BANG when powershifting
 

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.

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

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.

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.

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...

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

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.

you.. Lol

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 :tup:

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

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 :ugh2:

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.

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.

And that's where I stopped reading. :bs:

:roflpuke2:

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.

Lol it's called saving time... I speak with other tuning shops on a regular basis and we save each other time and money by relaying our findings and experience... Simple as that. I will inevitably find the problem myself since you guys aren't sure what it is.

Rcz... You don't know ____

Ummm...actually he does know, he is one of the people taking their cars to the limit without being an ass about it.

The people being asses are you guys. Simply asked a question and the rest of you came in to act like their my father lol. Those of you who want to try and act like you know something I don't, stick around and we will have some fun.

and to clarify, you took what i said in the wrong context... what i meant that he knows ____ about is ME or what I do.

If you can't handle that I beat on my car then stay out of my thread. I will do as I please with it and I will share information with others who do also.

Ummm, you can do what you want with your car, you can make it a dirt offroad rally car for all we car. The thing is, when you come in like you did and shoot out random things on an online forum people are going to question it. Also, we are trying to help you, people here know what they are talking about, powershifting in this car is worthless and will just destroy the car without any benefit.

Wait...you are a sponsor now? WTF?

thats a relief! I was afraid I would get flamed for rallying my 370z :)

I hate to keep argueing, but it wasnt random at all. I asked a very specific question in effort to save myself the time. I also stated my belief in what the problem might be, however I havent had time to get in there yet.

I guess I didnt notice anyone trying to help while others were trying to "school" me. Its like this my friend... I powershift my cars. I dont intend to stop. While you may not, and others here may not, I promise you that there are plenty here that do or will. You say no benefit... well thats because the benefit must not apply to you. For what I do with my cars, there is a benefit... and I dont mind the risks I run. :cheers:

I would really like to hear the benefit you see/feel/achieve by powershifting in this car, please share.

And just a BTW... I powershift my 350z nearly every time I full throttle it, same trans going on about 6 years now. If you are so confident that my transmission is going to break very quickly... tell me, precisely which component(s) in the transmission are you concerned is going to fail?

in a nutshell... A->B faster, as previously mentioned.

example... the only car of mine i ever compared back to back powershifting versus standard shifting as quickly as i could... my previous daily driver 2008 civic si, i dropped some tenths powershiftting versus not. the increased acceleration was felt the most during the wheel slip when 2nd gear engaged. and yes, on high traction surfaces, small amounts of wheel slip actually accelerate the car faster and when the slipping ends there is an inertial boost of torque as the excess energy in the flywheel and crankshaft is captured, similiar to the "boost" you feel when an automatic car shifts well.

I'm new to the forum and have had my Z for about 6 months.
I have found the first-to-second shift to be somewhat "tempermental" especially when the engine is not completely warmed up and/or when power-shifting. I have driven sticks my entire life, including 911SC in 80s, so I consider myself competent. Like the Porsche, feel seems critical to a good shift from 1 to 2. I get an occasional gear-on-gear "click" and have also experienced the slight movement of the block but only when the engine is cold. Lubrication seems critical to every aspect of this engine running smoothly. Which brings me to my question -- has anyone used Castol instead of the ester oil and what is your opinion?

Oh boy, now it's an oil thread! There are LOTS of threads talking about switching from NEO to synthetic. Just use the search function my friend. It will save you loads of time and get you answers much more quickly and thoroughly.

This one is ages old and should take you through the whole evolution our forum has experienced with the Nissan Ester Oil. http://www.the370z.com/nissan-370z-g...ester-oil.html

I agree that shifting in the 370Z takes more feel than other cars. However, there is no 'feel' in powershifting.

Youre a clown.

Its not a "problem". What you're hearing is a direct result of the beating you're giving your car when you do it. Its not the tranny, its the soft stock differential mount bushings moving around when you shift hard. No one makes a replacement for it yet...

lol.

I didnt say it was the trans... i actually said i havent noticed the trans giving me any drama over it. i assumed it was a chassis setup issue such as the motor mounts or a dual mass flywheel issue.

i appreciate your suggestion and i will look into the trans mount. if thats all it is, i can build one next time i put the 370z on the lift. Ill post it up if no one else gets to it first.

Thanks for the info! Its all I wanted.

Make us some diff mount bushings and some tranny mount bushings as well as motor mounts and we can be friends

If you want to speed up the process and are anxious for a replacement, send me a stock trans mount and I will convert it to a delrin bushing or a solid mount or whatever you like, for no charge, as long as you report your findings.

With the current weather in Chicago, I have no means to do any track testing or even powershifting LOL.

:bowrofl:

Now we're getting somewhere!

Where in Chicago are you?

We are in the west burbs... west chicago to be exact.

Guys, most here haven't hears of phunk, But he developed a ton of performance parts for the 350z

umm, Would love to if I didnt have to drive the car. Maybe spearfish can help you out. I'll test em out for you if you make them.

Looking to see what you guys can do for the car, by the sounds of some past 350z owners.
Should make of a few threads (or one) with your work for the 370z and plans for the future. Might help in getting parts and such that people can send in, and maybe speed things up.

Geez you guys make me lol.
This guy's car isn't a DD... he obviously doesn't care if he breaks it, because if he does, he will make a product to fix the problem and potentially offer that product to the community. He develops parts, apparently, and isn't worried whether powershifting is "good" or not.
Ease up... keep it civil. No need to fight and argue. :)

That was so like...9 posts ago...;)

Agreed with last post.

now that there is progress being made. are those mounts/bushings the couse of our axle hop problems too? im new to rwd but on my sentra i had serious wheel hop problems and the cause was the engine mounts on the crossmember were too soft and it made the engine/tranny move too much on launch.

The prob is his first post was just askin the question regarding power shifting blah blah.

He didn't say his previous experience etc so course everyone gonna assume hes a retard just beatin on the car like that ginger kid video i posted before and let him know their thoughts bout it

Now new info is hes not some ginger but knows what hes doing so you can see the progression of the thread, most everyone will be huggin his balls now :nutswinger:

- Ty

I'm sorry. I just read this:
http://www.the370z.com/engine-drivet...-upgrades.html
before I saw this thread. He seemed pretty nice and knowledgeable when he wasn't getting the shite beat out of him.
'Tis all.