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View Full Version : Tach Rev Problem?? Maybe not??

Oake
09-28-2005, 08:41 PM
Hey guys ... I've only had my '05 TSX (6spd) for a little over a month now and have noticed something I'm not actually sure is a problem, or just a normality with the TSX ... I'm coming off of an 03 RSX Type-S ... so maybe I'm comparing the 2 a little too much ... anyhoo (hope I can explain this properly) ... when I go to change gears, I notice the RPM's don't drop nearly as fast as they did in the RSX ... they kinda hang for a sec (or eternity it seems) ... I haven't changed my driving style ... so I'm wondering if it's normal, or if something else is going on ...

... opinions? ...

Oake
AcidLotus
09-28-2005, 09:09 PM
heavier flywheel than in the RSX, that is my guess... that or the rotating mass of the larger stroke.
FASTSX
09-28-2005, 11:36 PM
i noticed that my car does that as well
Noel
09-29-2005, 03:16 AM
Flywheel weight (as mentioned above), gearing ratios, throttle type (drive-by-wire) ... Just some of the different factors.
AcidLotus
09-29-2005, 01:47 PM
gearing ratios shouldn't affect the rev time while the clutch is depressed.
Noel
09-30-2005, 12:13 AM
Gear ratios particular to the applicability of the final gear allows the revs to either shift earlier or later depending on the calculated figure. The rev time is definitely affected by this.
AcidLotus
09-30-2005, 12:42 AM
gear ratios, including the final gear are in the transmission. When you depress the clutch, you are disengaging the engine from the transmission, leaving the engine spinning down freely. Final drive has nothing to do with it unless the clutch is engaged. For the purposes of the original poster's question, he has a 6MT and is saying that the revs go down slowly when between changing gears, meaning while the clutch is depressed.
Oake
09-30-2005, 11:40 AM
Is it possibly because the RSX has a smaller, slightly more tuned engine?

Oake
aaron33
10-14-2005, 10:46 AM
It's the electronic throttle. In order to meet the emissions requirement, the engine cannot release unburnt fuel out the exhaust. So when you lift your foot off the accelerator, the revs actually rise a bit to burn the remaining fuel that was sprayed from the injectors before being stopped.