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Help me spec out a 9"

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Old Jan 22, 2003 | 06:44 PM
  #1  
Sears's Avatar
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Default Help me spec out a 9"

I hear you can change center sections with the 9", say if I wanted to swap gear ratios would it just be a bolt in deal?

What options to get with the 9"? All I know is I want a locker.

What else is worth the upgrade? Nodular case and gun drilled axles?

Thanks,
Justin
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Old Jan 22, 2003 | 07:30 PM
  #2  
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Default Re: Help me spec out a 9"

Changing gears can be as easy as a bolt on, as long as you have a complete spare center section. Are you sure you want a locker? Not my ideal choice for the street at all. But drag strip, yes. I went with a Powertrax No-Slip unit. It's like a soft acting locker that performs like a limited slip on the street. It holds 1000 hp. Also, if weight is a concern (and it should be) I would opt for an aluminum case. Weighs about 20 lbs less than a nodular case. I also went with a billet aluminum 1350 yoke, aluminum daytona pinion support, and 31 spline axles to save even more weight.
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Old Jan 22, 2003 | 07:43 PM
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Default Re: Help me spec out a 9"

Why do you say the locker is not ideal for a street car? I can tolerate the clicking and all. I don't want a spool b/c I like running fast in the twisties and am leaning to setting the car up more for road racing.

Justin
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Old Jan 22, 2003 | 08:26 PM
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Default Re: Help me spec out a 9"

Did you break your 12 bolt or something? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> If not what are you gonna do with it? <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
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Old Jan 22, 2003 | 08:31 PM
  #5  
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Default Re: Help me spec out a 9"

I am pretty sure the posi is on it's way out, the car was not heating the tires equally at the track this sunday. I am trying to sell it locally for $1200 as is.

Justin
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Old Jan 22, 2003 | 08:45 PM
  #6  
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Default Re: Help me spec out a 9"

what are the specs on it? I may be interested and I have a buddy who'd for sure be interested.
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Old Jan 22, 2003 | 08:50 PM
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Default Re: Help me spec out a 9"

Spec it out just like mine.

Locker (just changing it out for a spool now)
AL. center section
35 spline gun drilled and star flanged axles

As light or a hair ligher then a 12 bolt, a lot stronger, and much better gear ratio choices. <img border="0" title="" alt="[Razz]" src="gr_images/icons/tongue.gif" />
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Old Jan 22, 2003 | 09:04 PM
  #8  
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Default Re: Help me spec out a 9"

heh, I'll be over there soon placing my order. <img border="0" alt="[burn out]" title="" src="graemlins/gr_burnout.gif" /> How about you just sell me yours? <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Could you shoot me a rough price a 9" speced out like yours? ls1@fryrice.com

Goose,
SPECS HERE

Justin
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Old Jan 23, 2003 | 05:26 AM
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Default Re: Help me spec out a 9"

Id say go with the 9in.just had mine installed today.went with 3.89gears,h/d eaton posi,billet alum.1350 yoke,nodular case and 31 spline axles also make sure you tell them install a drain plug.this thing looks solid and bulletproof. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Old Jan 23, 2003 | 08:50 AM
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Default Re: Help me spec out a 9"

Link didn't work J... <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
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Old Jan 23, 2003 | 09:04 AM
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Default Re: Help me spec out a 9"

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Jsears8:
<strong> heh, I'll be over there soon placing my order. <img border="0" alt="[burn out]" title="" src="graemlins/gr_burnout.gif" /> How about you just sell me yours? <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Could you shoot me a rough price a 9" speced out like yours? ls1@fryrice.com

Goose,
SPECS HERE

Justin </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You have mail!! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />


Paul
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Old Jan 23, 2003 | 01:41 PM
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Default Re: Help me spec out a 9"

Probably not adding much to what has been said, but my .02:
The 9" rear has a mind boggling choice of gear ratios.
You can build multiple 'pumpkins' and change them very quickly.
The stock N case, or aftermarket cases are extremely strong, but so is the standard case. I doubt very seriously a street/strip car will break one. If you feel you must have a spool, steep gear, special case, or all of these... then build a pumpkin for the strip only and put it in when you run. For the street use a standard case, streetable gear, and Detroit locker... it'll last forever even with abusive street driving.
Use 31 splines or better.
Good luck
Dave

Edit: A note on aluminum cases...
They are cool for a strip car, but like I posted, set it up strip only and take it out for street driving. The aluminum cases flex excessively and wear your gears quickly with extended use. Aluminum also work hardends and will become brittle with repeated heat cycling.
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Old Jan 23, 2003 | 02:14 PM
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Default Re: Help me spec out a 9"

I have:

Moser housing
Strange nodular case
31 spline Moser axles
Tractech 31 spline 'soft' locker
4.11 strange gears

Center section is held in by 8 or 10 studs, just take them out, take a large flathead screwdriver, and pry out the center section. (after removing tq arm, and ds)
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Old Jan 23, 2003 | 02:48 PM
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Default Re: Help me spec out a 9"

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ratio411:
<strong> Aluminum also work hardends and will become brittle with repeated heat cycling. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Really? I wonder how my block and heads have lived so long then. No probs with my aluminum center section. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
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Old Jan 23, 2003 | 03:04 PM
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Default Re: Help me spec out a 9"

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LOnSLO:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ratio411:
<strong> Aluminum also work hardends and will become brittle with repeated heat cycling. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Really? I wonder how my block and heads have lived so long then. No probs with my aluminum center section. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That is why your block is sleeved. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Who makes the aluminum case? I think Strange... doesn't matter, the manufacturer even has a disclaimer saying what I posted. <img border="0" title="" alt="[Razz]" src="gr_images/icons/tongue.gif" />
Dave
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Old Jan 23, 2003 | 03:18 PM
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Default Re: Help me spec out a 9"

The sleeves don't keep the heat out though. My Strange CC has no such disclaimer. Even their tech dept. stated that the aluminum CC is great for street driving also. It just doesn't have the load bearing capabilities of the nodular iron unit. Anyway, back to Justin's post now...
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Old Jan 23, 2003 | 06:07 PM
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Default Re: Help me spec out a 9"

Goose check the link again. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

I just relized I can not retiain my 3 channel ABS with the 9". <img border="0" title="" alt="[Frown]" src="gr_sad.gif" />
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Old Jan 23, 2003 | 07:32 PM
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Default Re: Help me spec out a 9"

shat! I just emailed you about it and now see you only have 3 channel abs. Sucks for me <img border="0" title="" alt="[Frown]" src="gr_sad.gif" />
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Old Jan 23, 2003 | 08:59 PM
  #19  
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Default Re: Help me spec out a 9"

Well, if it were 4 channel ABS I'd probably take it, but... it's not. I kinda want to keep my TCS anyway. Did Jeff e-mail you?
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Old Jan 23, 2003 | 11:54 PM
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Default Re: Help me spec out a 9"

I hear that eaton is comming out with some type of electronic locker that works with electromagnets and so on. I saw it on their web site a couple of months ago.
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