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RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)
-   3rd Generation Specific (1993-2002) (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/)
-   -   Regrets Going With Lightened Flywheel? (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/regrets-going-lightened-flywheel-577777/)

scrubolio 09-17-06 05:59 PM
Originally Posted by keithrulz
i learned revmatching on accident, i was driving normaly and i was lazy or something, wasnt paying atention to what i was doing and shifted smoothly without using the clutch on an up shift, rpms fell just right. now i do it al the time when im lazy. i didnt use to know that rev matching is what i was doing, i just did it.
this is not the "rev matching" on what they are talknig about - when you do that you aren't blipping the throttle at all you are just finding that specific rpm to shove the tranny into gear. they are saying that you blip the throttle to just about where your rpms WILL BE when you downshift, to make the car shift smoothly

R_PROWESS 09-17-06 06:19 PM
Originally Posted by scrubolio
this is not the "rev matching" on what they are talknig about - when you do that you aren't blipping the throttle at all you are just finding that specific rpm to shove the tranny into gear. they are saying that you blip the throttle to just about where your rpms WILL BE when you downshift, to make the car shift smoothly

I know what they meant, i was just refering to the same process and how i came about discovering it, its basicly the same thing on the downshift just in reverse. none the less either way it is still matching the rpms with the correct gear is it not?

Mike Nola 09-17-06 09:25 PM
Originally Posted by Sgtblue
Maybe I missed something, but wouldn't rev matching, or blipping the throttle on downshift WITHOUT double clutching also tend to be easier on synchros?
Nope. If you do not put the transmission into neutral and engage the clutch then the engine is not connected to the tranny input shaft, and the input shaft speed is not increased when you rev the engine, and thus the syncros do all the dirty work of speeding up the input shaft.

Mike

Mr3plus1 09-18-06 01:49 PM
Sadly I never had a chance to really test out what a lightweight flywheel does on a clutch I already knew. When my clutch finally started to eat the rivits (138k miles) I replaced everything. I went with a 4puck sprung Spec clutch and a racingbeat 9lb flywheel. It was pretty chattery and required reving from a stop just to not buck/stall. The clutch was garbage and blew up on me at the 12k marker. I replaced it with an ACT 6puck sprung clutch. I still have to rev up from a stop and its still not smooth, but a lot smoother than the 4puck. It squeeks when I engage in 1st though. I dunno what thats all about.

DamonB 09-18-06 02:21 PM
Originally Posted by FDNewbie
It bewilders me that ppl don't revmatch, but it seems that (from my experience), the vast majority of ppl do NOT do it, let alone know what it is. I guess it's one of those things that you're only exposed to when you track your car? :scratch:
There is absolutely no real reason to rev match a modern manual transmission unless you're on the track at 10/10ths. It's also another one of those things everyone insists they can do and yet the far majority suck at it ;)

FDNewbie 09-18-06 09:37 PM
Damon, do you remember how hard the car jerks when drop a gear w/o rev matching? I do... If you don't think that causes any additional wear and tear, I beg to differ.

GoodfellaFD3S 09-18-06 09:53 PM
The 'wear and tear' factor notwithstanding, it just looks and sounds like crap.

FDNewbie 09-18-06 09:55 PM
Not to mention it's jerky as hell.

gracer7-rx7 09-18-06 10:07 PM
^^Try not heal-toe downshifting it in the rain heading for a turn. Its lots of excitment then.


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