Hey guys, is down shifting bad for your car? like going like 45 then down shift to like 4th then 3rd n so on...

 

not really but it can really wear your gear if you don't rev match.

 

it's not bad if you need speed. Just be aware of how fast you're going and make sure you have the rpms to downshift (you don't want to redline on a downshift). When it comes to slowing down like at a light, don't bother shifting down every gear as thats what you have brakes for

Rev matching is also pretty much eliminated in newer cars. Gears in our car auto sync when you downshift. But revmatching is still good practice for smoother transitions.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ScuDC5 &raquo;</TD></TR><TR><TD CLASS="quote">Rev matching is also pretty much eliminated in newer cars. Gears in our car auto sync when you downshift. But revmatching is still good practice for smoother transitions.</TD></TR></TABLE>
Matching the gearbox internals' speeds involves double clutching.

Matching the engine speed to road speed involves simple rev matching -- clutch in, shift & gas, clutch out.

Synchros wear out, and it's always a good idea to minimize driveline shock anyway. On the street, I have enough time to double clutch & rev match. If I downshift while braking, I try to always heel-toe to match revs.

I could go on, but I'd rather not; I need some sleep.

 

i kno this is a noob question, but like, what is double clutching, i never really understood the concept, can someone take the time to explain how to do it and what it is???

 

Double clutching adds a third step into the mix. The shifter, rather than going straight to the next gear, makes a stop in neutral and then the clutch is released. This is to allow the engine to slow down (or with a tap on the gas, speed up when downshifting) so the transition into the next gear is much more smooth. The driver then depresses the clutch again and completes the shift into the target gear, and finally the clutch is released again, putting the car back into gear. It only takes a split second for the engine speed to match the speed of the gears, so the entire action is done very quickly as a fluid sequence of events.

There is really no need for it on modern street cars, since todays transmissions are all synchronized. If the synchros go out, then youll pretty much have to do that.

 

depends on what ur doing....

 

DOWNSHIFTING IS FINE JUST WATCH WHAT GEAR YOU PUT IT INTO. IF YOUR SHIFTING FROM 6TH AND BY ACCIDENT PUT INTO 3RD (HAVE SEEN IT MANY MANY TIMES) YOU CAN BENT YOUR VALVES.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CASTUDILLO01 &raquo;</TD></TR><TR><TD CLASS="quote">DOWNSHIFTING IS FINE JUST WATCH WHAT GEAR YOU PUT IT INTO. IF YOUR SHIFTING FROM 6TH AND BY ACCIDENT PUT INTO 3RD (HAVE SEEN IT MANY MANY TIMES) YOU CAN BENT YOUR VALVES.</TD></TR></TABLE>

You know thats funny cuz at the dealership where I bought my 06 type S said that there is no problem going from 6th to 3rd, Acura had redesigned the trans to handle it. So on the test drive I went from like 65 mph in 6th and put that bitch in 3rd, she took it but it banged like a ****. But yea in todays transmissions you do not need to double clutch and rev match, if you were in a race car with a non-syncro transmission, then yes.

 

3rd gear on a type S can take it up to about 80mph, if you're above that, you're going to bust through red line. Just know how fast you can go in each gear and you'll know where you can downshift to, for my 03 w/ Kpro:
1st: 20mph
2nd: 60mph
3rd: 84mph
4th: 105-10mph
5th: ???? dunno, normally beat most people in 3rd or 4th
6th: ditto..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ScuDC5 &raquo;</TD></TR><TR><TD CLASS="quote">3rd gear on a type S can take it up to about 80mph, if you're above that, you're going to bust through red line. Just know how fast you can go in each gear and you'll know where you can downshift to, for my 03 w/ Kpro:
1st: 20mph
2nd: 60mph
3rd: 84mph
4th: 105-10mph
5th: ???? dunno, normally beat most people in 3rd or 4th
6th: ditto..</TD></TR></TABLE>
The interesting thing is that on an EP3's 5-speed tranny, the top speeds in each gear are almost exactly the same.

I always check the speedometer before deciding on a downshift (something they would teach in the first five minutes of a "Downshifting 101" class). If it's above 50, I might not bother going down to 2nd.