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Old 12-16-2005, 08:12 AM
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12 bolt or f&% 9 inch. ??

I have a brand new custom 540 engine on the way for my street / strip '68 camaro.

The engine dyno'ed at 799,4 hp at 6500 rpm and 743.4 lbs of torque at 5000 rpm. I don't know about nitrous yet, but I bet that some time in the future I'll have to try and see what this engine is really capable of.

I have a have a 12 bolt in the car now. but I have been told that, that will break the first time I fire up the new engine... so what to do??

I would like to keep my 12 bolt and just put a Detroit locker, new axles and c - clip eliminators in it.... but is that Strong enough ?? Or do I really need to go all out and buy a 9 inch?

btw. I run 10.5 inch slicks at the track.


sune

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Old 12-16-2005, 09:18 AM
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Those 10.5 tires are going to evaporate too!!

Go for a Ford 9".

Back in the 70's I raced a big cube BB Nova. I spent a small fortune trying to make a 12 bolt live. Welded/braced tubes, billet caps. Summers Bros. axles, Moroso unbreakable center. Still broke TONS of parts.

In those days a Chevy man wouldn't dare put a Ford rear in a GM car. But, now it is acceptable. Economical and reliable. Fairly lightweight.

Sure would have saved me a lot of CA$H. I eventually went with a Dana 60 rear. Huge, heavy and not without its own problems.
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Old 12-16-2005, 09:29 AM
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Quote:
Originally Posted by BOBCRMAN@aol.com
Those 10.5 tires are going to evaporate too!!

yes I know, but I have to race on them .... class rules.

... about that 9 inch. do I need one of those aftermarket units or can find an old piece, and install a new set of aftermarket axles and a quality center section?

sune
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Old 12-16-2005, 10:11 AM
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If your racing it competivly, I suggest calling Currie Enterprises.

If you playing around you might get away with a 9" but the money you will have invested will be a liitle short of the unit you won't break from Currie.

If you have the money and no rules, Currie

If bound by money and rules, an aftermarket 9"
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Old 12-16-2005, 12:05 PM
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You can have a 9" in your car and not have a single Ford part. The one I just built doesn't have a Ford part in it. It is all aftermarket and I used all Currie parts (except the axles are Dutchman).

How heavy the car is also makes a difference. If it is a 3500lb car then it will be harder on the rear end than a car weight 2500lbs.

I agree with that kind of power the 12 bolts will have a short life. This assumes the car will hook and with that kind of power it better hook.
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Old 12-16-2005, 12:24 PM
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Do the 9 inch , you won't be sorry.
Moser Engineering has about anything you need , from complete rears to custom axles.
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