Blue Bayou S13 - VQ30DE Endurance Build (Tons of pics and video!) - Page 3 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

cured13 · 05-31-2021, 04:45 PM

Silvia's Helical diff is what I need in my life, haha.
I remember you writing on NRR about installing s15 helical and using Ford alternator bushings as a spacers for ring gear bolts.
Would you share what model/year Ford alternator bushing were these? The Nismo conversion bolts I heard are discontinued now and rather expensive for what they are.

What is your experience with these spacers, did they lasted without problems or are there other bolts from other cars that can be used instead of Nismos?

knate · 06-07-2021, 01:28 AM

Quote:

Originally Posted by cured13

Silvia's Helical diff is what I need in my life, haha.
I remember you writing on NRR about installing s15 helical and using Ford alternator bushings as a spacers for ring gear bolts.
Would you share what model/year Ford alternator bushing were these? The Nismo conversion bolts I heard are discontinued now and rather expensive for what they are.

What is your experience with these spacers, did they lasted without problems or are there other bolts from other cars that can be used instead of Nismos?

You have a good memory! We just went to a shop that rebuilt alternators and gave them sizes.

I have a few more in my toolbox so I just grabbed them. They are 12.03mm (0.4736") ID and 13.14mm (0.517") OD and 18.36mm long.

After a bunch of digging around.. I think I may have discovered they are actually starter bushings. I found on Summit this bushing which is super close to what I have and should work:

https://www.summitracing.com/parts/smp-x4349

I believe I also found the exact bushing I have as it's pretty much perfect match on all dimensions including length. It's a Delco starter bushing:
https://qpselectric.com/en/bushings/4239-62-1400.html

This diff lasted for quite a few years of street driving, drifting, and racing. It just recently came out of the race car to swap out gearing, so these bushings worked great. I have also heard of people not using any bushing, and just "preloading" the slack towards the acceleration side, but these bushings are cheap piece of mind. I just had to cut them shorter with a tubing cutter, so I actually got two from each one.

nick_d_240sx · 06-07-2021, 05:12 PM

Quote:

Originally Posted by knate

Thanks Nick, I appreciate you following along and commenting! What team was your brother there with?

TSR Tidrick Sundberg Racing. This might have been over 10 years ago..

That's great seeing Randy driving your car! Super cool!

knate · 06-08-2021, 07:58 PM

Quote:

Originally Posted by nick_d_240sx

TSR Tidrick Sundberg Racing. This might have been over 10 years ago..

That's great seeing Randy driving your car! Super cool!

Nice! Yeah Randy is amazing to get feedback from and tons of fun to have around.

Toxocara995 · 06-23-2021, 07:20 AM

Quote:

Originally Posted by knate

Good point! They are technically sealed, but can be disassembled. I think it's only important when you expect to put a ton of heat into them like we do. I did actually video the whole process the last time I did it, so I can put together a "How-to" video.

The rears don't see nearly as much heat. I recently took apart our rears to replace as they are unknown mileage units we put on used, then raced for ~200 hours on them and they look just fine. Some of the grease is a bit brown, but most of it is still light colored.

Did you ever happen to put together that how to video? Was up way too early this morning and was thinking about this post out of the blue.

Sent from my HD1900 using Tapatalk

knate · 07-11-2021, 11:46 PM

Quote:

Originally Posted by Toxocara995

Did you ever happen to put together that how to video? Was up way too early this morning and was thinking about this post out of the blue.

Sent from my HD1900 using Tapatalk

No.. but thanks to your reminder I got started on editing tonight.

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05-31-2021, 04:45 PM	#61
cured13 Zilvia Addict Join Date: Apr 2008 Location: Almostthere Posts: 690 Trader Rating: (11) Feedback Score: 11 reviews	Silvia's Helical diff is what I need in my life, haha. I remember you writing on NRR about installing s15 helical and using Ford alternator bushings as a spacers for ring gear bolts. Would you share what model/year Ford alternator bushing were these? The Nismo conversion bolts I heard are discontinued now and rather expensive for what they are. What is your experience with these spacers, did they lasted without problems or are there other bolts from other cars that can be used instead of Nismos?