Is there a rev hang?
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From: Tampa, FL
I have owned BOTH a 07 civic SI sedan and also just purchased my 07 s2k. I know exactly what you are talking about with the REV hang. Simply put. The SI does it, the S2K DOES NOT. hope this helps.
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From: Columbia, SC
Originally Posted by jsp872 @ Jul 11 2007, 05:21 PM
I know a thing or two about the new civic Si's
and one of the major problems they had with it was the rev hang.
It is where, when you change gears, the rev kinda just chills there for a sec, and then drops.
unlike most manual cars where when you shift the rev drops right away.
i hear that it is due to drive-by-wire.
and S2000 also has drive by wire.
Do the S2000's also have a rev hang?
or gears popping out when you shift?
and one of the major problems they had with it was the rev hang.
It is where, when you change gears, the rev kinda just chills there for a sec, and then drops.
unlike most manual cars where when you shift the rev drops right away.
i hear that it is due to drive-by-wire.
and S2000 also has drive by wire.
Do the S2000's also have a rev hang?
or gears popping out when you shift?
I've had no experience with the transmission popping out of gear on any S2000.
Originally Posted by REVZ 9K @ Jul 11 2007, 06:55 PM
I think the 2004 onwards S2Ks have drive by wire, if I am not mistaken. My 06 Civic Sedan has the same rev hang problem that I hate, particularly after driving the S.
Originally Posted by spdemon12384 @ Jul 11 2007, 07:10 PM
'06 and up s2ks have drive by wire. AP2s have slight rev hang but thats because of the heavier flywheel than AP1s. It's not enough to make ya mad though. But this car has a great transmission. Don't let an almost non existant rev hang sop you from getting one.
Yes, AP2 (which designates 2004-current S2000s) do have a heavier flywheel than AP1 (2000-2003).
While the heavier flywheel does cause the engine to rev up and down slower (more inertia), I would not consider this "rev-hang" in the same sense as that caused by DBW. With DBW, rev-hang is when the engine is held form decelerating during an upshift because the DBW isn't as responsive to throttle pedal inputs as it's cable-operated counterpart. Usually a tuning/programing issue
Originally Posted by KeithMajkasays @ Jul 11 2007, 07:24 PM
Sounds like a minor problem and a relatively simple fix. By no means make that the reason for not buying an S2K. Ive had an 04 and now an 05 and have never even noticed.
Originally Posted by SIIK2NR @ Jul 11 2007, 08:18 PM
Rev Hang = CDV
This is clutch-slip.
Originally Posted by The Twanksta @ Jul 11 2007, 09:19 PM
I have owned BOTH a 07 civic SI sedan and also just purchased my 07 s2k. I know exactly what you are talking about with the REV hang. Simply put. The SI does it, the S2K DOES NOT. hope this helps.
Some good information from someone that has experience with both.
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then again...
you guys say the rev hang on the 06+ s2000 is barly noticeble
than would you guys buy the latest AP2 ?? as in '06 or '07 ??
or would you guys still stick with the '05 cuz it doesnt have the DBW
you guys say the rev hang on the 06+ s2000 is barly noticeble
than would you guys buy the latest AP2 ?? as in '06 or '07 ??
or would you guys still stick with the '05 cuz it doesnt have the DBW
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From: Miami, FL
Most DBW systems are usually somewhat noticeable. All the reviews and owners of the s2000 say the system was integreated much better than most DBW systems and it not detectable. Even being so, go drive both for yourself. Every driver notices different things and being a car is a big purchase (for most people) you should drive them both yourself and decide which you like best.
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From: Owasso, Oklahoma
I drove an 06 si for a year, even after I got the official "reflash" for the rev hang it was still noticeable. I have a 07 s2k now and there is no rev hang. You have nothing to worry about.
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Rev-hang has nothing to do with DBW. As 00CivicSi alluded, it has to do with ECU tuning. With emissions getting more and more stringent, it is getting tougher and tougher for OEMs to comply with EPA regs. The rev hang is there to burn off the last bit of hydrocarbons before it goes lean, since you're snapping the throttle shut. A mid-90s Taurus, with a cable throttle AND a flexplate (think of a flywheel with ginormous drilled holes--weighing only a few pounds) has HUGE rev-hang.
When I had my EK Civic, I swapped out to a 8.5lb Fidanza flywheel (OE was 17lbs or so, I think; someone can correct me if I'm wrong on the D16Y8 motor). I had expected revs to drop pretty quickly between shifts. Not so. It was a little better, but not much. When I swapped out to the AEM EMS--revs dropped SUPER fast. My G35C and 350Z were DBW, and the driving dynamic was exactly like that of a conventional throttle cable. It's all about ECU!
When I had my EK Civic, I swapped out to a 8.5lb Fidanza flywheel (OE was 17lbs or so, I think; someone can correct me if I'm wrong on the D16Y8 motor). I had expected revs to drop pretty quickly between shifts. Not so. It was a little better, but not much. When I swapped out to the AEM EMS--revs dropped SUPER fast. My G35C and 350Z were DBW, and the driving dynamic was exactly like that of a conventional throttle cable. It's all about ECU!
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