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General BMW Model Discussion
All non E46 BMW model questions in here. Look below for E36, E90 and F30 specific forum. For additional model specific forums check out bimmerfest.com!

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Old 10-03-2006, 09:37 PM   #21
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thats pretty sick!
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Old 10-03-2006, 10:26 PM   #22
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where is bella motorsports in west palm?
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Old 10-03-2006, 10:49 PM   #23
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Ernie Bello....hes in west palm yeah
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Old 10-03-2006, 10:50 PM   #24
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Old Oakachobee and Austrailian Ave.
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Old 10-03-2006, 10:52 PM   #25
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i think the rims where 17's
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Old 10-03-2006, 10:54 PM   #26
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hmmm mayb they were 18's i forget
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Old 10-03-2006, 11:02 PM   #27
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The 335's are really nice. It's one of the cars I'm considering for my daily driver.
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Old 10-04-2006, 06:46 AM   #28
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That thing needs a more aggressive diff like a hole in the head. It just needs an LSD!
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Old 10-04-2006, 09:28 AM   #29
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The stock rims flowed better. The BBS looks too small and narrow. E92 needs a fat 5spoke wheel.
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Old 10-04-2006, 09:51 AM   #30
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sweet, ill have to stop by...maybe they'd be good with installing headers and cams... btw 335i is sooo damn hot.
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Old 10-04-2006, 10:54 AM   #31
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hmmm mayb they were 18's i forget
Those are 19!!! and they still look small. a 3.46 woo guess it must be new parts too $$$$ as it'll be too early to find used parts on e92.
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Old 10-08-2006, 10:38 PM   #32
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sweet
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Old 10-09-2006, 03:20 PM   #33
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Very impressive.
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Old 10-09-2006, 03:35 PM   #34
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That thing needs a more aggressive diff like a hole in the head. It just needs an LSD!
exactly. Turbo'd cars benefit from higher ratio diff, right? No reason to switch to a lower gearing, except if you want to lose boost pressure
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Old 10-09-2006, 08:29 PM   #35
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exactly. Turbo'd cars benefit from higher ratio diff, right? No reason to switch to a lower gearing, except if you want to lose boost pressure


Boost pressure is built in exhaust gases and engine load. Has NOTHING to do with final drive. If anything would be from lower final drive to get more load.

But Boosted car can benefit from a longer first gear to take advantage of the turbo quick spool up and not waste it on tire spin and rev limiter coming so fast.
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Old 01-03-2007, 05:25 AM   #36
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Boost pressure is built in exhaust gases and engine load. Has NOTHING to do with final drive. If anything would be from lower final drive to get more load.

But Boosted car can benefit from a longer first gear to take advantage of the turbo quick spool up and not waste it on tire spin and rev limiter coming so fast.
however, you have to take into consideration this is not a traditional turbo setup. there's a small turbo that spools up boost quickly while another larger turbo kicks in at the higher end. a lot of the know-how with traditional turbo setups don't apply in a straight forward way here...
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Old 01-03-2007, 07:46 AM   #37
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Thats not how this turbo system works. Its not a sequential set up. Equal sized turbos are attached to 3 cylinders each and provide their own boost to each side. BMW preferred to use smaller turbos with quicker spool on each "bank" to ensure low end torque. Regardless of how the turbos are set up final drive still means nothing in the power category.
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Old 01-03-2007, 08:07 AM   #38
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Thats not how this turbo system works. Its not a sequential set up. Equal sized turbos are attached to 3 cylinders each and provide their own boost to each side. BMW preferred to use smaller turbos with quicker spool on each "bank" to ensure low end torque. Regardless of how the turbos are set up final drive still means nothing in the power category.
You're right about the twin turbo setup. I was thinking of BMW's twin turbo diesel engine that has a sequencial turbo setup.

However, gearing does influence the drivability of a turbo engine car. Just as an example, off line in 1st gear, the car with the higher multiplying gear ratio is going to reach a lower RPM than the same car with a lower multiplying gear ratio at the same speed. Hence, as an example, at say 40mph, one car will be at 3000 RPM vs the other car will be at 4500 RPM. If your boost doesn't kick in until 4000RPM, then having the gear ratio that gets you in that RPM range quicker will make getting into the "boosted zone" easier. Typically, the car that gets into the boost zone quicker will be faster. At higher speeds, this becomes less significant as you can choose to use a lower gear to keep your revs up, and hence in boost. At lower speeds, you only have a few choices in gears and you can't go lower than 1st.

In any case, if this engine uses smaller turbos that kick in at lower RPM ranges, then a lot of this matter less.
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Old 01-03-2007, 09:50 AM   #39
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better low end power+more torque and around the same weight its a close race with top end going to the 335i
top end goes to the m3, idont know what your talking about
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Old 01-03-2007, 06:27 PM   #40
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You're right about the twin turbo setup. I was thinking of BMW's twin turbo diesel engine that has a sequencial turbo setup.

However, gearing does influence the drivability of a turbo engine car. Just as an example, off line in 1st gear, the car with the higher multiplying gear ratio is going to reach a lower RPM than the same car with a lower multiplying gear ratio at the same speed. Hence, as an example, at say 40mph, one car will be at 3000 RPM vs the other car will be at 4500 RPM. If your boost doesn't kick in until 4000RPM, then having the gear ratio that gets you in that RPM range quicker will make getting into the "boosted zone" easier. Typically, the car that gets into the boost zone quicker will be faster. At higher speeds, this becomes less significant as you can choose to use a lower gear to keep your revs up, and hence in boost. At lower speeds, you only have a few choices in gears and you can't go lower than 1st.

In any case, if this engine uses smaller turbos that kick in at lower RPM ranges, then a lot of this matter less.

Oh indeed gearing changes drive ability but not actual power output of the engine. We reach agreement on that. As you said at the end BMW has elimated both of the cons of FI engines by going with this setup. Gearing can be kept the same as their NA engines because torque is available throughout the range and boost lag is non existant as well.
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