Bearing repacking v.some thoughts from repacking day and oil comments - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-06-2010, 06:00 PM   #21
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Originally Posted by Gotpsi? View Post
Also if you run a vacuum pump set up it helps seal your cylinders up and pulls fuel out of the oil by raising the boiling point, increasing your oil life.
I think a proper breather set-up may help me with the fuel dilution problem.
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Old 10-06-2010, 07:59 PM   #22
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Have you ever done an oil analysis to see if its worth changing oil hourly? I've shown that 6-hours on synthetic HDEO GIII is doable if your fuel contamination is in check (11.5:1 in my car) and my oil temps hover at 280*f on the track.
The "multiple times per event" car is a rally car.

I don't -really- have a "race" car. Just rally and autocross.

The Subaru rally car gets Rotella T6. I'll use the same stuff in my MX-5 powered Mazda Rally truck when it's completed next year.

The autocross car gets Torco. I've been using SR-5 and V-Series-SS. I went in with a friend and bought the remaining stocks from a distributor and still have a few dozen cases.

In the late '80s I used to autocross an F-Prepared Datsun 240Z. It was an extremely loose engine with very high compression. That engine got Mobil-1, which was about as good as it got back then. And it got changed out fairly often too. But I was inside the engine about every fourth event.
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Old 10-07-2010, 01:33 AM   #23
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Anyone know if NB bearings can be repacked?
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Old 10-13-2010, 01:31 PM   #24
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Is this too much?


Writeup on how to repack hubs. Ill probably make a little video when i do mine this weekend.

http://waltermotorsports.com/v/Racing/hub/
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Old 10-17-2010, 06:20 AM   #25
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This is what I took off:

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Size:  64.5 KB

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Size:  59.0 KB

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Views: 8
Size:  64.7 KB

This is what went back on:

Name:  IMG_9754.jpg
Views: 8
Size:  70.7 KB

Name:  IMG_9758.jpg
Views: 8
Size:  51.2 KB

Name:  IMG_9759.jpg
Views: 8
Size:  67.3 KB
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Old 10-17-2010, 01:11 PM   #26
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Wow i probably need to redo those, I just slapped some all purpose grease inside without taking the race out.
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Old 10-21-2010, 06:32 PM   #27
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Originally Posted by modernbeat View Post
The "multiple times per event" car is a rally car.

I don't -really- have a "race" car. Just rally and autocross.

The Subaru rally car gets Rotella T6. I'll use the same stuff in my MX-5 powered Mazda Rally truck when it's completed next year.

The autocross car gets Torco. I've been using SR-5 and V-Series-SS. I went in with a friend and bought the remaining stocks from a distributor and still have a few dozen cases.

In the late '80s I used to autocross an F-Prepared Datsun 240Z. It was an extremely loose engine with very high compression. That engine got Mobil-1, which was about as good as it got back then. And it got changed out fairly often too. But I was inside the engine about every fourth event.
Run a UOA, you're changing the oil too frequently and blowing money out your ***. I've done 5-hours at 275-290* sustained oil temps, driven 4 hours each way to and from the track, and the oil dropped viscosity but was still within an acceptable range. Food for thought I guess.
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Originally Posted by Aricjm15 View Post
Anyone know if NB bearings can be repacked?
They're the same in my experience aside from the rear hubs on a MSM.
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Is this too much?
Not too much for the outboard side, its too much on the inboard side because if the grease pushes out it will attract lots of brake dust and chew up the innards.
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This is what I took off:







This is what went back on:





I'd repack them annually if they don't die during the season. I always have 2-spares with me because sooner or later you'll need them.
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Old 10-21-2010, 07:36 PM   #28
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What was different about the rears on the msm? I replaced my rear bearings with standard issue Napa bearings.
I would give mad props to anyone that can get the rears out without breaking the bearing. The outer race stayed on the hub when i pressed mine apart and everything fell to **** in the bearing.
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Old 10-21-2010, 09:28 PM   #29
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What was different about the rears on the msm? I replaced my rear bearings with standard issue Napa bearings.
I would give mad props to anyone that can get the rears out without breaking the bearing. The outer race stayed on the hub when i pressed mine apart and everything fell to **** in the bearing.
The splines are fatter.

The center race coming out with the hub does not mean its damaged. The outboard race usually does not want to come off the hub so I simply clean it off, then bolt it back together. Its good insurance to repack the rear because changing them out SUCKS.
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