Who's making the move to STU?

Rusty · 10-21-2018, 11:45 PM

Quote:

Originally Posted by 12Autox

The caster on the Z1 A arms isn't adjustable, I just know it's a lot more than OEM. Harder to turn the steering wheel. Ok, so I did a time attack last weekend and my VSLD is not working now. Lots of wheel spin coming out of turns. I can't afford to get a good one, so hopefully the dealer can replace the fluid or something as a band-aid. I decided to go with BC Racing coilovers for next season instead of Konis. 12K front, 9K rear Swift springs.

Once the VLSD goes. It's done for. There is nothing other then replacing it. It's a sealed unit inside the carrier with silicone fluid inside it. You can change all the gear lube you want. But that will not help it. The only thing that helps the stock VLSD to live a little longer is a diff cooler.

Brendan · 10-24-2018, 10:01 AM

Quote:

Originally Posted by Justint5387

Just taking advice from 350z people. I am not sure if the 350z rates are something that we can use, I think the shorter wheelbase has something to do with it.

Here is a link to the spring rate calculator I made. It converts spring rates into hz. You just need to make sure the weights are accurate. All the values can be changed in case somebody has more reliable info, but I got all the values from a combination of forum info and my measurements.

Brendan · 11-06-2018, 09:19 AM

I'm in the home stretch of getting this diff done. A couple set backs but hopefully I can finish the job before our winter racing season starts and get some drive time on the new diff.

gomer_110 · 11-06-2018, 05:38 PM

Winter racing season? I hate you year round racing guys. Winter is supposed to be when you tear the car apart and make upgrades.

Rusty · 11-06-2018, 05:43 PM

Quote:

Originally Posted by gomer_110

Winter racing season? I hate you year round racing guys. Winter is supposed to be when you tear the car apart and make upgrades.

Winter projects.

Rusty · 11-06-2018, 05:43 PM

Quote:

Originally Posted by Brendan

I'm in the home stretch of getting this diff done. A couple set backs but hopefully I can finish the job before our winter racing season starts and get some drive time on the new diff.

What diff do you go with?

Hotrodz · 11-07-2018, 09:02 AM

Quote:

Originally Posted by gomer_110

Winter racing season? I hate you year round racing guys. Winter is supposed to be when you tear the car apart and make upgrades.

LMAO, winter is boost season and race season. I am heading to the track a week from this weekend and at least once a month until you guys wake your cars from their winter sleep.

Hidalgo · 11-07-2018, 01:13 PM

Winter = Grip and Rip Season ; )

Brendan · 11-07-2018, 04:36 PM

Quote:

Originally Posted by gomer_110

Winter racing season? I hate you year round racing guys. Winter is supposed to be when you tear the car apart and make upgrades.

Why not both?

Quote:

Originally Posted by Rusty

What diff do you go with?

os giken

Quote:

Originally Posted by Hidalgo

Winter = Grip and Rip Season ; )

Finished it last night. I'm glad I did the bushings as well as everything feels much sharper. On my short test drive they made the biggest difference. I am pleased with how not race car this diff feels. Car drives completely normally. The only hint I got of the increased performance was finishing an on ramp. Normally I get a little slip and a tcs light, but the car just put down the power and exited clean. I will hopefully get some seat time in December and report back.

Rusty · 11-07-2018, 07:17 PM

Quote:

Originally Posted by Brendan

Why not both?

os giken

Finished it last night. I'm glad I did the bushings as well as everything feels much sharper. On my short test drive they made the biggest difference. I am pleased with how not race car this diff feels. Car drives completely normally. The only hint I got of the increased performance was finishing an on ramp. Normally I get a little slip and a tcs light, but the car just put down the power and exited clean. I will hopefully get some seat time in December and report back.

Are you using the OS Giken gear lube? Use anything else makes the diff noisy, and it will chatter.

What was your backlash before and after?

Brendan · 11-08-2018, 09:24 AM

Quote:

Originally Posted by Rusty

Are you using the OS Giken gear lube? Use anything else makes the diff noisy, and it will chatter.

What was your backlash before and after?

I am using castrol 75w90 for the 1000 miles/first event, then switching to the osg lube. I had a friends shop do the backlash and it is currently .004.

Rusty · 11-08-2018, 09:49 AM

Quote:

Originally Posted by Brendan

I am using castrol 75w90 for the 1000 miles/first event, then switching to the osg lube. I had a friends shop do the backlash and it is currently .004.

The ones that I have done run from .0025 to.0035.

Brendan · 12-05-2018, 10:56 PM

First event on the diff is this weekend. So far no chatter or noise but it's been pretty cold since I've installed it. I have around 200 street miles so far.

Brendan · 12-09-2018, 08:24 PM

Here is a link to my ig post of my ftd. Diff feels great. I ran this event with everything else stock save for the diff and rear diff bushings. It is such a great feeling to have the car rotate on throttle instead of just plow through a corner. There are still some front end grip issues due to old tires and camber, but mostly old worn tires. I probably wont do anything about the tires until the real season starts.

Aside from tires, I will be doing the the suspension before the next season but I'm still undecided on the frequency I want to operate in. I read a few years back that street tires work best around 2hz but I don't know if that is still true for the current street tire offerings.

Brendan · 03-05-2019, 06:21 PM

Ordered suspension. I went with the Fortune 500 series with hyperco springs. From my research on the 500 vs the 510, the 500 seemed more appropriate for what I wanted since I still want the car to be streetable and autocross on pretty old pavement. The nice thing about Fortunes is that if I decide to, I can have my 500 rebuilt however I want. I went with 13k front and 12k rear which will put me right around 2hz. I have all the camber products but I am just waiting the coils to arrive in the next couple of weeks.

11-06-2018, 05:38 PM	#94 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36941	Winter racing season? I hate you year round racing guys. Winter is supposed to be when you tear the car apart and make upgrades. DarkJak, Rusty and Hotrodz like this. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

11-07-2018, 01:13 PM	#98 (permalink)
Hidalgo Base Member Join Date: Sep 2017 Location: South Florida Posts: 68 Drives: Soon Rep Power: 8	Winter = Grip and Rip Season ; ) Hotrodz likes this.

12-05-2018, 10:56 PM	#103 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 645 Drives: Poor man's Porsche Rep Power: 542	First event on the diff is this weekend. So far no chatter or noise but it's been pretty cold since I've installed it. I have around 200 street miles so far. Justint5387 and tims370z like this.

12-09-2018, 08:24 PM	#104 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 645 Drives: Poor man's Porsche Rep Power: 542	Here is a link to my ig post of my ftd. Diff feels great. I ran this event with everything else stock save for the diff and rear diff bushings. It is such a great feeling to have the car rotate on throttle instead of just plow through a corner. There are still some front end grip issues due to old tires and camber, but mostly old worn tires. I probably wont do anything about the tires until the real season starts. Aside from tires, I will be doing the the suspension before the next season but I'm still undecided on the frequency I want to operate in. I read a few years back that street tires work best around 2hz but I don't know if that is still true for the current street tire offerings. tims370z likes this.

03-05-2019, 06:21 PM	#105 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 645 Drives: Poor man's Porsche Rep Power: 542	Ordered suspension. I went with the Fortune 500 series with hyperco springs. From my research on the 500 vs the 510, the 500 seemed more appropriate for what I wanted since I still want the car to be streetable and autocross on pretty old pavement. The nice thing about Fortunes is that if I decide to, I can have my 500 rebuilt however I want. I went with 13k front and 12k rear which will put me right around 2hz. I have all the camber products but I am just waiting the coils to arrive in the next couple of weeks. DarkJak and Rusty like this.

11-06-2018, 09:19 AM	#93 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 645 Drives: Poor man's Porsche Rep Power: 542	I'm in the home stretch of getting this diff done. A couple set backs but hopefully I can finish the job before our winter racing season starts and get some drive time on the new diff.

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