I hope I am in the right place... . Can someone explain what rev-up is, and it's impact on performance. Two guy's at my work have Z's (04 and 06) and I am curious.

 

Engine has been "tweaked" on an '06 allowing it to rev 400RPMs higher, thus the 7000RPM redline. The non revup has a 6600RPM rev limit. (The '06 auto is a non revup). The result of this tweak is increase in HP - 300, opposed to 287 on the non revups. The increase in HP sacrificed some TQ loss though.
Search on the forum and you'll come up with lots more info.

 

^Yea, that's right, and also independent reviews and tests have shown that rev-ups tend to respond better to na mods such as exhaust, test pipes, plenum mods than the non-revups...maybe something to consider if you're going to buy one. I'm happy with my rev up

 

Rev-up engines (introduced in the Track and 35th anniversay versions for 2005 Z) also have less torque: 260 ft/lbs.

 

Thanks for the reply's....One more for now... Is it only the '06 models that have it?

 

Certain '05s and all '06 manuals have revup (what the guy above you posted).

 

http://www.freshalloy.com/site/cars/...ne/default.asp

 

It's also worth mentioning that no AT Z's have the rev-up.

 

Revup:

higher peak horsepower due to higher redline (7000), different lower plenum design, and variable exhaust cam timing.

Non-revup:

lower peak horsepower but more torque across the powerband, does not have variable exhaust cam.

 

Nonrevup:
http://www.zippyvideos.com/688114462...0015/*matt1180

Revup:
http://videos.streetfire.net/search/...12004ac010.htm



-frank

 

Not entirely true. Rev-ups have less peak torque than the non-rev-up motors, but the Rev-Ups have a broader torque curve...

 

That was some nice driving in that second vid...looks like the track @Steele,Al. Thanks for the detailed info on rev-up... later

 

Not from what I've seen ...if that's true then how does MREV2 and 5/16" spacer produce so much midrange torque on the revups?

Meh I'm too lazy to search for any dynos, if you have some that illustrate what you're talking about then I'll gladly take back what I said.

 

I agree. Flat and wide curve is better than peaks for short durations.

 

Moderator, please remove this thread if u need to as I don't intend to put this subject here.

Sorry guys but after reading through this thread I'm still not too sure about the difference in the two. I have been driving MT for 10 yrs and never knew the difference? With the Z, on a quiet back-street that's normally where I play with my car when no car's around, usually I switch gears at about 5.5K during 1st & 2nd and I felt pretty fast. I understand you need to hit close to the redline to experience the most HP, but I'm just curios to know what am I doing? am I powering or speed-shifting?

https://my350z.com/forum/2003-2009-nissan-350z/182531-question-about-when-to-shift-when-approaching-redline.html

 

Its in the math:

287hp * 5252 / 6200 = 243 ft-lbs
300hp * 5252 / 6400 = 246 ft-lbs

6200 and 6400 are respectively where the engines make their peak amount of HP. As you can see, it has more torque (albeit 3 ft-lbs) 200 RPMS later in the powerband.

The reason the MREV-2 and 5/16" spacer works so well is it improves the low-end torque that was missing from the revisions Nissan did. Thats why overall, the Rev-Up motor makes less torque. It does have a somewhat broader powerband though.