6MT with 3.53s?

Nixlimited · 02-26-2013, 03:36 PM

Quote:

Originally Posted by Mr.Squeeze

I will say this much I have had it on my car since July of last year and my down shifts still seems smooth when down shifting. I use rev match all the time it may use the computer to compute speeds .

I will also say and its s fact my car is much faster with the 3.3 than the 3.7 its perfect for my power level . With the shorter gears was shifting way to much and traction is much improved in my opinion any Z over 550 whp .

That's good to hear. I totally agree regarding the better match of long gears with FI, particularly turbos. On my last turbo car, the short gearing was my #1 complaint. We should try to make a spreadsheet just to see what the effect is. My guess is that it is not that significant if you aren't having serious issues.

Where did you source your final drive gears?

Mr.Squeeze · 02-26-2013, 03:56 PM

Quote:

Originally Posted by Nixlimited

That's good to hear. I totally agree regarding the better match of long gears with FI, particularly turbos. On my last turbo car, the short gearing was my #1 complaint. We should try to make a spreadsheet just to see what the effect is. My guess is that it is not that significant if you aren't having serious issues.

Where did you source your final drive gears?

I still think even with the 3.3 the lower gears are still to short 1-2, I however do love 3-4 gear now.

I got the whole differential from a local junk yard for $200. I plan on getting another one from them just rebuild and put a good LSD in it.

If you cant find any at a local junk yard look on Ebay.

phunk · 02-26-2013, 03:57 PM

Can anyone with 500+ rwhp comment on traction improvements by only changing from the factory LSD to an aftermarket LSD? As far as just pure straight line traction, I wonder how much can be unlocked in the diff. The way my tail wags around, I dont think I am getting any one-wheel action in a straight line, but it will often go one-wheel on me if I am trying to do donuts.

Nixlimited · 02-26-2013, 04:21 PM

Here is a comparison chart between stock 3.692 and 3.3 ... if my math is correct.

Nixlimited · 02-26-2013, 04:23 PM

Quote:

Originally Posted by Mr.Squeeze

I got the whole differential from a local junk yard for $200. I plan on getting another one from them just rebuild and put a good LSD in it.

What car was the diff off of? A 370Z? Just curious where the new gears come from. Sorry if I missed this above.

esfourteen · 02-26-2013, 04:27 PM

I run the 3.53 with a Quaife ATB LSD, cruise and SRM work perfect (about 100rpm off). I'd agree that over 500whp the 3.3 FD is probably best, but the SRM will be ~300-400rpm off (same as going to 4.08) and as Squeeze mentioned, cruise won't work.

Nixlimited · 02-26-2013, 04:33 PM

Quote:

Originally Posted by esfourteen

I run the 3.53 with a Quaife ATB LSD, cruise and SRM work perfect (about 100rpm off). I'd agree that over 500whp the 3.3 FD is probably best, but the SRM will be ~300-400rpm off (same as going to 4.08) and as Squeeze mentioned, cruise won't work.

Why does cruise not work? Is it because of the speed/rpm mismatch? I would think the computer would just hold a speed.

Esforteen - where did you get your setup and would you recommend it?

Zat_Zuma · 02-26-2013, 04:38 PM

From my experience and going from a 3.7, 4.08 and 3.9 ratios(why you ask? ..long story) that if your concerned about the few extra RPM needed for a downshift....... blip the throttle after Rev match has done it's thing.

Phunk: the stock LSD is a piece of crap. I use a Cusco RS 1.5 80% and when it locks it locks well. But it is noisy on low speed turns and likes to clunk at low speeds.
Beware though, as it will snap rear axles with drag radials.

TerribleONE · 02-26-2013, 05:23 PM

I want to do this but I cant see my OSG lsd fitting in the new pumpkin..

esfourteen · 02-26-2013, 07:33 PM

Quote:

Originally Posted by Nixlimited

Why does cruise not work? Is it because of the speed/rpm mismatch? I would think the computer would just hold a speed.

Esforteen - where did you get your setup and would you recommend it?

I put it together myself: used 350z open diff, quaife ATB LSD for an open diff, new bearings, seals, and shims from nissan. It took about 4 hours to put it together and properly shim the diff, if you're mechanically inclined It's a fun project. I love this setup, but going for 600whp I could probably use more gear lol.

As for the cruise control with the 3.3, I believe the issue is related to the RPM's being off since Squeeze mentioned cruise works in 5th gear for him.

Mr.Squeeze · 02-27-2013, 02:18 AM

Quote:

Originally Posted by Nixlimited

What car was the diff off of? A 370Z? Just curious where the new gears come from. Sorry if I missed this above.

My rear diff came from a 06 G35 automatic, you can use a G35/350 doesn't matter as long as its from a auto. The automatic cars are the only ones that come with a 3.3 final drive. This is a direct swap you take out your diff and swap in the other one.

Quote:

Originally Posted by Nixlimited

Why does cruise not work? Is it because of the speed/rpm mismatch? I would think the computer would just hold a speed.

I think it has to do with the speed being off for cruise to work in 6 gear.

Quote:

Originally Posted by TerribleONE

I want to do this but I cant see my OSG lsd fitting in the new pumpkin..

If you have a OSG LSD already and it's for a manual car it wont work in the automatic diff. The pumpkin housing are the same it's the internals that are different ring and pinion.

Mr.Squeeze · 02-27-2013, 07:46 AM

If anyone wants a rear diff I spoke to my friend that works at the junk yard where I got my from and you could order one and have it shipped.

PM me for details in your interested .

TerribleONE · 02-27-2013, 04:24 PM

Quote:

Originally Posted by Mr.Squeeze

If anyone wants a rear diff I spoke to my friend that works at the junk yard where I got my from and you could order one and have it shipped.

PM me for details in your interested .

I wanna take you up on this so bad. But have no desire to try and sell this LSD and find another one..

Nixlimited · 02-27-2013, 08:11 PM

Quote:

Originally Posted by TerribleONE

I wanna take you up on this so bad. But have no desire to try and sell this LSD and find another one..

Yeah. I think 3.3 is going to be too low for me. I do use cruise in 6th. I'm lazy on road trips!

Mr.Squeeze · 02-28-2013, 01:08 AM

Quote:

Originally Posted by TerribleONE

I wanna take you up on this so bad. But have no desire to try and sell this LSD and find another one..

You can always keep your LSD and get 3.53 diff it will fit that.

Quote:

Originally Posted by Nixlimited

Yeah. I think 3.3 is going to be too low for me. I do use cruise in 6th. I'm lazy on road trips!

I can see this being a problem ,but I wouldn't really switch to the 3.3 on stock block unless I was pushing at least 525whp. I think anything lower than that its a waste my low boost spring pressure is 600whp I need it .

02-26-2013, 03:57 PM	#33 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,669 Drives: 370 Rep Power: 974724	Can anyone with 500+ rwhp comment on traction improvements by only changing from the factory LSD to an aftermarket LSD? As far as just pure straight line traction, I wonder how much can be unlocked in the diff. The way my tail wags around, I dont think I am getting any one-wheel action in a straight line, but it will often go one-wheel on me if I am trying to do donuts. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

02-26-2013, 04:21 PM	#34 (permalink)
Nixlimited A True Z Fanatic Join Date: Aug 2009 Location: San Diego Posts: 1,235 Drives: 15 GT-R / 11 Prius Rep Power: 26	Here is a comparison chart between stock 3.692 and 3.3 ... if my math is correct. phunk likes this. __________________ Car Sold! Pleasure being a part of the Z community. New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91) Last edited by Nixlimited; 02-26-2013 at 05:04 PM.

02-26-2013, 04:27 PM	#36 (permalink)
esfourteen A True Z Fanatic Join Date: Mar 2010 Location: LI, NY Posts: 1,375 Drives: 40th TT Rep Power: 19	I run the 3.53 with a Quaife ATB LSD, cruise and SRM work perfect (about 100rpm off). I'd agree that over 500whp the 3.3 FD is probably best, but the SRM will be ~300-400rpm off (same as going to 4.08) and as Squeeze mentioned, cruise won't work. __________________ Build Thread \| GTM TT Install Thread \| Engine Build Thread

02-26-2013, 04:38 PM	#38 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 19	From my experience and going from a 3.7, 4.08 and 3.9 ratios(why you ask? ..long story) that if your concerned about the few extra RPM needed for a downshift....... blip the throttle after Rev match has done it's thing. Phunk: the stock LSD is a piece of crap. I use a Cusco RS 1.5 80% and when it locks it locks well. But it is noisy on low speed turns and likes to clunk at low speeds. Beware though, as it will snap rear axles with drag radials. TerribleONE and phunk like this. __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD Last edited by Zat_Zuma; 02-28-2013 at 08:03 AM.

02-26-2013, 05:23 PM	#39 (permalink)
TerribleONE A True Z Fanatic Join Date: Jan 2009 Location: Socal Posts: 10,203 Drives: WOT Rep Power: 5851	I want to do this but I cant see my OSG lsd fitting in the new pumpkin.. __________________ 638WHP 541WTQ @ 13.5PSI Build thread

02-27-2013, 07:46 AM	#42 (permalink)
Mr.Squeeze A True Z Fanatic Join Date: Aug 2010 Location: Keystone state Posts: 1,209 Drives: 2010 370z Rep Power: 20153	If anyone wants a rear diff I spoke to my friend that works at the junk yard where I got my from and you could order one and have it shipped. PM me for details in your interested . __________________ Driven Motorsports Single Turbo 7675 T4 1.32 A/R 995WHP 780TQ