Probably a dumb/noob question..
 

What's up everyone...

This is probably a very dumb/noob question but I can't seem to find any information on this..

I understand that the SynchroRev Match system will match the RPM's automatically on a MT when you downshift.. I'm cool with this function..

Now unrelated to SynchroRev, I know of some cars where the MT system does not require to take the foot out of the accelerator when you step on the clutch for shifting gears... So that means you can be accelerating in 1st gear, for example, step on the clutch and engage 2nd gear without ever taking your foot out of the accelerator...

Is this possible in the 370Z or is it the traditional clutch/accelerator balance game..??

Thanks for clearing this out..

All Mt's require you to use the clutch, or at least require you to release the throttle. You are referring to manual shifting auto's.

Oh, and by the way, do not try that with you Z please.

Ah there's a built in rev limiter anyhow ;)

NXTAZEE I've noticed you are spending an awful lot of time on the forums - isn't that against what your therapist recommended?

sure you can keep your foot on the gas while you clutch in and shift, just watch the pretty bar shoot up and bounce :excited:

I drive with S-Mode off because I am always putting my car into neutral while cruising. The auto revs get annoying. It's only useful when you have to downshift a lot. I once went past a cop giving a ticket. I put it in neutral because i wanted to be inconspicuous and the car reved like crazy and the cop looked up at me. I never want that to happen again.

Thats funny, but the exhaust isnt that loud anyway.

You're still revving at a cop... no matter how loud it is, you can still hear it.

That's true. It could get loud when you rev on the streets with no other cars around. It wasn't just one rev. It was multiple revs because I was moving the stick shift left and right (like gear checking; bad habit).

That's actually a good habit, just not when you pop out of neutral from 4th or 3rd with SRM. The thing just senses when you might go down, so I've actually just trained myself to move it to the right instead of the left.

OK... First off, this method of keeping the throttle more than 0% is called "No-Lift Shifting" AKA "Power Shifting".

This is easily done on cable-driven throttle bodies and on some newer cars with electronic "Fly-By-Wire" throttle bodies. I believe all cars since 2005 are fly-by-wire. For example, on my 2007 Solstice, you cannot power shift. The throttle body automatically closes if you try to power shift. But newer models now allow this.

With the syncrorev matching system on with the 370z, I wouldn't attempt this. With it off, I'm sure it's possible.

yea I do that a lot too, so I never have the S mode on. Also when I do have it on I still rev match since I'm not used to not doing it.

Sounds like bad shifting in general, like flatfoot shifting (same thing?)... but it is possible, although without a strong clutch or tranny (or both), something might break. If not those two, possibly a torque sensing diff or a bad driveshaft, even the connections, could break. But that also means in a car with high torque curves (linear like our Zs), you can basically chirp the tires constantly up to 2nd or 3rd gear. Pretty insane.

maybe you should try perfect shifting? :P Its actually pretty easy.. you shift without pushing the clutch in. No grinding, no problems (if you do it right that is)

That's dangerous if you're not perfect... a friend of a friend can do it in his Supra. It's risky, for sure.

hahaha i can do it in my old car :) it was taught back in the day, in case your clutch lines failed.

That would definitely come in handy. Although, clutch line failing is just negligence in road use. Maybe if you were racing...

yes this is a forgotten skill within modern day manual drivers. Although failing clutch lines are highly unlikely, it is always good to know .. just in case :P

You can always hoof it and push the car.... hahahhaha
A good workout for da thighs, hahaha

yea, up until you hit a 1% grade or more. hahaa

Oh man... I just tried to push the Z up a small grade, my driveway. Just for fun. Took 3 guys to get it rolling, and to keep it rolling, two guys. I'd never want to die of a bad clutch line. Maybe I'll learn this perfect shifting so I can show off if I want. ::D:

hahahahah practice it in another car first please :D

Definitely a good idea. ... yeah, definitely. LOL

Perfect shifting is pointless, IMO.

There's a clutch for a reason. And the clutch gives you more control.

I power shift when I'm racing. I haven't broken anything yet. But who knows? I may break something at some point. I'm pretty hard on the trans and diff. Power shifting or not, I'm pretty brutal on the shifter. I pretty much shift like the car is disposable. :D

What's up with the face painting? Is it part of the "Perfect Shifting"?

hahahaha no idea. its the only legit video anyone has done..

this topic came up a while back in a different forum... everyone was trying it after that hahaha

Yes, and I will give you a free polish if you keep it on the QT ;).

hahaha i remember learning perfect shifting on my ITR

It's actually an advertised feature of the turbocharged Cobalts and HHRs. It keeps the turbo spooled up between shifts. I think it basically amounts to a secondary rev limiter.

Just granny shift it...

So, in short words.....

It may be possible, not advisable, do it at your own risk, and the best way is to engage the clutch, off the throttle, shift gear, and resume acceleration.. A.K.A. the good old way... :driving:

There is an aftermarket piggy-back kit that can allow for this (drive by wire only). You can program the delay for your normal shift time. When the clutch is engaged, the piggy-back reduces the throttle and then goes back to WOT after the programmed delayed. It is more beneficial for a turbo car because you can have the system keep the boost on....or at least help keep the turbo spooled. For an NA car, it just seems like being lazy.

EDIT----The piggy-back pulls ignition, not throttle. Oppss.... Here is the link....
http://www.npcompleteperformance.com/wotbox

Interesting. I may look into getting something like that for my Solstice. I tried my hardest to no-lift with the Solstice because that turbo winds down fast. This could help. Although, for $300, GM has an add-on kit that removes that limitation from the computer and allows the waste gate to hold more boost (stock will only allow 22PSI). Not really worth the money, but it's warrantied.

Used to this on my bike on the track, though it's quite necessary on the street.

Its my understanding that this isn't great to do with cars. Something to do with synchro mesh or what have you. I know it's the preferred method for large commercial trucks but they have a different set up compared to cars. One has synchro mesh and one doesn't, can't remember which is what, etc.

On the flip side I do this on my bike from time to time but it's much safer for a sport bike. All our gears are actively engaged just not all of them under load. It's as simple as just clicking in to gear. Lots of guys use this method at the race track because it saves time off their laps if you are good at it.