rev matching

[forreal]

sorry to keep bothering you guys with questions after questions, but i need some help with rev matching..for when downshifting i cant seem to get a smooth shift my car always kicks back...can someone please tell me what the correct way is to rev match while downshifting? thanks

[B5]

Re: rev matching

The smoothness of downshifting is very by the elevation the car is traveling. Use more brakes than downshift to slow down the car. FYI, $2500 clutch job vs $1000> brake job.

[forreal]

Re: rev matching

but say for example your in 3rd doing about 50km/h and you put it into neutral beacuse you see the light is red and then your speed drops to about 25km/h and you see that the light turned green and your good to go again, then you would have to put it into 2nd but when i do that my car jerks...everyone told me to get rid of my habit of putting it into neutral and using the brakes to slow down as it isnt a good habit, so thats why i want to become better at downshifting...thanks

[NeonGTI]

Re: rev matching

To double-clutch to accelerate:

Zero throttle, clutch-in, neutral, clutch-out, rev higher than expected, clutch-in, select gear, throttle to desired level, clutch-out.

This makes for very smooth non clutch eating shifts for acceleration. It also gives a higher feeling of acceleration.

To double-clutch to decelerate:

Zero throttle, clutch-in, neutral, clutch-out, rev just slightly higher than expected, clutch-in, select gear, gentle clutch-out.

This gives you smooth downshifts, the benefits of engine braking and pad braking and near zero clutch wear.

I've been double clutching religiously for about 15 years and I have never once replaced a clutch or brakes on a car I have had. I've had cars between 30k and 150k km's. As I have stated previously I am NOT nice to cars.

Also, you will need some patience with the 1.8t's as they are not particularly willing to rev from a zero throttle position.

[100%VAGitarian]

Re: rev matching

you really need to know your car. things like how fast the motor is turning at a given speed for the few gears that you can choose from in that window. it takes time and practice is the only way. i think that shifting into neutral and using your brakes to slow is stupid. #1. you no longer have control over your car meaning you cant hit the gas if an emergency situation arises. there is now no link between your cars ability to react and the road, other than slowing down more. #2. it kills your brakes. dont you just love driving behind the moron who cant seem to get anywhere cause they constantly tap the brake?

these are crude numbers but try to use the example. say you are traveling at 50kms in third gear. lets say 2200 rpm. if you were to downshift right there into 2nd, your rpms would rise up to say 3500, giving you that jerky feel. now as you step on the clutch to do this, rev the engine to that 3500rpm mark and then let the clutch out. no jerking and now you are in that nice powerband your engine loves so much, with a smooth shift. try this approaching a light with ample space to stop and then let the gears slow you down. press the clutch when you are about to stop. downshifting hurts the clutch no more than upshifting. the clutch doesn't slow you down. its the different gears that do.
i've replaced brakes once and am still on the original clutch in my car. 150000 kms. i changed the brakes cause the chick i bought it from rode them. its a '99.


oh ya, for all those out there who this applies to, take your foot of the clutch if you are just coasting, sitting at a light in neutral, whenever you choose to slow with brakes only(???) its that kind of habit that causes premature wear on the clutch components. i keeps you from having that 1000 breake job and 2500 clutch.

good luck. pm me and i will gladly show you.



...i need to learn to type faster/\/\/\...

[Kor]

Re: rev matching

IMO double clutching is super hard on a Mk4 VW. I can't do it.

You can rev match by feel, just get used to the amount you need to blip the throttle to bring up the revs when downshifting. Its not consistant between gears so you will need to blip it differently depending on if you're going 5-4 or 4-3 or 3-2.

My clutch has lasted but I figure if it goes it goes. It doesnt cost 2500 bucks (an exaggeration) and I will put in a Stage II Spec that will work better and last longer.

[forreal]

Re: rev matching

alright thanks guys...i know using neutral and then using brakes to slow down is the dumbest thing to do, and that is why Im trying so hard to learn how to properly down shift...thanks guys for the suggestions/tips...i guess it also takes some time to get to know your car really well...but again thanks

[NeonGTI]

Re: rev matching

IMO double clutching is super hard on a Mk4 VW. I can't do it.

You can rev match by feel, just get used to the amount you need to blip the throttle to bring up the revs when downshifting. Its not consistant between gears so you will need to blip it differently depending on if you're going 5-4 or 4-3 or 3-2.

My clutch has lasted but I figure if it goes it goes. It doesnt cost 2500 bucks (an exaggeration) and I will put in a Stage II Spec that will work better and last longer.

Agreed. Althought I was pretty good at it with my 00 1.8t Passat the 180 hp 1.8t's don't seem to have the same throttle response.

A 1.8t with a lighter flywheel would be a lot easier to control, I figure.

Among the other surprises I had when I test drove a Golf TDI last week was how super easy it was to match up a double clutching. I didn't think it would be nearly as revvy as it was.

[forreal]

Re: rev matching

To double-clutch to accelerate:

Zero throttle, clutch-in, neutral, clutch-out, rev higher than expected, clutch-in, select gear, throttle to desired level, clutch-out.

This makes for very smooth non clutch eating shifts for acceleration. It also gives a higher feeling of acceleration.

To double-clutch to decelerate:

Zero throttle, clutch-in, neutral, clutch-out, rev just slightly higher than expected, clutch-in, select gear, gentle clutch-out.

This gives you smooth downshifts, the benefits of engine braking and pad braking and near zero clutch wear.

I've been double clutching religiously for about 15 years and I have never once replaced a clutch or brakes on a car I have had. I've had cars between 30k and 150k km's. As I have stated previously I am NOT nice to cars.

Also, you will need some patience with the 1.8t's as they are not particularly willing to rev from a zero throttle position.

yeah i been practising for 2 days now, i think im started to get it
thanks guys