I did some searching on these for the HR and couldnt find anything out. Is the top speed shortened down once the gears are installed or is it normal and just hitting top speed quicker? I know its 15% quicker acceleration, etc. Just couldnt find anything out on the top speed. Hope this doesnt sound confusing. Any help would be appreciated.

 

Top speed would essentially be shortened, unless you plan on revving further then before. Final drive affects the ratio of all the gears, so you'll find yourself shifting sooner in all gears than before.

 

u can go faster using ur stock gear.

 

you will be able to go the same speed. you car will top out at 160 even with 4.083 gears.

 

You will find an appropriate calculator here: http://www.wallaceracing.com/Calculators.htm

 

Top speed would be mechanically limited, but I think our top speed is electronically limited before the mechanical limits come into play, and would still be the case with the gears.

 

True! The factory limits the speed to 155 mph I believe. Now if you use UPREV this limiter is removed!

Zim

 

thanks for the help everyone. i run on the interstate alot and was wondering how much top speed i would lose.

 

Here's the sticky!

https://my350z.com/forum/engine-and-...installed.html

 

so, according to that chart in the link Lakeside posted, i would be able to hit 218 mph with the stock gears if my speed limiter was removed?

lol jk

 

No. 207 (gearing limit, not drag limit). Notice all the final drives list from gears 1 through 6. It's assumed it's a manual transmission, the numbers would be entirely different for a 5AT. Stock is 3.5, not 3.3, so the 3.3 numbers only apply if a 6MT installed the 5AT 3.3.

I know you were just joking, but just to clarify how to use the chart.

 

I think revs in 6th on stock gearing is just a little over 5000 at 158mph (hit the speed limiter). Wasn't really watching the tach that carefully, but 5th ends around 145 and 6th is a big drop in revs. So there's plenty of room to hit the stock limiter with more gearing, and it would get there quicker.

 

I never hit the limiter in my 07' Nismo but in my 06' base Z I hit the limiter in 5th gear. I just felt power drop off and didn't know what happened. It was pretty close to redline in 5th so I shifted into 6th gear and still had no pull....then I saw the digital speedo and knew lol.

I'd love to get a set of 4.08's in my Nismo...I just don't feel comfortable doing it myself yet.

-Scott

 

I just got my set of 4.08s and a Quaife LSD from Adam@Z1. Going to put this in my HR this Friday hopefully, got an appointment at Technosquare. Might get a tune too.

 

i will be running the exact same setup in a few more paychecks! lemme know how it goes.

 

Has anyone tried to locate these gears off the oem application at a junk jard? Any success?

 

Slightly OT but I picked up a 370Z 6MT pumpkin that I'm going to test fit. I'm pretty sure it works. They have 3.7 gears (ours are 3.5). So a slight bump for very cheap.

 

Aren't these the same gears out of the pathfinder? You should be able to get them dirt cheap at a junk yard.

-Scott

 

Yes, thats possible, but its not a complete axle your looking for or that they would sell you, so odds are it will be close to the same price...

you would then have to dissassemble the solid axle and remove the ring and pinion then trash/discard the rest of the solid axle.

-J

 

great....another idiot putting others in danger on the hwy......

Keep it on the track....

I find driving my car on the street boring and mundane after attending Drift and AutoX events...

-J