Well I have had my twin disk for a few thousand miles now. I love it for street driving which is most of what I do. I have an Exedy Twin HD and as most of you know the engagement is pretty grabby and violent. Under normal driving it's not so bad, but how are you guys rev match down shifting without having to baby it when letting off the clutch?

In my honda I can just step on the clutch, blip the throttle and just take my foot off and it's perfectly smooth. However on the evo if I tried to do that it has a very violent engagement even if I match it perfectly. So what are you guys doing as far as technique? Maybe I'm just too scared of breaking something, but someone enlighten me please.

 

rev matching or double clutching, if done correctly, will be the smoothest shift in any car including an evo. i do it all the time for one reason: double clutching eliminates the need for the synchros to synchronize. in other words your eliminating strain. if you have a rough engagement i hate to tell you but your doing it wrong. before synchronizers were standard you had to double clutch or just pull the tranny in and out of gears at the exact right time. rev matching still uses the synchros, however you don't have to wait for the engine, clutch, and input shaft to catch up; they'll be at the exact right speed when you switch gears. it also elongates the life of the clutch. it sounds to me you are not used to the way the evo shifts and more importantly, the timing and amount of throttle you need to rev match. experiment.

im a honda-tech myself and let me tell you some advice.. they are 2 entirely different animals. The only thing they have in common is the fact they're 4 cylinders. Driving a Honda is way different. Remember evos steer and/or drive from the rear whereas a honda drives from the front. Take a few turns in the rain above the threshold of each vehicle and you'll understand.

tell me exactly how your car responds when you attempt to rev match. do your rpms slip down or up? if so try less or more throttle. When i rev match downhill, i use one foot for the clutch and one for the brake and throttle. i can choose to hit the gas twice or once to get the engine up to speed, depending on if im in a hurry. if you still have trouble il make a video for you.

 

I know how to rev match. It's more the harsh engagement of the twindisk itself. On a normal clutch you can just pop your foot out and it's fine and dandy every time as long as you blip the right amount of throttle, the twindisk even stepping on the clutch to go into neutral the car will jerk a bit.

 

I have never had a twin disk, but why would pressing the clutch in cause a jerk?

 

Sounds like your clutch may be dragging to be honest and is not fully disengaged. Thats why so many people complain about their clutch and say ohh it locks out and its harsh, when its not that the clutch sucks, its that it wasnt set-up properly (not accusing you of that). But try adjusting it.

The way to find out if the clutch drags: put the car up on jack stands, press the clutch in all the way, put the shifter in 1st gear, and then rev up to 2-step.

Have someone outside your car, if your tires begin rolling while youre 2-stepping it, the clutch is dragging and it needs to be adjusted.

 

x2.

 

I have always drove on an exedy twin disc, i rev match on hard downshifts from 4,000rpms and up on the race track.. Never had a problem. Took some practice but its nice and smooth now.. I had to buy a clutch slave rod that was a 1/4" shorter though to get it to fully disengage

 

Hmmmm...I can hear the plates jiggling a bit when I step on the clutch. I'll see if I can get it checked out.

 

Rev higher Ken.

The lighter flywheel of the twin plate and the 2.0L vs the amount of grab and vehicle weight is not cutting it and stopping your engine rotation.

 

my excedy twin never pops, just need to rev higher to move slower if that makes sence.

 

I have a cusco twin and It took me a lil while to get use to the engagement. I just hold the throttle a tiny tiny bit down before I begin to release the clutch. That keeps the rpms from dropping to fast.
Also a question for u guys do u adjust the clutch via the pedal adjustment?

 

I have an exedy twin, I almost always rev match down shift, unless I am trying to be as quite as possible. The hard part is doing it while your braking hard from 130mph. If you release the clutch too fast or don't give it enough throttle you could get your violent engagement. Check to make sure its not dragging and work on releasing the clutch smoothly instead of quickly. The speed will come with time.

 

i have a quartermaster twin, and if you dont rev-match the rpm's pretty close, it lets you know. most of my issues are going from 3rd to 2nd.. not sure why.

start out in lower rpm's and just slowly work your way up. the higher the rpm, the larger the penalty for being a few hundred rpm's off. quartermaster isnt as smooth as the exedy twin i drove, but im slowly getting used to it.

 

It just takes some getting use to, overtime you will get the hang of it on the HD Twin, took me about a month to get it just right.

 

i have an exedy twin hd and it's almost like stock, including for rev matching..as long as u rev to the right spot and disengage it shouldn't be different from any other..

that's not to say i dont miss - when i blip too low and let it go the car will take a mini nose dive as the clutch grabs gear