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-   -   Thoughts on Engine Sound at High RPM's (kinda long) (http://www.the370z.com/engine-drivetrain/37266-thoughts-engine-sound-high-rpms-kinda-long.html)

jtsmith1 05-31-2011 07:45 PM

Quote:

Originally Posted by phelan (Post 1144224)
So you're a compressible fluids engineer? Do you use ANSYS for CFD analysis?

Hahaha, nope, still a mechanical (just as I was two post ago). I have not used ANSYS as of yet, but I do see it in my near future (just for my general understanding of the software). My job provides me with resources if I need any CFD done (i.e. a group of people who do nothing but CFD). I more or less use the results to make decisions regarding design. Keep in mind, I am not coming up with any brilliant, new concepts ( at least right now haha), I follow strict design procedure that has been proven with decades of experience and data.

I understand your point about losing engine response, as I think we all do, but some of use who are not tracking our cars may be willing to make a tradeoff, but first we would have to know what that tradeoff is. Minimal performance loss for decent decrease in vibrations, Ill take that all day, because I dont and wont ever track this car.

However, a heavier flywheel may be way out of the question, I dont know the answer, thats why I postulated the question and asked! Wanted to open it up to others who may have more experience and stimulate some outside of the box thinking. This may not even be an option, seeing as the flywheel seems to be fairly heavy to start with. However, if more weight (like less than 10%) could signigicantly decrease the vibrations and sound, I would be a buyer.

Red__Zed 05-31-2011 10:39 PM

The response you lose with a flywheel heavy enough to do more damping would cause more loss than just not revving that high...

Davey 06-01-2011 06:27 AM

VQ35DE, VQ35HR, F22C, EJ257.

Again, I don't think the engine is silky smooth, but I also don't see what the hoopla is. It's V6, it is about as good as a V6 is going to get.

crystalline 06-01-2011 10:44 AM

Quote:

Originally Posted by Red__Zed (Post 1144089)
I'd actually love to see something from all the people who don't think the engine is rough--what engines are you coming from?

Coming from an 02 maxima 6mt with the vq35, the new 3.7 feels better. Smoother and faster revving i guess I would say, but it sounds worse. The new engine doesn't sound as good as the 3.5 especially when bolt ons are added.

Nissan370 07-04-2014 02:27 PM

I know this post is old but when my z was stock it did feel like the motor hated being revved pass 5k
But then I added the supercharger and it sounded like a total different animal up top it sounded much more refined pass 5k
Now that I have the turbo on it that I hate revving pass 5k sound is back


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