well,..the G35 has a slightly shorter Final Drive(G35---3.538:1 Z-3.446:1) for all you track buff's out there(or just wanting a quicker off the line Z),...anyone thought of using a g35 final drive?

Big around the Honda and ITR camp for using the JDM final drive in their US "R's"

thats for people that are say installing Flywheels etc,..might as well go for a new Final drive,..but might be costly?? who knows?

interesting peice I read on the G35--thats what helps its -7hp kinda hang w/ the Z and its 100+lb weight difference.

Any thoughts?

 

very interesting, i used to own an integra unitl it got stolen last week here in TX. i used to go to those kinds of forums and a ton of people were swapping out thier final drives. now i am getting a Z. i guess they did me a favor!!

www.chirohealthtalk.com

 

<------ newb

what does final drive mean?

 

Well,.in easy terms----the shorter Final drive(gearing) would mean you cannot achive higer top speeds or as high of top speeds(they would drop a litte lower) but would speed up faster through the lower gears to compensate!!

more for say a track car that needs the power earlier in the powerband and lower in the gears then a NASCAR type car that needs the power to pull up top to say catch up(in a 4th-6th gear setting)<---hmm,..make sence?

Very easy trick kind'a when it comes to a HONDA,.they are sooooo much eaiser to work on then Z's!

Edit: its not replacing all the gears,..just the Final Drive ratio--could very well drop a sec or more??? on say 0-60 and maybe yeild a faster 1/4 time>>????

 

Collin, The Z 6MT has the final drive of 3.538:1 not the G. I know because I had Z1 Motorsports replace my 5AT rearend w/the rearend from the 6MT. I cut nearly 4/10's off my previous 1/4 time w/the changeout. I did this in April and have had no problems at all. Now, you cannot just change out the ring and pinion because there is a length difference. I changed the whole differential. It ran me $400 for the unit from a 1,300 mile wrecked 350. New it is nearly $1500.
A very nice return on my $400! Regards, Jim

 

Jim,..so you basically replaced Whole tranny's from a 5at to a 6 w/ standard Z Gearing and Final,..or you did put the G35 Final Drive in??

maybe the numbers are backwards(where I'm reading) but says the G has a shorther Final,..hence quicker gearing?/ Correct?faster in the beginning(for the Lay-person).w/ the Lighter weight of the Z compared to the G(aproz-100-200lbs)should mean quicker times I think???

I would think that would just Replace the Stock Z one(same make same motor just Different ECU,.etc),..kinda like say for instence:

2000 Integra R: w/ Standard(US) Final drive,..swapped w/ JDM ITR final yeilds almost 1 sec or more off 1/4 times!(from stock US ITR)gearing alone

I would think the Z would be about the same,..no ECU to interupt anything?? I guess we would have to lucj out liek you to find a Wrecked G and do it?? but souns liek it would be worth a try if you find one?

 

Collin, No, I only replaced the rearend (final) on my Touring automatic (3.34's)with the rearend from the manual shift (3.54's) Z. I still retain the auto 5 speed tranny in my Z.
Yes, it is a very good return on my dollar as far as mods go. Lots of guys are spending double my $400 for exhaust upgrades and no real bettering of 1/4 times at all. I have the GHL Motorsports exhaust on ($900+) and it made negligible differences by itself, but the gears came on immediately with documented better results. Regards, Jim

 

OH,..OK I SEE!!

Nice quick upgrade I agree!!!!
so you still got AT,..got it!! was wondering what was up w/ that? Thanx for the INfo!

Guess it will really yeild better Speeds and 1/4 times as well then!

Someone needs to Hook-a-brotha up w/ a damn G35 Final then,.hahaha guess I better start huntin for a wrecked G35sport.

thanx JIM!!!

 

Fairlady,

I had the US/JDM ITR final drive swap. It was a pain in the *** for the R, simply because it didn't have a 6th gear and it was running in VTEC all the time at highway speeds. And that car is very loud. But the difference in final drives is also alot larger here.

Furthermore, the Z roadster also has a shorter final drive than the Z to compensate for the weight difference. That might also be a viable option (and a cheaper one) when it becomes available.

When doing that some people also change other gears to make the car more managable. Some Integra guys use the JDM ITR final drive coupled with some USDM GSR gears. I don't think that would be necessary here because we have a 6th gear and the disparity between final drives in the G35 and Z is not too large apparently.

I think it would yield some gains though, but the car would lose some top speed, etc. etc. etc.

dan

 

Shorter gears only yeild lower top speed IF you top speed is limited by redline..... I am gonna go out on a limb and say that the 350 is DRAG limited on top speed, so the gears will actually multiply torque BETTER and will either not affect top end or improve it!

Ben

 

i value acceleration 10 times higher than i do top speed, but thats just me. I doubt I'll ever max out the Z anyway.

 

Are you sure that the Z has a final drive 3.446? I was under the impression that the Z had a 3.538:1 FD and a 6th gear of 3.446 (0.79:1).

Here's a stat table:

http://www.nissanperformancemag.com/...2/zspecstable/

Also, I believe the G35c has the same final drive and gears as the Z.

http://tuneman1.tripod.com/infiniti-g35c.txt


I've played around with CarTest (simulation software) and mucking around with the final drive really has no effect on qtr mile times. You can improve 0-60 mph times up to the point that you have to shift into 3rd before hitting 60.

The Z (and most all sports cars) have slightly wonky gear sets in order to hit 60 near the end of 2nd gear. This is for the 0-60 times posted in the mags.

Playing with the final drive (and not changing the other gears) will likely just amplify the negatives of the 0-60 influenced gear ratios.

--
Jeff

 

final drive meanin 6th gear?

 

Usually final drive means the gear ratio of the differential.
--
Jeff

 

gotcha; thanks. sounds cool. kinda like the domestic guys, too.

 

Well,.thanx Guys for all the input!

I have to agree w/ KamikaZ though,..I value faster accel more so then Top speed,..the fastest I've gotten the Z so far(with the room I've had) was 132mph,...but just don't like the sound of gettin a ticket just ********tin to see how fast it would go,..I'd rather earn a ticket--like a Super Speed run w/ a Faster car(hahahahah) to see if I can hang,...but I'd still have to think that the shorter Final would yeild something???

Maybe the Roadster is just enough coupled w/ the Stock Z gears---to drop close to a 10th but hmm,.would it be worth it!!??
I'm wondering this because I would like to find a junked Z and get the LSD off it(as well as Final Drive) or whole tranny for that matter,...but would probably end up cheaper to buy a brand new LSD anyway!

So well,...like i said,..just a thought

thanx again guys!

*350ZDANNY*
AS far as the ITR Final goes,..your right--it does leave ya a bit loud @ Highway crusing speeds(and in VTEC would kill gas mileage),..but then again,.The Z dosen't have a Vtec switchover like the R so thats kind of a plus and the 6th would help that a tad
--Friend had JDM ITR motor in his GSR w/ LS Gears but damnit once he had all his JDM motor/ECU,. seats/backseats everything put in a mth later he sold the damn car,...and I gave him my old JDM Front end conversion!!!! I was pissed he did that!
But,..n e way--Thanx Guys!

 

Fairlady -

yea you're definitely right. Plus the Z sounds much nicer than the ITR when it's revved.

I also value acceleration over top speed, at least while im living in the US. I think the best thing to do is to get a 2004 roadster tranny once a few get smashed up... OR if your tranny fails like some other '03's have, ask the dealer to order an '04 roadster tranny. That may be what I do.

Anyhow, good luck to you if you try it.

-
danny

 

hmm,. have to look into this, as its a few years away, but a differential swap may be in order before the G35c is turned in at lease end

 

You know why theya r e stealing them dont you. They steal the engine and leave the body somewhere. I probably see 1 a week at the city auction. Heaven knows how many a week there is at the insurance auctions. The cops were saying that its getting to be a big problem. Kids stealing Integras for the purpose of stepping up the civics.

 

yep,..well they say the Camry or Accord is the most stolen,..but I swear the INTEGRA TYPE-R is an Endangered Species and gettin stolen ALL the time!!!!! Visit Honda-tech.com they are always posting they are stolen!!!

DAMN I HATE THEIVES

My friend in Texas is very woried,...but he lives we're knowone knoes what his car is,..hahahahahah