High Revs in the Fit
#22
very true. my first car didnt have a working tach, so i learned to drive that way. I rarely look at the tach now either. once you are super comfortable you will drive my sound. occasionally i will if i am REALLY trying to get as close as possible to red line, but not usually. ive only ever hit the fuel cutoff like twice... out of the hundreds of times ive wrung it out.
#23
It's interesting. I've noticed that every SOHC Honda I've driven (the Fit included) has a considerable delay between hitting the clutch and the RPMs falling between shifts. In my DOHC CRX, you hit the clutch, and the revs start to fall _immediately_. You have to shift fast or you'll miss the correct RPM for the next gear. However, if you shift at a much higher rev, the RPMs will fall much sooner, as though it knows you're trying to race. I'm sure there's some physics involved that would explain this. Personally, I wish the RPMs would fall a bit quicker between shifts when driving leisurely. I don't like having to wait a second or more before re-engaging the clutch.
#26
make vids sorry guys im more a visual learner and i want to knw if anything is wrong although i only drive stick and my only track car i every had was and Ep3 which had a dohc but im not so sure bout sohc ivtec engines please also enlighten me thank you
ill also try to make a vid for myself
ill also try to make a vid for myself
#27
It's interesting. I've noticed that every SOHC Honda I've driven (the Fit included) has a considerable delay between hitting the clutch and the RPMs falling between shifts. In my DOHC CRX, you hit the clutch, and the revs start to fall _immediately_. You have to shift fast or you'll miss the correct RPM for the next gear. However, if you shift at a much higher rev, the RPMs will fall much sooner, as though it knows you're trying to race. I'm sure there's some physics involved that would explain this. Personally, I wish the RPMs would fall a bit quicker between shifts when driving leisurely. I don't like having to wait a second or more before re-engaging the clutch.
make vids sorry guys im more a visual learner and i want to knw if anything is wrong although i only drive stick and my only track car i every had was and Ep3 which had a dohc but im not so sure bout sohc ivtec engines please also enlighten me thank you
ill also try to make a vid for myself
ill also try to make a vid for myself
Last edited by SSMTEN; 09-14-2011 at 04:15 PM.
#28
Yeah I'm referring to the older CRX's and Civic's I've driven, which are obviously cable throttle. Drive by wire is a whole 'nother animal I am not fond of. The rev hang on the older cars could've been due to ignition timing being off though... Always seem to end up with cars missing the lower timing belt cover :/
#29
he was talking about the revs dropping when you disengage the clutch, so nothing to do with drive-by-wire or electronics, also it's a CRX
Last edited by doctordoom; 09-14-2011 at 04:33 PM.
#30
Actually, drive-by-wire does effect the revs dropping after disengaging the clutch. If you are used to driving a "normal" car, you would typically let off the throttle and disengage the clutch at about the same time to prepare for a shift. Typically this would immediately close the intake valve, and the engine would start revving down. Drive-by-wire systems tend to add a bit of "throttle lag", so that when you let off the gas, the car may take a second or so before it actually closes the intake valve. Not only does this sometimes introduce rev hang, but in some cases the engine will actually accelerate before starting to decelerate since there is a period of time where the clutch is disengaged but the drive-by-wire system hasn't actually closed the intake yet. This is especially present in Scion TC's. The throttle lag (both for pressing and letting off the gas) is enormous, and makes shifting extremely tiring.
#32
..another reason we need a re-flash available. (there still isnt one available for us right? i havent been keeping up as much lately. might have missed something)
#33
JC is right about rev lag being controlled by the ECU... I had forgotten all about it until seeing this thread... My ECU was reflashed by Hondata early last summer as part of the KWSC high boost kit.
#34
Actually, drive-by-wire does effect the revs dropping after disengaging the clutch. If you are used to driving a "normal" car, you would typically let off the throttle and disengage the clutch at about the same time to prepare for a shift. Typically this would immediately close the intake valve, and the engine would start revving down. Drive-by-wire systems tend to add a bit of "throttle lag", so that when you let off the gas, the car may take a second or so before it actually closes the intake valve. Not only does this sometimes introduce rev hang, but in some cases the engine will actually accelerate before starting to decelerate since there is a period of time where the clutch is disengaged but the drive-by-wire system hasn't actually closed the intake yet. This is especially present in Scion TC's. The throttle lag (both for pressing and letting off the gas) is enormous, and makes shifting extremely tiring.
#35
bull ill show u the fastest reving fit, the dbw doesnt rev hang.... with straight exhaust and high flow intake my fit is super throttle responsive.... then i got a pretty nice flywheel with a decent amount of weight removed... my fit is crazy and i dont have a throttle controller... i dont believe in it sorry.
#37
Ah gotcha. Out of curiosity, how does the ECU help with EPA BS by causing rev hang? By making it less fun to drive? lol
#38
It just makes em feel better by effing us in the A with stupid standards that are complete BS. Put that crap on a prius, don't put it on my car and if you do give me the option to take the shite off!
#39
From what I remember when it was discussed this on the forums a few yrs ago, it has something to do with burning off the excess gas in between shifts.
see these threads for more info :
https://www.fitfreak.net/forums/2nd-...-response.html
He's right. If the throttle plate were simply to slam shut (like on most cars), the engine would run very rich for a second. You will notice a hang or even a small bump in rpms when you let off (esp in M/Ts) as the fit motor burns all the fuel to lower emissions and preserve parts.
I just forced myself to get used to it. Hey, I'm saving the f'n planet here.
I just forced myself to get used to it. Hey, I'm saving the f'n planet here.
https://www.fitfreak.net/forums/2nd-...hang-5mts.html
#40
i believe sprint cup racing cars top out at 10,000,7000 sounds good for a street car lol and it has half the cylinders go figure