rev matching

[uEih]

Originally Posted by qqzj

Anybody can give a table between gears and rpm's? I read the whole discussion and I am still at a loss. (suppose we downshift by 1 or 2 gear each time).

When I downshift 1 gear a full stab at the gas usually gets me to the right rpm. Usually it's about a 1k rpm difference down a gear.

[qqzj]

Thanks. I see. So typically just put it to 3k should be fine. On freeway, maybe make it 4k.

Originally Posted by uEih

When I downshift 1 gear a full stab at the gas usually gets me to the right rpm. Usually it's about a 1k rpm difference down a gear.

[SuiSid3l]

I've rev matched for so long in a manual for normal driving it just feels wierd to NOT do it. I honestly don't think I even know how to downshift w/o it anymore.

Bonus points if your in love with your cars exhaust note, b/c you get to hear it all the time.

[Marcoscrdo]

rev matching only good before a turn or can be used anytime? like a stop sign or yielding turn?

[chrisl]

Rev matching is good any time you shift.

[strat61caster]

Originally Posted by Marcoscrdo

rev matching only good before a turn or can be used anytime? like a stop sign or yielding turn?

If you're downshifting you should bring the motor up to the appropriate rpm's to make for the smoothest ride and minimize clutch wear.

If you just clutch in from fifth gear down to a stop that's fine too.*

*waits for the heel-toe-downshift brigade telling me how this is unsafe

[RallySport Direct]

Originally Posted by Marcoscrdo

rev matching only good before a turn or can be used anytime? like a stop sign or yielding turn?

I think it is a good thing to do all of the time for a few reasons.

If done correctly it can increase the life of the clutch and brake pads, essentially using the engine to decelerate.

Perhaps a small bump in fuel economy as IDC %'s will be 0 with the car in gear and decelerating.

It's fun and is great practice. I always feel like a pro racer when I can execute quick rev match downshifts perfectly. I rev match every single day, and 85% of the time they are perfect... we don't talk about the other 15% haha.



Thanks!
Rick

[moomoopanda]

I find rev matching and heel-toe-ing on the daily makes for good practice. It'll become natural and a habit if you ever track your car...

[SuiSid3l]

Having an appropriately sized gas pedal makes a world of difference too IMO. Have the CUSCO pedal addon in my FR-S and it made all the difference on the ease of hitting that rev might consistently.

[daiheadjai]

I find 2nd gear is a bit harder to downshift into smoothly - I double-clutch (just force of habit - it feels more natural to me than a regular rev-match now), and I'm great with 6-5, 5-4, and 4-3 downshifts, but 2nd always seems to lock a bit for me - I feel like the throttle just doesn't behave quite the way I want it to (didn't have this problem in my 02 Celica) - is it possible that the drive-by-wire throttle just isn't as linear?

I feel like I really need to stomp it in order to get 2nd smooth...

Incidentally, if you've ever had to slow down rapidly in a straight-line in traffic, heel-toe might be handy, as you can maintain braking while simultaneously downshifting (benefit from engine braking as well as being able to accelerate quickly if the situation calls for it) - this is a piece that I still need to learn.

[bkblitzed]

you know you rev match/heel and toe too much when you just do it for fun

[_______]

Originally Posted by daiheadjai

I find 2nd gear is a bit harder to downshift into smoothly - I double-clutch (just force of habit - it feels more natural to me than a regular rev-match now), and I'm great with 6-5, 5-4, and 4-3 downshifts, but 2nd always seems to lock a bit for me - I feel like the throttle just doesn't behave quite the way I want it to (didn't have this problem in my 02 Celica) - is it possible that the drive-by-wire throttle just isn't as linear?

I feel like I really need to stomp it in order to get 2nd smooth...

Incidentally, if you've ever had to slow down rapidly in a straight-line in traffic, heel-toe might be handy, as you can maintain braking while simultaneously downshifting (benefit from engine braking as well as being able to accelerate quickly if the situation calls for it) - this is a piece that I still need to learn.

Agreed downshifting to 2nd gear is quite tricky. Even if you stomp on it its smoother but still feels weird. Dont know about everyone else but I find it hard to rev match 2nd gear. My old RSX used shift smoothly into 2nd with a rev match. I really dont bother with downshifting to 2nd cause luckily I found 3rd gear quite adequate in the 10-15 MPH range. Or Id just stop and start from 1st.

[uEih]

Originally Posted by qqzj

Thanks. I see. So typically just put it to 3k should be fine. On freeway, maybe make it 4k.

I'm not sure what you mean by this. If you're on 4th and wanna go to 3rd, usually if you're around 2k rpm you give it a quick rev and bring it up to around 3k or just before it and the rpm should match.

[uEih]

Originally Posted by daiheadjai

I find 2nd gear is a bit harder to downshift into smoothly - I double-clutch (just force of habit - it feels more natural to me than a regular rev-match now), and I'm great with 6-5, 5-4, and 4-3 downshifts, but 2nd always seems to lock a bit for me - I feel like the throttle just doesn't behave quite the way I want it to (didn't have this problem in my 02 Celica) - is it possible that the drive-by-wire throttle just isn't as linear?

I feel like I really need to stomp it in order to get 2nd smooth...

Incidentally, if you've ever had to slow down rapidly in a straight-line in traffic, heel-toe might be handy, as you can maintain braking while simultaneously downshifting (benefit from engine braking as well as being able to accelerate quickly if the situation calls for it) - this is a piece that I still need to learn.

I rarely downshift to 2nd, it's always too harsh. I go 3rd for the lowest most of the time.

Originally Posted by bkblitzed

you know you rev match/heel and toe too much when you just do it for fun

Rev matching is fun, just makes it that much more fun driving the car. Heel toeing however I find difficult still, never started heel toeing until this car so it's gonna take some practice.