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12-21-2008, 10:32 PM | #89 | |
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12-22-2008, 02:26 AM | #90 | |
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BTW, why would you assume 12% driveline loss? Is that some magic number you use? Hope not. And hope you don't use the stated torque figure from the manufacturer either as they are never accurate. And ultimately, you don't choose gear ratios based on the affect in first gear under unrestrained maximum throttle. There is something called throttle control. And you can get wheel spin in any available final drive ratio, including the OEM ratio. You can also not get wheel spin if you exercise throttle control. Then again, who said anything about a launch from dead stopped? In any case, when I speak of "acceleration", I talk in terms of real world usage as in stabbing the throttle and feeling the result (generally speaking). There are no 1/4 mile measurements or 0-60 sprints in my driving world. Probably not yours either. But thanks for sharing. L
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'07 MV Agusta F4 1000 R 1+1, Corse Red/Silver, RG3 race pipes and factory race ECU Last edited by MVF4Rrider; 12-22-2008 at 02:43 AM.. |
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12-22-2008, 02:30 AM | #91 |
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Except it's all irrelevant. But I agree, hope it's put to bed as I certainly don't enjoy being attacked in such a cowardly manner (Hack and aerobod). Tis not the season for this kind of childish behavior.
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12-22-2008, 03:55 AM | #92 | |
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12-22-2008, 07:27 AM | #93 | |
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12-22-2008, 06:42 PM | #94 | |
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When you have more experience, you will find that the whole package (transmission ratios, rear end ratios, engine torque profile, etc) is important. Having the right gear ratio at the right time in real world situations for best acceleration doesn't always mean the lowest rear-end ratio if you have to make more gear changes during the acceleration. The 12% driveline loss figure is a reasonable estimate for BMW manual transmission cars, based on quoted power and torque values vs rear wheel measured values. BMW quoted torque values have also been shown in the past to fall in the range of -1% to +10% of nominal values. |
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12-22-2008, 07:00 PM | #95 |
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Again, I agree.
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12-22-2008, 11:35 PM | #96 |
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I think both of u guys have some impressive and important points but all said and done. Changing the final gear ratio along will still improve the performance greatly in gears that we will actully get to use everyday. Plz stop all the personal attacks
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12-23-2008, 02:42 AM | #97 | |
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Ultimately, the real world isn't a road corse. You can't set up your gearbox to deliver the perfect terminal speed per gear for every situation you encounter. Sure, a shorter final ratio will cause you to shift more often and you might run out of a gear at a less optimium point. Who cares? Deal with it. That's a trade off for the increased acceleration. But it doesn't change the fact that the car will accelerate quicker with shorter final drive gearing in the vast majority of situations. Put it this way. Two identical Z4Ms other than one has stock final drive and the other a shorter final drive. Which do you think would be quicker around Nurburgring, same driver? If you prefer to keep your stock gear ratios instead of having the increased acceleration benefit then by all means. Personally I'm keeping my stock ratios as I'm satisfied with the acceleration and don't want to reduce the fuel economy any more than it already is. But that doesn't mean I can't appreciate the difference shorter gearing makes. In fact, in my last 2 Ducatis I shortened the gearing by adding 2 teeth to the final drive sprocket and the difference in acceleration was amazing. No way would I do that to my MV Agusta as it's too quick as it is. My MV already hits 150 mph in the 1/4 mile. Anyway...feel free to attack me some more!
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12-23-2008, 08:25 AM | #98 |
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Yes it is, but only because of the way you're reacting to his posts.
He's not attacking you, he's pointing out what you're failing to consider, and all you've done is blow him off and freak out. Chill out man.
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12-23-2008, 10:47 AM | #99 | |
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Regardless, happy holidays and my apologies for anything considered rude on my behalf.
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12-23-2008, 11:51 AM | #100 | |
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And on that note cheers!
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12-23-2008, 06:38 PM | #101 | |
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Anyway, it is pointless for me to argue any more with you, I have my opinion, you have yours and as I prefer discussing and debating the points as opposed to arguing about them, I won't add any more to this particular post. In life there are very few binary outcomes, most things are positioned somewhere on an infinitely sliding scale from one extreme to the other, but rarely at the extremes. |
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12-30-2008, 04:54 PM | #102 | |
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http://www.bimmerfest.com/forums/sho...3&postcount=64 Or your claims that TORQUE is the only thing that matters to acceleration. http://forums.bimmerforums.com/forum...=908998&page=3 Or your bogus claims that 335i gearing is shorter than E46 M3? http://bmwcca.org/forum/showthread.php?t=1013&page=2 You have absolutely no understanding of how engine, gear, torque, and RPM works. Stop posting your BS on these boards unless you have actual REAL insight. |
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12-30-2008, 09:26 PM | #103 | |
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12-30-2008, 09:37 PM | #104 | |
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12-30-2008, 10:46 PM | #105 |
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easy fellas. get a brew and lets all relax a little. Happy holidays to all fellow Z enthusiasts.
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12-31-2008, 01:50 AM | #107 | |
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Not sure why you and O-Cha seem to disregard the normal forum etiquette that keeps everyone from doing nothing but what you both do, which is to take disagreement to the disparaging level. Quit being pathetic and giving life to this crap. You must really have masculinity issues. Probably the worst thing about car ownership these days is forums and the few idiots which allow their unhappy lives to spill over unto others. For the last time, there's no reason to make anything personal. Now go sign up for an anger management class. I really wish age was visible for all to see. It would explain a lot.
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01-05-2009, 04:33 PM | #108 |
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I'm with Hawk...this thread is entertaining but someone posted this in another thread at it applies here.
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