BANG when powershifting

phunk

anyone else experience a bang/thud from the engine bay when powershifting the 1-2 or 2-3?

sounds as if the engine were hitting the chassis somewhere, but i have looked around and found no evidence of that yet. im gonna take a better look at the engine mounts and see if they are possibly bottoming out.

just figured i would check in to see if anyone else had this or fixed this, and could save me time by telling me where its coming from.

car is almost brand new, 3000 miles... and otherwise perfect. only tried the powershifting a few times since it does that since the first time i tried it.

my 350z sure doesnt care even after years of powershifting daily (well, the days it actually gets driven)!

hmmm... possibly factory dual mass flywheel bottoming out its travel?... might have to go solid flywheel.

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m4a1mustang

This transmission doesn't like a true powershift. It's a good way to kill it.

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phunk

agreed! Im certainly not recommending that anyone else do it.

but i definitely have no plans to stop doing it in my car! so id like to find this thunk.

FYI I haven't noticed the transmission giving me much a complaint yet.

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spearfish25

Why do it? It's not making you get from A to B any faster. Nissan included a clutch for a reason. In about a month, you'll be posting another "crunching when shifting gears" thread. Sorry, I'm usually not one to piss on a parade, but powershifting is just nonsense behavior.

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m4a1mustang

Bottom line is it will destroy the transmission in short order if you keep it up. I come from a transmission that could powershift all day long (TR3650)... let's just say that the 6MT in the 370 can't even powershift at all. You will destroy the transmission...

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molamann

Powershifting should only be done a bike(wet-clutch) at the track imo.

phunk

Lol... Powershifting has nothing to do with the clutch... It means to keep full throttle while shifting... And trust me, you get from A to B shorter when you do it properly. You won't see me posting anything when my trans breaks.. I'll simply fix it or replace it.

You don't need to worry about what I do in my Z.

I have more than the means to replace the parts of my Z when they break... I have worked in the auto performance industry for over 10 years..

I know what breaks cars and what it takes to keep them going under extreme conditions. I was just hoping someone who is serious about achieving the highest performance rather then reliability might have already ran into this since I only picked up a 370 a few months ago. If not, I will handle it and post my findings for anyone else not afraid to break their car.

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phunk

you.. Lol

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B1nks

I'm actually glad someone is beating the **** out of the car and doesn't care. That way the limits will be found and maybe phunk will discover ways of making things better on the car. Keep up the abuse man

Also I think it is that dual mass flywheel causing the sound when the clutch gets re-engaged.

schrute

Abuse your car all you want - it's your car. Just don't expect to find many kindred spirits here.

When your Z is sufficiently abused what car will you move on to abuse next? Will your first posts on that forum begin the same way? GL

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spearfish25

Cool, you don't care about your car and you're happy to destroy it. You may certainly do as you please. However as Shrute astutely noted, you won't find much abuse troubleshooting on this forum.

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2013 Cadillac V-Wagon, RIP Z

Spec Jay

this elitist talk is pretty annoying. at least SOMEONE is testing the limits of this car. if powershifting is bad then 500whp from TT cars is just as bad has any of them blown up? i also agree about it being the flywheel banging when re engaging.

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370Zsteve

And that's where I stopped reading.

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m4a1mustang

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RCZ

This thread again??

I'm sorry, but its ridiculous that you ask "whats the loud noise when I powershift?" and then you claim you have any kind of mechanical inclination? Is that a joke? You know how transmissions work?

Someone who has built 1700hp vipers and has done maintenance on race cars doesnt ask why his car thunks when he pointlessly abuses it.

I know what it is, why its doing it and how to make it stop, but you can figure it out yourself with that attitude you have when people try to talk some sense into you.
You don't go faster by ramming gears, you are inevitably spinning tires in your 1-2 and 2-3 shifts and that is making you go slower.

Sorry bud, good luck in your quest to destroy the car.