Lightweight 12 bolt / 9" options
Lightweight 12 bolt / 9" options After 2 days of sunshine in Oregon, I guess it's time to clean the old car up and get it runnin' again and ready for the season.
I've been looking into 12bolt/9" options. I thought about trying a Currie 12 bolt/9" but they don't offer the options I want, including gun-drilled axles, aluminum spool etc. Now Moser has some pretty good lightweight setups in my opinion.
Here is some interesting info. I found.
9" Aluminum centersection - 18lbs savings
9" Aluminum Spool - 4.5lbs actual (4.5-5lbs weight savings over steel spool)
35 spline Gundrilled axles - 34 lbs actual (7 lbs savings)
12 bolt Aluminum Spool - 5.1 lbs actual (4.4 lbs savings)
33 spline Gundrilled axles - 33 lbs actual (6.25 lbs savings)
33 Spline Eaton Posi - 22lbs
They're priced comparably, so I'm going with the 12 bolt. Assuming the fully optioned 33 spline Eaton posi 12 bolt is 196 lbs, the aluminum spool and gundrilled axles will shave about 23 lbs of rotating weight!!! and weigh around 173lbs. That's just 10-15lbs more than the stock 10 bolt and will probably have less rotating weight.
Oh the aluminum spool in the 12 bolt is $150 more than the steel spool, but the 9" aluminum spool is the same price as the 9" steel spool??? The gundrilled axles are a bargain at $100 for 6.25lbs of rotating weight reduction and they still gurantee the axles.
Just thought the hardcore guys might wanna know. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> If you have any more suggestions for losing weight in the rear, feel free to share.
I've been looking into 12bolt/9" options. I thought about trying a Currie 12 bolt/9" but they don't offer the options I want, including gun-drilled axles, aluminum spool etc. Now Moser has some pretty good lightweight setups in my opinion.
Here is some interesting info. I found.
9" Aluminum centersection - 18lbs savings
9" Aluminum Spool - 4.5lbs actual (4.5-5lbs weight savings over steel spool)
35 spline Gundrilled axles - 34 lbs actual (7 lbs savings)
12 bolt Aluminum Spool - 5.1 lbs actual (4.4 lbs savings)
33 spline Gundrilled axles - 33 lbs actual (6.25 lbs savings)
33 Spline Eaton Posi - 22lbs
They're priced comparably, so I'm going with the 12 bolt. Assuming the fully optioned 33 spline Eaton posi 12 bolt is 196 lbs, the aluminum spool and gundrilled axles will shave about 23 lbs of rotating weight!!! and weigh around 173lbs. That's just 10-15lbs more than the stock 10 bolt and will probably have less rotating weight.
Oh the aluminum spool in the 12 bolt is $150 more than the steel spool, but the 9" aluminum spool is the same price as the 9" steel spool??? The gundrilled axles are a bargain at $100 for 6.25lbs of rotating weight reduction and they still gurantee the axles.
Just thought the hardcore guys might wanna know. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> If you have any more suggestions for losing weight in the rear, feel free to share.
TECH Fanatic
Joined: Nov 2001
Posts: 1,055
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From: Baton Rouge, LA
Re: Lightweight 12 bolt / 9" options Jantzer, Have you looked at this Billingsley 12 bolt?
http://www.billingsleyracing.biz/prod02.htmThis rear-end complete with options weighs just 135 lbs.
Also, any changes to your car for this season?
http://www.billingsleyracing.biz/prod02.htmThis rear-end complete with options weighs just 135 lbs.
Also, any changes to your car for this season?
Re: Lightweight 12 bolt / 9" options I'm thinking about the 135# 12 bolt myself. Is that really possible? That with a shaved ring gear and axle flanges will get the weight below 130# for the rear. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Re: Lightweight 12 bolt / 9" options Got it! As long as I have you here, are the axles gun drilled? and are any brake or torque arm mounting brackets included?
I think you're going to sell a lot of these. A stronger rear end that is lighter than stock is a BIG plus to us 9/10 second guys!
I think you're going to sell a lot of these. A stronger rear end that is lighter than stock is a BIG plus to us 9/10 second guys!
Re: Lightweight 12 bolt / 9" options </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Mike Hoffpauir:
<strong> Jantzer, Have you looked at this Billingsley 12 bolt?
http://www.billingsleyracing.biz/prod02.htm This rear-end complete with options weighs just 135 lbs.
Also, any changes to your car for this season? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well the billingsley rear-end is narrowed from what I read. I'm not changeing wheels too. I have fikse's & drag wheels so the backspacing is perfect the way it is now.
Plenty of changes coming including newer head design (currently on the flow bench), more compression, bigger cam, ported LS6 intake, bigger cam (around 230), pin on hood, new twin 4" air intake sealed to my airbox, 28" hoosiers & 4.30 gears, POSSIBLY??? a 99 plastic tank, !Ebrake, carbon fibre t-tops, and a 10.50 timeslip. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Our local track doesn't open until april so I have some time. But I'll make a trip or two to sacramento before then for sure. The car will weigh under 3000 and make plenty more power than last year so it should be wild.
<strong> Jantzer, Have you looked at this Billingsley 12 bolt?
http://www.billingsleyracing.biz/prod02.htm This rear-end complete with options weighs just 135 lbs.
Also, any changes to your car for this season? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well the billingsley rear-end is narrowed from what I read. I'm not changeing wheels too. I have fikse's & drag wheels so the backspacing is perfect the way it is now.
Plenty of changes coming including newer head design (currently on the flow bench), more compression, bigger cam, ported LS6 intake, bigger cam (around 230), pin on hood, new twin 4" air intake sealed to my airbox, 28" hoosiers & 4.30 gears, POSSIBLY??? a 99 plastic tank, !Ebrake, carbon fibre t-tops, and a 10.50 timeslip. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Our local track doesn't open until april so I have some time. But I'll make a trip or two to sacramento before then for sure. The car will weigh under 3000 and make plenty more power than last year so it should be wild.
Launching!
Joined: Dec 2001
Posts: 208
Likes: 0
From: Decatur, Il
Re: Lightweight 12 bolt / 9" options The axles are not gun-drilled...the solid 33 spline is similar in weight/strength to a drilled 35 spline.
This combination is available in both the stock width and narrowed versions.
Thanks
This combination is available in both the stock width and narrowed versions.
Thanks
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Re: Lightweight 12 bolt / 9" options I guess I didn't read enough about Billingsley's rear-end. That thing is sweet!
Jay,
Does it come with an aluminum spool or steel version? And can I add gundrilled axles for $99? That will save another 6lbs or so. So it's $2199 + $99 for the lightweight flanges + $99 for the lightened ring gear + $99 or so for gundrilled axles? That would total about $2500. Is this complete with yoke & everything I need?
What is the build time on this rear? I'm very interested.
Jay,
Does it come with an aluminum spool or steel version? And can I add gundrilled axles for $99? That will save another 6lbs or so. So it's $2199 + $99 for the lightweight flanges + $99 for the lightened ring gear + $99 or so for gundrilled axles? That would total about $2500. Is this complete with yoke & everything I need?
What is the build time on this rear? I'm very interested.
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Verdad Gallardo TECH Fanatic
Joined: Nov 2001
Posts: 1,055
Likes: 0
From: Baton Rouge, LA
Re: Lightweight 12 bolt / 9" options </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Jantzer98SS:
<strong> Plenty of changes coming including new twin 4" air intake sealed to my airbox
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">https://ls1tech.com/ubb/cgi-bin/ulti...=002625#000026
<img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
<strong> Plenty of changes coming including new twin 4" air intake sealed to my airbox
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">https://ls1tech.com/ubb/cgi-bin/ulti...=002625#000026
<img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
TECH Fanatic
Joined: Aug 2002
Posts: 1,566
Likes: 0
From: Objects in mirror no longer matter.
Re: Lightweight 12 bolt / 9" options </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Jantzer98SS:
<strong>
33 spline Gundrilled axles - 33 lbs actual (6.25 lbs savings)
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">So who is right?
<strong>
33 spline Gundrilled axles - 33 lbs actual (6.25 lbs savings)
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">So who is right?
Launching!
Joined: Dec 2001
Posts: 208
Likes: 0
From: Decatur, Il
Re: Lightweight 12 bolt / 9" options Strange Engineering does not provide the gun-drilled option for 33 spline axles unless the car is like 1500 lb. I'm not sure about Moser, but with this diameter of spline, it does not leave much material left. <img border="0" alt="[driving]" title="" src="graemlins/gr_driving3.gif" />
Re: Lightweight 12 bolt / 9" options Moser offers them or they wouldn't of quoted me the weight savings etc. I don't see there being much difference in weight/strength from a 33lb 33spline vs. a 34lb 35 spline. Am I missing something?
TECH Fanatic
Joined: Aug 2002
Posts: 1,566
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From: Objects in mirror no longer matter.
Re: Lightweight 12 bolt / 9" options </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Jantzer98SS:
<strong> Moser offers them or they wouldn't of quoted me the weight savings etc. I don't see there being much difference in weight/strength from a 33lb 33spline vs. a 34lb 35 spline. Am I missing something? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The mass of the axle has little to do with its strength compared to where the mass is. A hollow shafts ability to resist torsional stress increases as the OD of the tube increases. I could see how the slightly thicker 35 spline would be much stronger.
<strong> Moser offers them or they wouldn't of quoted me the weight savings etc. I don't see there being much difference in weight/strength from a 33lb 33spline vs. a 34lb 35 spline. Am I missing something? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The mass of the axle has little to do with its strength compared to where the mass is. A hollow shafts ability to resist torsional stress increases as the OD of the tube increases. I could see how the slightly thicker 35 spline would be much stronger.
