can u guys tell me what RPM i should blip to at each gear when i rev match?
THanx

 

would u like to explain wut is rev matiching and how to do it??

PLZ PLZ

 

sorry guys, i just got my answer from other's reply, hab not been here for few days, sorry, but if u guys who can make it more clear, i really appreciate that, thank u

 

If you're talking about what I think you are, you can't go by numbers, because it depends on your speed at the time. You just have to go by sound and feel, and if you're really bad at it, by smell.

 

....by smell and by G-forces.

WayneTN

 

yeah can't really give you hard numbers... depends on the speed your going and at what RPM your at. For example i'm cruising on 3rd gear at 2500rpm.. i want to pass somone up in a Porsche ... press the clutch.. rev to about 3200- 3500rpm or so.. then go down to 2nd gear. Its all one smooth, quick motion. I practice when i'm coming off the freeway. Just takes time and you gotta FEEL your car. I do it with out looking at the tach now.. just by listening and feeling.

 

By touch brotha

Seriously, i find 1500rpms works pretty good as a reference. When your revs are lower and your coasting down then you dont need as much blip, when your downshifting without slowing down, or right after you get on the brakes (ie, right away) then more blip is required.

For practive, when cruising on the freeway or some strit road, shift from higher gear to lower, to higher ect (5-4-5-4). Then try it for different gears....2nd requires alot of blip, so only when your comming close to a stop.

Just go practive getting it down, it takes a while to get perfect, but once you get a good feel for it, you thank god you bough the 6-speed.

 

can you mess anything up by under-revving or over-revving?

 

Ok, my question: Does rev matching increase your 1/4 mile time and if so....how much?

 

Lokeey: you wouldn't use rev matching in the quarter. s9am_me kind of put it best: you might use it in a situation where you want to pass someone. Say you're in fifth gear, and you downshift to third gear so you can accelerate faster, you'd rev match during when you downshift so it's smoother and the car doesn't jerk.

 

alrite, so REV maching = hit clutch, hit gas to certian rev, down shift and then release clutch?? is that rite? and is there other way to do it??

 

You got it! Like everyone else is saying, it's mostly by feel. Keep practicing and soon it'll be second nature to you.

 

Oh, I guess I do it and did not even know it

 

There was a pretty good site on the net with a description of heel-toe downshifting - www.turnfast.com. I haven't been able to access it lately (get an error 400 message) and don't know what happened to it. Also, someone posted a pretty good thread on the subject about a month or so ago. Told you how to practice step by step getting started in your drive. Search the board and you'll probably find it.

As to the match points - Nissan published a graphs of Velocity vs. RPM for each gear in the sales brochure for the Z. You could memorize the graphs. or try to read the brochure as you downshift It does give you the ability to compare velocity vs engine speed. For instance in 3rd at 60 mph you're at about 4500 rpm, drop it into 2nd and you'd match revs at about 6600 rpm and.... you're at redline. So, you wouldn't want to drop from 3rd to 2nd at much more than 60 mph. Without the rev match the cars really going to jolt if you drop back at that speed. You could start a spin. However, at 60mph in 5th gear you're at about 2800 rpm, dropping to 3rd gear you'd rev match at about 4200 rpm. Not as much of a blip as the 3 to 2. You don't have to hit the exact matching rpm, but the closer you get, the less of a jolt. Less jolt on your engine, tranny, rear and most importantly traction.
A downshift is typically made while braking, so you are dropping speed, which changes the match to a point lower on the graphs. Only a blip might be needed to match. But, if your purpose is to downshift for a pass, then your not braking and the graphs are a good picture of what's needed for a match.

At least that's the way I understand it.

 

thank u guys.....^^ just one more question, when u do rev matching, u go hit clutch, hit gas to rev, down shift and then release clutch. my problem is "after u hit gas and then down shift, does that mean u need hab a very quick HAND??

oh and u also need to release the clutch in the same time after u down shift, i wonder if u hab not done all these steps fast enough, the rev is still gonna DROP, am i rite? i am a newbie, when i down shift, i usually go " hit clutch, down shift, then release clutch and hit gas at same time" , am i doing rite thing and is it same idea as rev matching or no??

 

bugz... it doesnt neccesarily matter as long as your rev is at the matchpoint when u are in gear and release clutch into it... so ur at 2500 rpm in 5th ... clutch in... downshift...blip gas...release clutch.... or clutch in....blip ....downshift...release clutch...doesnt matter as long as you go into gear and your revs are matched...how u do it ..is up to you

 

There seems to be one bit of info missing. Rev matching is just part of double clutching. To D.C. properly, you need to let out the clutch pedal (i.e. engage the clutch) while in neutral. This causes the synchros to match revs, too. I don't really get how that works mechanically, though, so if an expert can explain it, I'd appreaciate it. (I'd ask my brother, but he's an a-hole whenever he knows something I don't!)

 

thank u for helping out....^^

i will do some more practice be4 asking some newbie questions