Nismo Differential upgrade

Rusty · 11-13-2020, 07:27 PM

Quote:

Originally Posted by NissanZ34

Is it possible to get the GT LSD Pro from the dealership?

How did you mod it?

Weld it up and reshape it.

NissanZ34 · 11-14-2020, 12:05 PM

Is the Bell diff brace negligible if I put urethane diff bushings and urethane transmission mount along with urethane motor mounts? I don't want to buy parts that will not fit my car. I'm just looking to reduce power loss since I've already done my exhaust and clutch system.

Now for my engine, I was leaning toward the Z1 2.5" intake because they say it can be run without a tune and can be tuned later for better results. Right now I have the silicone tubes and K&N drop-ins. Anybody been there that can chime in?

Rusty · 11-14-2020, 10:07 PM

Quote:

Originally Posted by NissanZ34

Is the Bell diff brace negligible if I put urethane diff bushings and urethane transmission mount along with urethane motor mounts? I don't want to buy parts that will not fit my car. I'm just looking to reduce power loss since I've already done my exhaust and clutch system.

Now for my engine, I was leaning toward the Z1 2.5" intake because they say it can be run without a tune and can be tuned later for better results. Right now I have the silicone tubes and K&N drop-ins. Anybody been there that can chime in?

IMO the brace works best with solid diff bushings. The brace is solid, so why not the bushings.

General thinking on the forum is if you get both intake and exhaust mods. You need a tune. One or the either, no tune is needed.

NissanZ34 · 11-16-2020, 01:20 AM

Quote:

Originally Posted by Rusty

IMO the brace works best with solid diff bushings. The brace is solid, so why not the bushings.

General thinking on the forum is if you get both intake and exhaust mods. You need a tune. One or the either, no tune is needed.

While I perfectly understand your point of view, mine is more oriented towards win/win upgrades. I read that solid mounts and bushings increase cabin vibrations while the urethane is a bit less intense. This is not a track car but more a street toy/race car. I want to keep it driver friendly as much as possible and not ruin the touring experience.

My question about the diff brace necessity remains. I appreciate my platform and would like to enhance the experience without sacrificing too much on the comfort aspect.

For example, I got the RJM Clutch Pedal assembly and it improved the drivability and performance. So I would prefer not get a modification that will decrease drivability.

NissanZ34 · 11-16-2020, 02:35 AM

I managed to find an installation video on Youtube that shows the Z1 finned cover does not fit the GReddy GT Evolution exhaust. They had to cut the fins on the sides near the exhaust.

I would guess the Bell brace won't fit either but on another installation video I've seen how they cut it. It's ugly but it seems to work anyway.

All that being said, I am convinced for the Bell brace but I would like to have your opinion on the Z1 cover if it's worth the money and the trouble to cut some of the fins.

Rusty · 11-16-2020, 09:02 AM

I had to cut the fins on mine for clearance with the FI exhaust. The Z1 cover increases the amount of lube by about 1/2 liter. I also have a diff cooler and a temp gauge installed. I've seen temps as high as 270F before turning on the pump and fan. With the cooler, there is 3 liters of lube in my set up.

I have all of the SPL catalog on my Z. Solid diff bushings, sub frame bushings, etc. The diff bushings really didn't make that much difference in noise.

Spooler · 11-16-2020, 09:08 AM

I run the Z1 diff cover, OS Giken 1.5 way, Z1 poly diff mounts, and a modified Bellworks diff brace. My Subframe is solid mounted with Nismo/SPL subframe bushings. It's not bad or hard to deal with. No whining in the cabin. I hate that. That is why I have the poly mounts. I also run a diff cooler and that is a must have with a clutch diff. It is loud at a stop, driving you don't notice it so much. The Z1 cover you trim the bottom fins to clear.

NissanZ34 · 11-16-2020, 01:19 PM

Quote:

Originally Posted by Spooler

I run the Z1 diff cover, OS Giken 1.5 way, Z1 poly diff mounts, and a modified Bellworks diff brace. My Subframe is solid mounted with Nismo/SPL subframe bushings. It's not bad or hard to deal with. No whining in the cabin. I hate that. That is why I have the poly mounts. I also run a diff cooler and that is a must have with a clutch diff. It is loud at a stop, driving you don't notice it so much. The Z1 cover you trim the bottom fins to clear.

I have searched for the Nismo and the SPL subframe bushings. It appears that the Nismo kit includes shims for adjustment. The price is significantly higher than Z1 or SPL but since it can be ordered at the dealership I could then avoid paying for the shipping.

Do you have the solid or polyurethane transmission mounts and what are your motor mounts? What diff cooler would you recommend?

NissanZ34 · 11-16-2020, 01:25 PM

Quote:

Originally Posted by Rusty

I had to cut the fins on mine for clearance with the FI exhaust. The Z1 cover increases the amount of lube by about 1/2 liter. I also have a diff cooler and a temp gauge installed. I've seen temps as high as 270F before turning on the pump and fan. With the cooler, there is 3 liters of lube in my set up.

I have all of the SPL catalog on my Z. Solid diff bushings, sub frame bushings, etc. The diff bushings really didn't make that much difference in noise.

Since I will not track the car and the abuse only consists of acceleration pulls from a roll, could I postpone the diff cooler if I do get the Z1 finned cover and the Nismo GT L.S.D Pro or the upgraded diff may get hot without an aftermarket diff cooler?

Spooler · 11-16-2020, 02:02 PM

Quote:

Originally Posted by NissanZ34

I have searched for the Nismo and the SPL subframe bushings. It appears that the Nismo kit includes shims for adjustment. The price is significantly higher than Z1 or SPL but since it can be ordered at the dealership I could then avoid paying for the shipping.

Do you have the solid or polyurethane transmission mounts and what are your motor mounts? What diff cooler would you recommend?

I run a stock transmission mount. Too damn noisy otherwise. I have CJ Motorsports motor mounts. They are noisy and have some vibrations. Once you are moving, you don't notice it. IF I had to do it again I might would go with the Z1 poly motor mounts.

Spooler · 11-16-2020, 02:03 PM

Quote:

Originally Posted by NissanZ34

Since I will not track the car and the abuse only consists of acceleration pulls from a roll, could I postpone the diff cooler if I do get the Z1 finned cover and the Nismo GT L.S.D Pro or the upgraded diff may get hot without an aftermarket diff cooler?

Go with a Wavetrac, that is your best bet and cheaper overall since you don't have to have a cooler.

-ZS-Carpenter · 11-16-2020, 04:41 PM

Quote:

Originally Posted by Spooler

I run a stock transmission mount. Too damn noisy otherwise. I have CJ Motorsports motor mounts. They are noisy and have some vibrations. Once you are moving, you don't notice it. IF I had to do it again I might would go with the Z1 poly motor mounts.

No extra noise with the Torque Solutions trans mount

Sent from my SM-G965U using Tapatalk

Spooler · 11-16-2020, 05:08 PM

Quote:

Originally Posted by -ZS-Carpenter

No extra noise with the Torque Solutions trans mount

Sent from my SM-G965U using Tapatalk

I will stay stock. I don't need to crack a block between the head studs and main studs.

Rusty · 11-16-2020, 06:45 PM

Quote:

Originally Posted by Spooler

Go with a Wavetrac, that is your best bet and cheaper overall since you don't have to have a cooler.

Rusty · 11-16-2020, 06:49 PM

Quote:

Originally Posted by NissanZ34

I have searched for the Nismo and the SPL subframe bushings. It appears that the Nismo kit includes shims for adjustment. The price is significantly higher than Z1 or SPL but since it can be ordered at the dealership I could then avoid paying for the shipping.

Do you have the solid or polyurethane transmission mounts and what are your motor mounts? What diff cooler would you recommend?

The SPL and Nismo parts are one and the same. SPL makes the parts for Nismo. Then Nismo marks them up. The only difference between them is color and the Nismo items have Nismo on them.

11-16-2020, 09:02 AM	#21 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,172 Drives: 2011 Nismo GM 6M Rep Power: 2684437	I had to cut the fins on mine for clearance with the FI exhaust. The Z1 cover increases the amount of lube by about 1/2 liter. I also have a diff cooler and a temp gauge installed. I've seen temps as high as 270F before turning on the pump and fan. With the cooler, there is 3 liters of lube in my set up. I have all of the SPL catalog on my Z. Solid diff bushings, sub frame bushings, etc. The diff bushings really didn't make that much difference in noise. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

11-16-2020, 09:08 AM	#22 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,792 Drives: 2013 Nismo 370z Rep Power: 2684392	I run the Z1 diff cover, OS Giken 1.5 way, Z1 poly diff mounts, and a modified Bellworks diff brace. My Subframe is solid mounted with Nismo/SPL subframe bushings. It's not bad or hard to deal with. No whining in the cabin. I hate that. That is why I have the poly mounts. I also run a diff cooler and that is a must have with a clutch diff. It is loud at a stop, driving you don't notice it so much. The Z1 cover you trim the bottom fins to clear. Last edited by Spooler; 11-16-2020 at 09:10 AM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[FOR SALE] NISSAN Fog Light, Hotchkis Sport Sway Bar, Hood Struts, Z1 Differential Upgrade Kit	amusez34	Parts for sale (Private Classifieds)	3	09-30-2020 03:53 PM
2009 Base differential 3.335 swap to 2015 Nismo LSD 3.69 Differential	kinitox	Engine & Drivetrain	6	03-30-2019 03:46 PM
[WTB] 2015+ nismo differential 3.9	lj909	Parts for sale (Private Classifieds)	8	08-26-2018 03:27 PM
Z1 Motorsports: Full Differential Upgrade Kit/Whiteline Diff Bushings	John@Z1	Drivetrain/Engine	39	06-12-2017 10:46 AM
Help! Need the differential bearing size/measure for an aftermaket differential	tkramwinkel	Engine & Drivetrain	1	10-02-2012 05:49 AM

11-14-2020, 12:05 PM	#17 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 6	Is the Bell diff brace negligible if I put urethane diff bushings and urethane transmission mount along with urethane motor mounts? I don't want to buy parts that will not fit my car. I'm just looking to reduce power loss since I've already done my exhaust and clutch system. Now for my engine, I was leaning toward the Z1 2.5" intake because they say it can be run without a tune and can be tuned later for better results. Right now I have the silicone tubes and K&N drop-ins. Anybody been there that can chime in?

11-16-2020, 02:35 AM	#20 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 6	I managed to find an installation video on Youtube that shows the Z1 finned cover does not fit the GReddy GT Evolution exhaust. They had to cut the fins on the sides near the exhaust. I would guess the Bell brace won't fit either but on another installation video I've seen how they cut it. It's ugly but it seems to work anyway. All that being said, I am convinced for the Bell brace but I would like to have your opinion on the Z1 cover if it's worth the money and the trouble to cut some of the fins.