Dan's Money Pit NYTRDR

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Originally Posted by MrAngry

If you're still on the fence on this one, I'll give you what I've learned. S60 is you intend to autoX, hammer corners, and occasionally drag race. 9" if you're going full on mental drag car. The 9" is heavier, and saps a bit more power, but will take massive amounts of abuse. The S60 is very tough, but not quite as tough as the 9". But, it's lighter.

That said, I put the S60 through massive abuse on slicks, and it held up great fro a long time, and a lot of nitrous. I ran a 9" with a spool afterwards. I could definitely tell the difference in weight, but I could stand that car on the bumper and not worry about the rear end breaking.

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You have things a little backwards.
From heaviest to lightest... S60, stamped 9", 12 bolt, fabricated 9" = 10 bolt
Most power consumption to least... Stamped or fab 9", S60, 12 bolt, 10 bolt

The weights are generalizations because they depend on your carrier (spool/LSD), axle splines/gun drilling/star flange, and third member (for the 9"). The S60 will be the heaviest and the fab 9" or 10 bolt will be the lightest with all the same bells and whistles. Keeping unsprung weight down is extremely important for autox or road racing. Reducing unsprung weight is second to strength for serious drag.

S60 vs 9"
The strength debate between these two is endless but they will both take a ton of shit (assuming the 9" is built with modern parts and not OE Ford junk from the 50s). The S60 has the bigger ring gear but the 9" has a pilot on the end of the pinion gear.
The S60 is heavier than a stamped 9" and a ton heavier than a fab 9".
The 9" will eat more power because of the offset pinion.
The 9" is typically more expensive.
The 9" has more aftermarket support, gear ratios, and the ability to swap third members on the fly.
If you just need a rear to hold up in a straight line, then get the S60 and save some money. If you want to do that and take corners, then get a 9" (but make sure you get tapered wheel bearings -- the ball bearing ones are for drag cars).

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Originally Posted by SJx408

AFAIK an S60 is essentially bullet proof, and virtually a direct fit. Lighter with less drivetrain loss, I'm going s60 down the road. 9" is nice if you're constantly wanting to change gearing for the strip. I plan on a little strip and road course use so the s60 fits my needs for an M6 car. @Dan what are your goals with the car?


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Honestly, my goals are a reliable car with powa! I intend on building a forged NA 383. It may or may not get boost. When this will happen, I have no idea. I drive this car spring to fall and I intend to until I decide it's time to get a different car to burn gas with and save this for this car for the weekends and woodward.

That said, I do not want to purchase a s60, and need to get a 9inch because I'm pushing the limits of the s60. I will go balls to the wall to make whatever I buy unbreakable.

That's what I'm saying though is the s60 may very well be unbreakable


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They can both be unbreakable. The 9" is just a little more versatile... which costs money.
The main reason I went with a 9" was so I could build third members on the side for drag only and swap them in before going to the track. That way you don't have to run around town with a spool all the time.

True that ^ which is why everyone has a different set up for different goals. I'm rarely going to see strip time but I'd like to know I can go and not break shit. Mainly a street car that will make trips to Mexico and the road courses. Build it from the rear forward. That's what I'm doing. Getting susp and driveline sorted before dipping into the engine. Plant the power you got and prepare for the future.


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You will never make no where even remotely close to the amount of power you need to break a dana 60. They're a very stout rear .

Who knows boys. I'll decide eventually..

My car is a pile of shit anyway. Why even invest any money into it right

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Originally Posted by Catmaigne

You have things a little backwards.
From heaviest to lightest... S60, stamped 9", 12 bolt, fabricated 9" = 10 bolt
Most power consumption to least... Stamped or fab 9", S60, 12 bolt, 10 bolt

The weights are generalizations because they depend on your carrier (spool/LSD), axle splines/gun drilling/star flange, and third member (for the 9"). The S60 will be the heaviest and the fab 9" or 10 bolt will be the lightest with all the same bells and whistles. Keeping unsprung weight down is extremely important for autox or road racing. Reducing unsprung weight is second to strength for serious drag.

S60 vs 9"
The strength debate between these two is endless but they will both take a ton of shit (assuming the 9" is built with modern parts and not OE Ford junk from the 50s). The S60 has the bigger ring gear but the 9" has a pilot on the end of the pinion gear.
The S60 is heavier than a stamped 9" and a ton heavier than a fab 9".
The 9" will eat more power because of the offset pinion.
The 9" is typically more expensive.
The 9" has more aftermarket support, gear ratios, and the ability to swap third members on the fly.
If you just need a rear to hold up in a straight line, then get the S60 and save some money. If you want to do that and take corners, then get a 9" (but make sure you get tapered wheel bearings -- the ball bearing ones are for drag cars).

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I appreciate you writing all that out. I've been researching it so far but only have been finding tidbits. So having it all right here makes it a lot easier. Thank you.

lulz at hotcam talk and worry about breaking a damn S60.

Good fucking luck with that.

Biggest downside to S60, is the lack of sub 3.54 gear sets other than that, its all gonna cost over 2k and its all gonna be overkill for anything you throw at it unless you plan on a sub 8 sec pass.

Quote:

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Originally Posted by Catmaigne

You have things a little backwards.
From heaviest to lightest... S60, stamped 9", 12 bolt, fabricated 9" = 10 bolt
Most power consumption to least... Stamped or fab 9", S60, 12 bolt, 10 bolt

The weights are generalizations because they depend on your carrier (spool/LSD), axle splines/gun drilling/star flange, and third member (for the 9"). The S60 will be the heaviest and the fab 9" or 10 bolt will be the lightest with all the same bells and whistles. Keeping unsprung weight down is extremely important for autox or road racing. Reducing unsprung weight is second to strength for serious drag.

S60 vs 9"
The strength debate between these two is endless but they will both take a ton of shit (assuming the 9" is built with modern parts and not OE Ford junk from the 50s). The S60 has the bigger ring gear but the 9" has a pilot on the end of the pinion gear.
The S60 is heavier than a stamped 9" and a ton heavier than a fab 9".
The 9" will eat more power because of the offset pinion.
The 9" is typically more expensive.
The 9" has more aftermarket support, gear ratios, and the ability to swap third members on the fly.
If you just need a rear to hold up in a straight line, then get the S60 and save some money. If you want to do that and take corners, then get a 9" (but make sure you get tapered wheel bearings -- the ball bearing ones are for drag cars).

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I stand corrected. I just noticed the rear suspension felt more responsive with the s60. More lively if that makes sense.




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