I just spoke with someone at strange engineering and i told them i wanted to buy a 12 bolt from them and asked them the usual how much tq and hp can it withstand to see how confident they are in ther product. Well she told me it was good for 800 hp and 650 rwtq however she knew people who ran more with no problems and people who ran less tq and hp and shredded it. She then went on to tell me that if i was serious about an indestructible rearend to get a 9 in Ford which strange doesnt even make for our cars so it would appear she was pretty honest or at least to the best of her knowledge. Ive searched this forum so many goddamn times and everyone seems to have conflicting opinions on whether the 12 bolt or Ford 9 in is better. I need to order my rearend and had pretty much decided on the strange 12 bolt but now Im back to being indecisive since this is so much money to spend i want to get it right the first time since i aint rich. I plan on ordering a rearend in the next 2 days and need help on which 1 to go with. I havent started researching specific cams or engine setups but i know when im done with my car it will be fully built with an ATI procharger pushing around 650 rwtq and a lot of horsepower and maybe nos one day. What do you guys think about the the 12 bolt vs the 9 in and what do u recommend

 

my 3rd gen performance book recommends the Ford 9" rear, claiming that it can handle the rigors of high performance camaros...

 

12 bolt is cheeper and i think if you brake it u are running some big time power!

 

i'm going 9" when i do my rear end. quick change gears, not to mention everybody and their brother can set one up. parts are cheap, gears are cheap, why not?

 

I've heard that the Ford 9" inch is the stronger of the two rearends, but the GM 12-bolt is more efficient and will make better power to the ground given the same engine/tranny.

 

yes that is true.

i put a 9" in my TA and i can tell you that it feels like it slowed down.
a few reasons to that:
heavier, MUCH heavier compared to the 10 bolt
uses more HP to turn

but it is strong, VERY strong

now a PLUS to the heavieness, is i feel it has balanced the car out, since it's so heavy in the front.

i also went up 200 rpms at highway speed, again the difference in the rear design and wieght??

there are pluses and minuses to a 12 vs 9.

both look cool, and function well when set up.
i paid 3k for my 9" but that included everything, and performance axels too.

 

Buy a moser center section w/ gears, nodular iron case w/ daytona pinion support and a spool. Use the math on their site to figure out what axles you need. Also get the housing from them as well. It's expensive as $hit, but they'll put up w/ 2000 hp. And no, that wasn't a typo. Every serious drag racer uses a 9". There's a reason. If you're worried about parasidic lose, then build a better motor.

 

Actually serious drag racers use a diff based on the 9" or use a Dana 60. I'm happy with my 9". Once I twist an axle, I'll upgrade to something better.

The hp loss difference between a 12 bolt and a 9" is only about 10 hp. Most people won't notice the difference.

The 9" is nice because all gear ratios fit on the same carrier. You buy a posi with 2.70 gears on it. Take the gears off and put some 5.13's on the same carrier. They even make a 7.00 gear ratio for the mud bog trucks.

 

Currie also makes an aluminum case and housing
as well as lighter wieght axels

again, i liked it cause it added rear weight to the car, and the true trac posi is flat out awseome

car leaves posi marks in a straight line easily

 

http://carcraft.com/techarticles/1038/