Ok, i have the 3.5 gear and pinion and was told a while back i needed something else to install it in my auto rear. Can i not just swap gear and pinion into my 04 touring? It has a vlsd. What do i need to complete this swap?

 

Ok, I ofially hate everyone who has ever wrote abou the final drive. I want it so bad, and im trying to save for school and you all are going to make me blow my savings..... DAMNIT.

 

I notice in your mod list you have an ATI Procharger. Do you have that on the car now with the 3.9 gears? If so, are you experiencing any "traction issues" that so many warn about with the 3.9 FD? It doesn't sound like it, but I wanted to hear from someone with direct experience. Thanks.

 

That was my old car '04 (350Z). The gear swap was done on my '05 Infiniti G35 sedan (6MT).

 

There is no way this mod should be used on a FI car? What was the exact reasoning for this agian? THanks!

 

I think it could work with the right FI

specificaly a centrifical supercharger like the procharger or vortech where all the torque and power are up high - possibly a single turbo maybe too, as long as you're for sure under 400whp, preferably less than 380whp

I don't think it'd work at all well with a twin turbo setup or roots supercharger because they have too much initial torque early in the rpm range

To make it work though at all, you'll need maximum grip - so wide tires 295, good sticky tires, no toyos or nittos, go with michellin PS2 or BFG KD or bridgestone S03's ro RE50's etc.

You'll need an LSD

if there still isn't good traction, then maybe some more weight in the back in the form of a rollbar or subwoofer

 

I am installing a Stage 1 Stillen with my 3.9.. didnt want to go over 340whp and this set me in a happy median.

 

Generally higher FD gear ratios make for better acceleration but sacrifices top speed. It is the reason I think Nissan actually put a 3.54 rear end in our cars to begin with instead of a higher ratio 3.9, 4.10, 4.11 etc. because the Z is not designed to be a drag car.

So my question is...how much does top speed suffer from doing this, possibly negligible?

 

i think you lose like 10mph, but can gain it back if you get an ECU flash

why does anyone really need to go 150+mph?

 

same reason that someone needs to drive an autocross car a quarter of a mile in a straight line in under 12 seconds....

just because you can

 

people can also jump off cliffs .....because they can....


anyway, if your goal is to always go above 150mph, then these gears are NOT the mod for you.

 

Our second batch of 3.9 ring and pinions has now arrived. Back orders are shipping out this week. Glad you enjoy it!
Now wait unitl you try the new manifold!

 

i heard that you are basically exchanging top speed for faster acceleration.. is this true???

 

I would be interested in one, now that we're friends how about a discount

 

how is it on the highway? noisy? are the RPMS screaming?

 

It only increases your crusiing RPM by 250 on the highway.
Yes it increases you acceleration..........Find someone who has one..and take a ride...you will love it...its what the track model should have come with in the first place!

 

how much top speed do you loose??

 

I have the 5AT and all I want is the 3.5 Final Gear...could I go right to the 3.9?

 

10% in theory, but I think it's less in reality

If you get your ECU flashed to raise your rev limiter, you'll gain it all back anyway

you gotta ask yourself how often do you drive 160mph? There's only so many high speed ovals around the country. You'll otherwise rarely reach that speed on a road course, you'll never reach it in a drag race or auto x. So that leaves public roads going 160mph...

 

not true at all....You will not lose any top end...you will get to the 155mph limiter faster....

If your car has the limiter removed...and you have enough power....your top end is reduced from 181mph...to 167mph...