and the Lexus IS300. Maybe it'll change my mind? NOT!
  • gurumikegurumike Member Posts: 442
    Okay, I have to admit, I've been waiting for an opputunity like this !!

    Audi S4 second fastest !!! Well, it's not that far behind...

    Sticking to strictly 4 door and using manufacturer claims (because they're all done in the same controlled fashion and therefore permit an apples for apples comparo), I'd say it goes like this:

    1. BMW M5
    2. Jaguar XJR
    3. BMW 540i (6 speed man)
    4. Mercedes Benz E55
    5. Subaru Impreza WRX
    6. Mercedes Benz S55
    7. (uuggghhh) Lexus GS430 (watch the rear end in high speed turns, it's a snapper)
    =8 Audi S4 (6 speed)
    =8 BMW 330i (5 speed)
    =8 Audi S8
    =8 Audi A6 2.7T (6 speed) (yes, the same as S4)
    =8 BMW 740i Sport Pkg (SWB only)
    =8 Lexus LS430
    there are more

    Other comments.

    denrights friend connor "glorified VW" is more than a little unfair. There're really quite different cars (despite recent models platform/engine/suspension sharing). An Audi is a far higher quality finish and it's the Audi engineers who come up with things like multi-link front suspension and 5 valve cylinder heads (may-be we don't really need them but BMW can't make that claim). The Audi's engineering is every bit upto BMW and Mercedes Benz.

    Having said that, I will share something I've been holding back on with regard to the ongoing S4 vs 330i debate. (God I hope my Audi customers aren't watching!) See, I sell Audi and BMW (we also have MBZ, Jag & Porsche) and I've had plenty of chances to drive all versions of both cars, frequently and in different conditions (including off public highway in simulated emergency situations)and I can tell you one thing...
    There really is, quite simpley, no comparison between the two cars. Sure the S4 is quick, but I find it sorely dissapointing next to, say, the old E36 M3. A 330i is just as quick as the S4 but the BMW has a feel that puts it in a different league than anything this side of a 360 Modena. Seriously. I'm hoping that with the new A4, Audi will have a better feeling car but I really don't think they will. The BMW is unique. Even the Porsches, great as they are, don't have that all-round sense of solidity and feeling of total understanding of what the car's doing. You all just don't know how lucky you are. They really are that good and comparison to ANY other car is in many respects pointless. Especially to Swedish cars!

    One last thing. Give up on the go sixers nonsense. You'll all feel that much worse after Big Shaq and Uncle Kobe bust out the brooms.
    Let's go Lakers, let's go....
  • brave1heartbrave1heart Member Posts: 2,698
    Interesting... I'm taking back my words about the S4 being second. Can you put the manufacturers' times next to the cars, please? Somehow I thought the S4 was definitely faster than the 540i 6-spd and Scoobie Doo...
  • gurumikegurumike Member Posts: 442
    1. 4.8
    2. 5.2
    3. 5.6
    4. 5.6 (and a half?)
    5. 5.7
    6. 5.8
    7. 5.9
    8. all 6.1 (no 4 doors at 6.0 interestingly)
  • gurumikegurumike Member Posts: 442
    Remembering that gearing is paramount to quick off-the-line acceleration (think of domestic SUVs. Also that's how Toyota get's such quick times from it's Lexus cars) consider this:

    Audi S4 approx 3650lbs (DAMN !!) in stick shift form and 250 hp. 3650/250=14.6 lbs/hp
    Subaru WRX approx 3050lbs stick and 227hp.
    3050/227h=13.4 lbs/hp.
    That's nearly a 10% better power to weigh ratio. I wonder how that works out for our 330i ???
  • denrightdenright Member Posts: 285
    As far as the Lakers and brooms go, it would be rather hard for them to "sweep" when they've ALREADY LOST A GAME. =)
  • dantlodantlo Member Posts: 106
    Try Century West BMW in Universal City. I got a great deal from them on my 2001 325i, because this is my 3rd bimmer from this dealer. Ask for Drew Sebring.
  • brave1heartbrave1heart Member Posts: 2,698
    Official S4 time is 5.9 as quoted on audiusa.com's web site. Not sure where you got 6.1. C&D tested it at 5.4 last year and I think that's totally doable with the 2.7T engine. I agree with you that it would be easiest to use manufacturer's data for an apples-to-apples comparison. Good point about the Jag XJR - I always keep forgetting about that one, maybe because they are so rare.
  • gurumikegurumike Member Posts: 442
  • gurumikegurumike Member Posts: 442
    Yup, that sounds like Audi to me!!
  • bmwagonmasterbmwagonmaster Member Posts: 150
    1.When the console mounted lock switch broke, the key controls still worked, and the inside door handle "double-pull" to unlock still worked. That's been my only problem to date.
    2.I was also curious about the Regensburg build for all the 3-wagons. I checked with BMWUSA who said yes.
    3.I checked out the glove box CD-changer but the install instructions required removing radio to run cable and I didn't feel comfortable with that. The rear install is "plug-and-play" easy.
    4. Sorry, but I don't ever get snow. Lots of rain, though, and the AST/DSC are very comforting.
    While most of you are looking for the right snow tire, I'm going to be looking for a better rain tire than the Michelins!
  • brave1heartbrave1heart Member Posts: 2,698
    Not bad for a Lakers fan. I'll settle for a 20-point Sixers win tonight instead of the 1-point win that I was hoping for. You'd suffer less with a 20-point win. See, 1-point win is too painful because you keep your hopes high till the very end. What time is the game anyhow?
  • brave1heartbrave1heart Member Posts: 2,698
    My Contis have been truly incredible in rain.
  • brave1heartbrave1heart Member Posts: 2,698
    > Mrs. Davidson's dishwasher quit working, so she called a repairman.
    > He couldn't accommodate her with an evening appointment. Since she had
    > to go to work the next day, she told him: "I'll leave the key under the
    > mat. "Fix the dishwasher, leave the bill on the counter, and I'll mail
    > you the check. By the way, don't worry about my Doberman. He won't bother
    > you. But, whatever you do, ...do NOT under any circumstances talk to my
    > parrot!"
    >
    > When the repairman arrived at Mrs.Davidson's apartment the next day, he
    > discovered the biggest and meanest looking doberman he had ever seen.
    > But, just as she had said, the dog just lay there on the carpet, watching
    > the
    > repairman go about his business. However, the whole time he was there,
    > the parrot drove him nuts with his incessant yelling, cursing, and
    > name-calling.
    >
    > Finally the repairman couldn't contain himself any longer and yelled:
    > "Shut up, you stupid ugly bird!"
    >
    > To which the parrot replied: "Get him, Spike!"
    >
  • bmwagonmasterbmwagonmaster Member Posts: 150
    Thanks! I know you posted the Conti model before but would you mind telling me again?
  • brave1heartbrave1heart Member Posts: 2,698
    <<< I'm sure there are controls to ensure that timing and other controllable characteristics are ALWAYS optimized according to the current parameters.>>> I'm wondering what Dinan does to improve throttle response as they claim they do with the Stage 1 software download.

    <<< It does make sense, however, that as the engine breaks in, response may improve, as parts wear together, improve seals and tolerances, etc. This may be a likelier explanation.>>> Sums it all up but still wondering about your first statement above.
  • brave1heartbrave1heart Member Posts: 2,698
    I had recommended the Dunlop SP8080 (same as the SP8000 but '8080' signifies different size) for a great performance tire and a perfect blend between performance and low road noise. I think you seemed to place a lot of emphasis on low road noise when I posted that recommendation. The Contis in my 325i SP are 225/W45/17 ContiSport Contacts.
  • chaosteochaosteo Member Posts: 3
    I test drove a 330xi in Vancouver yesterday. It is nimble and fast, but I don't like it too much since its steering wheel has too much power added and is really small( compared to my 528i) and the body is not so stable at high speed.
  • burrsrburrsr Member Posts: 255
    Dinan probably alters some of the logic in the engine's timing -- perhaps more aggressively, and perhaps at the expense of fuel consumption. Again just a guess. Don't they offer engine management software mods for non-drive-by-wire throttle linkages, too? If so, I would wager that the two systems are similar and are independent of how the accelerator pedal inputs/relates to the engine.

    Apparently there are no experts out there, unless Mr. Dinan himself is monitoring...this one may go down as an Unsolved Mystery.
  • ajvdhajvdh Member Posts: 223
    Burrsr's pretty close. Aftermarket software dinks with ignition timing, air/fuel maps and Vanos (variable valve timing) maps.

    Most of the differences with the stock program are in the "open loop mode" area, which you're only in when you're heavy on the throttle. On the street, you're usually in closed loop mode, meaning the ECU is "tuning" the engine in response to what the O2 sensor in the exhaust pipe is saying. There is some tuning done in this area, but not as much.

    I don't know as much about Dinan, but I know for the Jim Conforti software the big compromise you make is you can't run anything other than premium, unless of course you like the sound of pre-ignition.
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