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Who's making the move to STU?

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

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Old 10-21-2018, 11:45 PM   #91 (permalink)
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Originally Posted by 12Autox View Post
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.
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Old 10-24-2018, 10:01 AM   #92 (permalink)
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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.
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Last edited by Brendan; 10-24-2018 at 10:09 AM.
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Old 11-06-2018, 09:19 AM   #93 (permalink)
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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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Old 11-06-2018, 05:38 PM   #94 (permalink)
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Winter racing season? I hate you year round racing guys. Winter is supposed to be when you tear the car apart and make upgrades.
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Old 11-06-2018, 05:43 PM   #95 (permalink)
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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.
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Old 11-06-2018, 05:43 PM   #96 (permalink)
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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?
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Old 11-07-2018, 09:02 AM   #97 (permalink)
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Originally Posted by gomer_110 View Post
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.
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Old 11-07-2018, 01:13 PM   #98 (permalink)
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Winter = Grip and Rip Season ; )
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Old 11-07-2018, 04:36 PM   #99 (permalink)
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Originally Posted by gomer_110 View Post
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?
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What diff do you go with?
os giken
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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.
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Old 11-07-2018, 07:17 PM   #100 (permalink)
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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?
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Old 11-08-2018, 09:24 AM   #101 (permalink)
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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.
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Old 11-08-2018, 09:49 AM   #102 (permalink)
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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.
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Old 12-05-2018, 10:56 PM   #103 (permalink)
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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.
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Old Yesterday, 08:24 PM   #104 (permalink)
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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.
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