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10-03-2011, 05:52 PM | #2 |
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10-03-2011, 06:48 PM | #3 | |
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The 300HP/300TQ for the 35i are underestimated by BMW to begin with. The 35i already been dynod. Crank HP is estimated at 332. TQ at 332....and it's been posted in this forum. The 35is HP and TQ are higher than what BMW claim too. So, no need to worry where the 28i is dynod. Last edited by BlueZ4AZ; 10-04-2011 at 10:27 AM.. |
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10-03-2011, 06:51 PM | #4 |
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Yeah their numbers are at the wheel.
So if there is around 10-15% loss, this engine has more like 256-268hp?? Last edited by totoro; 10-03-2011 at 06:57 PM.. |
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10-04-2011, 12:43 AM | #5 | |
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Did anyone notice if they had an air fans facing the radiator? BMWs are sensitive to air temps and engine temps and will retard the power curve if almost freeway-like air flow conditions are not met at the simulated speed.
Here's quote from Dinan's website: Dynamometer Testing and The Modern BMW Engine Quote:
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10-04-2011, 10:25 AM | #6 | |
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All 3 engines are getting way more HP to the wheel than would be expected, given the crank HP BMW claims the engine has. |
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10-09-2011, 09:52 PM | #7 |
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This is way more to the wheels than even the n52 255hp version put down. Seems this little 4 banger is very strong.
What I do not get is why no NA I6 engine was ever under rated by bmw and they always dyno low if anything. yet every TT engine they put out seems to be way under rated. |
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10-10-2011, 01:48 PM | #8 | |
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Last edited by BlueZ4AZ; 10-10-2011 at 04:31 PM.. |
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10-11-2011, 09:39 AM | #9 |
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Man, I was just looking up the specs on the N20 vs. N55 on bmwusa's website. for 7K less, you get a vehicle that is only 0.5 sec slower to 60 and likely gets 3-4 better mpg and carries less weight over the front axle. Not to mention u can get the exact same sport/msport pkg it prob handles slightly better.
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10-11-2011, 09:42 AM | #10 |
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the n55 is in desperate need of an upgrade to 320-330 hp/325 lb ft now not only to compete with audi's 3.0SC, but its own N20! and none of this performance pack BS.
Maybe they're waiting to debut the new V6 block on the f80 m3 and they'll come out with a detuned single twin-scroll set up for the _35i models.
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10-11-2011, 12:24 PM | #11 | |
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Last edited by BlueZ4AZ; 10-11-2011 at 12:35 PM.. |
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10-11-2011, 12:27 PM | #12 | |
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If BMW was worried about 4 cylinder Z4 sales cannibalizing Twin Turbo sales, they probably never would have put a 4 banger in the Z4. The performance gap is plenty wide enough for the 4 cylinder not to impose any kind of threat. There will still be an ample number of people that will prioritize performance and select the N55 Turbo. Last edited by BlueZ4AZ; 10-12-2011 at 04:52 PM.. |
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10-11-2011, 10:37 PM | #13 | |
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it's a matter of opinion of course, until sales numbers come out. if you're truly going performance it's 35is all the way; the specs comparison between a n55 and n20 powered z4 is not, say, as big a difference as an s5 3.0sc vs a5 2.0t
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10-12-2011, 08:50 AM | #14 | |
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ie. If you go test drive a 2 ton Infiniti G Convertible, then compare it to both a 35i and 35is, then the very fine line where "true" performance begins and ends becomes even blurrier. We had a G Convertible as a loaner last week while our EX35 was in for service. What a boat!!!! I'd have to slide this hypothetical fine line separating the "true" performance convertibles/roadster, from smack in between the 35i and 35is, to down below the 35i, and definitely somewhere between the 35i and the Infiniti G. Exactly where the line falls, with there being numerous other makes and models of convertibles on the market, I am not in any position to determine myself, nor is anyone else, since we've not test driven every make and model out there. Based on where the N54 engine Dynod, the majority consider a huge HP difference between the N54 in both 35i/35is and the 28i. A 60 - 95 HP difference in this HP range is significant. Unless the N55 is dynod and it's true HP at the crank is estimated at "only" 300, there will continue to be a signifigant power gap. The majority will agree that we are just not at a stage where people are going to select the 4 cylinder as their "performance" choice. The sales numbers alone are not going to tell the whole story. Basic economics says that more of the less expensive model (28i) will sell. Last edited by BlueZ4AZ; 10-12-2011 at 05:18 PM.. |
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