Top Gear Z vs Z4

Hambone1 · 05-16-2011, 08:42 PM

Unknown, are you thinking of some of the stock FI engines that are on the market maybe?

UNKNOWN_370 · 05-16-2011, 08:46 PM

YouTube - GTM 370Z TWIN TURBO CUSTOMER TEST DRIVE

In this video, the first thing customer notices, his engine is smoother and a little quieter. Then he notices the adrenaline of his turbo. This is quite a normal effect for a v6.

Drive a 328 and a 335I. At WOT the 328 is louder.

Hambone1 · 05-16-2011, 08:48 PM

Quote:

Originally Posted by UNKNOWN_370

YouTube - GTM 370Z TWIN TURBO CUSTOMER TEST DRIVE

In this video, the first thing customer notices, his engine is smoother and a little quieter. Then he notices the adrenaline of his turbo. This is quite a normal effect for a v6.

No speakers at the moment, I'll take your word for it. I'm by no means an expert on turbos so I don't doubt you without listening to it

UNKNOWN_370 · 05-16-2011, 08:51 PM

Quote:

Originally Posted by Hambone1

No speakers at the moment, I'll take your word for it. I'm by no means an expert on turbos so I don't doubt you without listening to it

I'm no expert either but I have owned a couple of turbocharged cars. I've driven a few turbo and non turbo as well. I used to own a GN and I remember my 3.8 being smoother than the v8. I just had that turbo whistle.

Red__Zed · 05-16-2011, 08:49 PM

Quote:

Originally Posted by UNKNOWN_370

YouTube - GTM 370Z TWIN TURBO CUSTOMER TEST DRIVE

In this video, the first thing customer notices, his engine is smoother and a little quieter. Then he notices the adrenaline of his turbo. This is quite a normal effect for a v6.

Drive a 328 and a 335I. At WOT the 328 is louder.

Red__Zed · 05-16-2011, 08:50 PM

the smoothness he is referring to is the power delivery, by the way, and then the suspension at the end.

UNKNOWN_370 · 05-16-2011, 08:56 PM

Quote:

Originally Posted by Red__Zed

the smoothness he is referring to is the power delivery, by the way, and then the suspension at the end.

They didn't do any suspension work. That's the GTM garage and a stock Z with turbo. You can even here the engine is lower compared to other vids. The only turbo I've heard that's louder than stock is that one they remove the muffler to install.

Red__Zed · 05-16-2011, 09:04 PM

Quote:

Originally Posted by UNKNOWN_370

They didn't do any suspension work. That's the GTM garage and a stock Z with turbo. You can even here the engine is lower compared to other vids. The only turbo I've heard that's louder than stock is that one they remove the muffler to install.

3:12 is were he mentions suspension smoothness relative to his car.

Red__Zed · 05-16-2011, 08:54 PM

A turbo sitting on your exhaust pipe has literally nothing to do with engine smoothness. It may quiet down the exhaust note, and it will remove some high frequency components, but the harshness in the motor won't disappear with FI...

UNKNOWN_370 · 05-16-2011, 09:02 PM

Quote:

Originally Posted by Red__Zed

A turbo sitting on your exhaust pipe has literally nothing to do with engine smoothness. It may quiet down the exhaust note, and it will remove some high frequency components, but the harshness in the motor won't disappear with FI...

I didn't say disappear I said smooth it out a lot... anyway red zed. the turbo is placed at the exhaust but there is a lot of prep that goes into the engine to make that turbo operaiional and reliable. But ok red. U know everything.

Let me just correct one thing. I been saying turbos. I should be saying twin turbos. Single turbos have a different effect. That part is my bad.

Red__Zed · 05-16-2011, 09:06 PM

Quote:

Originally Posted by UNKNOWN_370

I didn't say disappear I said smooth it out a lot... anyway red zed. the turbo is placed at the exhaust but there is a lot of prep that goes into the engine to make that turbo operaiional and reliable. But ok red. U know everything.

Sometimes, if you build your engine. On that install, they changed nothing internally. Same with most installs. Most people can't afford to actually change the internals substantially on their engine for an FI build.

m4a1mustang · 05-16-2011, 09:04 PM

The harshness won't dissappear but it might abate some of it. I know when I added my CBE and Injens, the engine was not quite as harsh above 6k but it certainly wasn't smooth. There was a noticable improvement, though.

Red__Zed · 05-16-2011, 09:07 PM

Quote:

Originally Posted by m4a1mustang

The harshness won't dissappear but it might abate some of it. I know when I added my CBE and Injens, the engine was not quite as harsh above 6k but it certainly wasn't smooth. There was a noticable improvement, though.

yeah, you drowned it out

The roughness is due to really poor balancing on an engine that is stroked out way too far. Unless you changed something internally, it is still going to be there.

m4a1mustang · 05-16-2011, 09:09 PM

Quote:

Originally Posted by Red__Zed

yeah, you drowned it out

The roughness is due to really poor balancing on an engine that is stroked out way too far. Unless you changed something internally, it is still going to be there.

That's probably it. A lot of the audible harshness is gone with the exhaust and intake noise, but you can definitely feel it.

UNKNOWN_370 · 05-16-2011, 09:21 PM

Quote:

Originally Posted by m4a1mustang

That's probably it. A lot of the audible harshness is gone with the exhaust and intake noise, but you can definitely feel it.

I don't think the 3.7 has been stroked out way too far yet. There's a lot of Z's out there stroked out to 4.2l. Yes they need a cylinder sheath but they are doing it succesfully. I think this engine can safely go to 3.8 or 3.9.

Urethane motor mounts.

05-16-2011, 09:04 PM	#12 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6963	The harshness won't dissappear but it might abate some of it. I know when I added my CBE and Injens, the engine was not quite as harsh above 6k but it certainly wasn't smooth. There was a noticable improvement, though. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

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05-16-2011, 08:42 PM	#1 (permalink)
Hambone1 Enthusiast Member Join Date: Mar 2011 Location: Bellevue, WA Posts: 438 Drives: 370Z MB 7AT Sport Rep Power: 15	Unknown, are you thinking of some of the stock FI engines that are on the market maybe?

05-16-2011, 08:46 PM	#2 (permalink)
UNKNOWN_370 A True Z Fanatic Join Date: Jul 2009 Location: ny'r livn in tx Posts: 8,687 Drives: well over 130m.p.h. Rep Power: 14859	YouTube - GTM 370Z TWIN TURBO CUSTOMER TEST DRIVE In this video, the first thing customer notices, his engine is smoother and a little quieter. Then he notices the adrenaline of his turbo. This is quite a normal effect for a v6. Drive a 328 and a 335I. At WOT the 328 is louder.

05-16-2011, 08:50 PM	#6 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 121	the smoothness he is referring to is the power delivery, by the way, and then the suspension at the end.

05-16-2011, 08:54 PM	#9 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 121	A turbo sitting on your exhaust pipe has literally nothing to do with engine smoothness. It may quiet down the exhaust note, and it will remove some high frequency components, but the harshness in the motor won't disappear with FI...