[Scott Misus]

Doesn't Strange make a drop in 12-boat center section for a 9" housing?

[Bracket Racer]

There is a kit available I believe to use 12 bolt gearsets in 9 inch housings. The relationship of the ring to pinion on a 12 bolt does not rob as much power as a 9 inch is the reasoning I think.

[Scott Misus]

Yep.

Basically, it's like the old "Price is Right" vertical wheel. Remember that?

The 12 bolt or Dana or just about any other rear for that matter, is like grabbing that wheel (ring gear) right at the 3 o'clock position and pulling down on it. The 9" Ford is like bending over and grabbing it way down at the 5 o'clock position and pulling down on it from there.

Now, I ask you: which torque moment is going to provide the most efficient transfer of power?

The RinkAZink modulator helps some, but in this case, not that much.

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Never been banned here...
Because I've got MANNERS
....I've been warned a coupla times, though...

[David Holmberg]

Squirrel on a treadmill. ? [img]/infopop/emoticons/icon_biggrin.gif[/img]

['ol Pinion head]

My squirrel has a better moment of inertia...

Where's 1/2" stud???

[Half-Inch Stud]

My 12boat tubes are welded to the centersection.

Priced through Jegs, for 12boat:
30spline spool ; 150
30spline S/S Axle kit with C-elim stuff; 430

Lightweight 33spline spool ; 189
33spline S/S Axle kit with C-elim stuff; 610

...or skip-it, cash the 12Bolt, and call Moser...for a moly-tubed Dana60 housing.
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Run Nov 11 with stock 12Bolt Axles. My front wheels are toed-out real bad..no wonder it's a logger's ride at mid-high track. Front-End alignment and cool will probably sit me in the high 11's.
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Then full-tilt upgrade this winter.

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"his peg-leg got woodworm , and broke into three"--G. Baker

[boykoman]

John I think you should go with the 9 inch.Have you run that i.a combo 474 with nos and hooking yet on the 8.5 rear.That new combo of yours will make killer torque.

[John Langer]

477 cid but no nos. Everyone harps that the 9" is superior to everything else out there but I would like for someone to explain what is better other then the fact that the ring gear is 9" instead of 8.5" and the rotating mass is heavier. Oh wait, the mass doesn't help. I run the same size or larger axels, lighter spool, and smaller brakes. My housing is reinforced. I have a billet pinion yoke. Billet caps and studded. What else does a 9" have that I dont other then a bigger price tag. Pontiac people might not be familier with a guy named Dave Henniger. Dave has been running in various forms of heads up raceing with a 70 1/2 camaro. He has run on the other side of 8.50 seconds with a nitros set up in super street a few years ago and now runs a bastard v6 nitrous combo that runs 8.90's. All with a 8.5 10-bolt. Do they work, yes... you have to know how to build one.

[David Holmberg]

John L, on a side note: David Henninger Is looking for Karl Owens... If anyone can help...

Have him call David @ 810-757-1961 or page @ 800-892-3767

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That's my story and I'm sticking to it!


[This message has been edited by David Holmberg (edited 10-26-2000).]

[Half-Inch Stud]

Crysler 8.8 appears to be the most available stout rear, with a decent gear selection.
Otherwise the Heavy, and sloppy-toleranced Dana60. I'd go Dana60 before 9"Ford.

I looked at the 9". Don't like the looks...turns out I'm close to correct, as the only good 9"rears are ones with all aftermarket parts. Like Misus said, likened to the small chevy. Probably wise to leave the 9" with the street rods market, along with small chevys.

The 12Bolt is efficient.
The Big Car rears are tougher...no gears.
If all I need is 3:42:1, then I've got more than enough gear...you'll see. Running 3.31:1 to the high 11's hopefully at atco.

Corporate 10Bolt..sure, go run a Type O too.

When it comes to Musclecar rears; Looks matter...12Bolt, 10Bolt, Dana60, and the old Olds-Pontiac.

Oh, how about those independent rears? any one gonna go to bat for those??

[Scott Misus]

John:

How heavy are these 8.50 cars that aren't spitting out 8.5" rears?

Why aren't ProMod racers using them instead of 9" rears?

[Scott Misus]

Mark:

I recall a 15 year old glitter mag article about a guy who made an IRS for a Vette by using the Dana.....

Can you dig up that article?

[John Langer]

3100-3400 lbs. the pro-mod comment shows how narrow minded people can be

[Gach]

John, what are you running for heads on your 477 ? Oh doesn't Neal Owens run a 10 bolt rear, and that car weighs 3300 lbd I believe.

[Scott Misus]

John:

ProMod people aren't narrow minded; they know what breaks and what doesn't.

[boykoman]

Hey John what did you run with the 477 with out nos.Im very curious!

[Doug]

Scott, was that Dana-Vette setup done by the guy "Pepe" from California. Maybe I'm thinking about an article about him doing something like putting a 12 bolt carrier in a 10 bolt Vette setup? (More like 20-25 years ago too) Still got the mag somewhere.

['ol Pinion head]

The 8.5 corporates are real similiar to the 12 bolts in construction. The lack of ProGears in the 8.5 limits it's use in many cars which leave on an transbrake. Have personally built 8.5's which ended up in cars running down in the low 10's with spools, aftermarket axles & US Gears. I believe their housing strength is similiar to 12 bolts Chevys. With aftermarket caps& killer axles, LPW cover & bracing, they are tougher than most would expect. Weld the axle tubes to the housings on all of the leaf spring versions, as have even witnessed spun axle tubes in a 13 second street tired Camaro.

Personally like the moly tubed 9"s for verasatility. Dana 60's are alot more affordable to build & I can see their positives.

[John Langer]

My pro-mod comment wasn't directed to pro-mod people

[Craig Berkheimer]

So, Do you guy's think the Moser 12 Bolt Fabracated housing with 4130 tubes and the LPW cover with bracing should withstand consistant 1.35-60ft?
I,m just about ready to let the greenbacks go. What do you think?

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Outlaw Pontiac Racers Association
"For Those Who Live The Legend"
www.outlawpontiacs.com


JBP 416ci on Gasoline
#16 Dports 10.8-1 Compression
Weight - 3275
10.5 - 29.5 TIRE
Best ET: 60ft=1.39
1/8 =6.49@104mph
1/4 =10.29 @ 129mph