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03-29-2011, 10:40 AM | #23 |
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I am excited. I'm sick of being so cautious about how high I run the engine. It makes me have a sort of uneasy feeling about driving, not making me perfectly comfortable in the car because I'm always worried about where I am on the tach. As you know, the car starts to rev pretty damn quick once at 4k. So i'm excited to just have the car and all its power available
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03-29-2011, 12:41 PM | #24 | |
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And that was exactly my thought about the RPM.... in a car with an 8600 red line, who cares if you're at 3750 (I think thats where the 3.65 puts you) versus 3500 at 80..... there's plenty of room left.....
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03-29-2011, 12:43 PM | #25 | |
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I will do a highway run later today and tell you my rpm in 7th @80mph... |
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03-29-2011, 01:04 PM | #26 |
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Awesome, yeah I'd be interested to know instead of just throwing out estimated calculations
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03-29-2011, 03:06 PM | #27 |
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Just plug your diff, tires and gear into the RPM/MPH spreadsheet here:
http://www.diffsonline.com/techinfo/index.shtml Those with DCTs will be able to do only 6 gears at a time, but for this discussion, the issue seems to be just one gear, the top gear, and that can be plugged into the 6th spot even though it is the 7th gear. |
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03-30-2011, 02:28 PM | #28 | |
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Ok went for a ride. 7th gear 80mph I am at exactly 3500 rpm... Last edited by stega; 03-30-2011 at 03:22 PM.. |
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03-30-2011, 04:26 PM | #29 | |
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EDIT: I went and looked. You do have a 3.45, but is that from Dinan? You didn't write Dinan in front of it like your other Dinan stuff. So I'm still thinking 3750 maybe for the 3.62 at the same speed... or am i way off?
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06-28-2011, 07:15 PM | #30 |
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Related to the previous posts - anyone have any thoughts on the below e90 M3 upgrades. I've read the various posts regarding "overreving" with the 3.62 FD, and that the Dinan software doesn't correct for this (?). I have not found anything regarding whether this issue has been corrected, on Dinan's webpage or any other posts/internet sources. And there still seems to be conflicting information on whether this is a good way to go (?). Does anyone have any recent information about this, or have a new opinion? I'm like 3.62 (14.9% torque increase), and think it would offer the "response," I am looking for, but wouldn't want to sacrifice engine life? Here are the the mods considering:
HP Torq Base 414 295 Dinan Cost Trottle Body 7 5 $2,499 PerfTuning 9 8 $999 BMW middle 23 21 $2,699 Drive Pulley 11 7 $549 Total: 464 33 FD 3.62 (14.9%) $2,999 Total Gain & Cost: 464 386 $9,745
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06-28-2011, 09:24 PM | #31 |
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That's about the cost of the VT1-535 ESS tune installed. ( 535Hp plus).
Sorry but couldn't help but insert that option......
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06-29-2011, 03:15 AM | #32 |
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Uhhh no, it does not. Did you read the threads in the links rldzhao provided? A FD mod may get you one tenth to 60. ONE TENTH. It is basically in the noise or a drivers race.
FD mods can make a car feel faster but not really faster by any significant amount. There has not been a single instrumented and statistically significant test showing any real world gains from FD mods for this car. Just a lot of folks justifying their huge expenses with "it feels awesome" "X % more torque", etc. There is no such thing as a free lunch. If all a FD did was to give you more wheel torque you would simply increase it to some absurd level and have a magic car with infinite (or near infinite) wheel torque. Until you understand why this does not work you shouldn't waste your money. Hint it is not just mpg as to why the OEMs do not do this. It is about time averaged power. Get some pulleys or a cat delete or software, these are the biggest bang for the buck mods that will give more power and thus more performance.
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06-30-2011, 03:56 PM | #34 | |
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You will spend more time at a higher RPM point than you would with the OE gears, but that doesn't equal overrev. It just means that you will use more gas and potentially wear the engine (a little) faster. No one asked my opinion, but I don't think that the torque modification you get from the shorter gears is worth the fact that you will be able to spend less time in each gear, necessitating more shifting if you are trying to get a faster quarter mile time or whatever. On a real track, I think there are some benefits because you can take advantage of that extra torque when coming out of corners, etc. But in a straight line speed competition, like swamp said, you arent gaining much with the rear end. You are better off getting the pulley, a filter, the x-pipe, and getting a good tune to maximize the benefits from your mods. I would skip the gears and the throttle bodies. Also, for the middle, you may want to look at a Turner test pipe. I think its like $399. |
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07-04-2011, 02:22 PM | #35 |
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My biggest complaint was the kick down over rev..however, recently BMW called me about a recall for DCT software. Now the kick down problem is gone...sweet
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07-04-2011, 07:17 PM | #37 |
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07-07-2011, 05:00 PM | #39 |
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Just wanted to chime in. Dinan has always been quick to return my emails when I had questions about their products. Yet every time I've contacted them about potential dct issues or possible firmware upgrades for the dct when paired with their LSDs, I get zero responses.
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07-07-2011, 08:06 PM | #40 | |
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Dido on "Dinan Response"
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07-07-2011, 10:19 PM | #41 |
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Think the 3.62 would be too much, get the 3.45. Have over 20k on it with over 15 track days as well and have had zero problems and really love it for city and track driving. Personally think the 3.62 is pushing it and think the 3.45 is more than enough. Btw, "worth it" is a reactive term.
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07-07-2011, 10:49 PM | #43 |
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Bummer so that implies that there is indeed an issue with the 3.62. Pretty shady for them to not acknowledge it though. Wouldn't have expected that from Dinan. Kinda lessens their credibility to me.
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07-10-2011, 03:27 PM | #44 | |
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