Truck 10 bolt or Truck 12 bolt

[Vbb199]

3 options, 14 bolt FF, 9" or Dana 60. The 10 or 12 bolt weren't meant for 800 HP.

If I could find an older dodge or Ford Dana 60 car rear end in 5 lug, I'd be down for that also. But sheeeeiiittttt
Good luck on that one lol

 

[dvdswan]

If I could find an older dodge or Ford Dana 60 car rear end in 5 lug, I'd be down for that also. But sheeeeiiittttt
Good luck on that one lol

Technicalities. These were mere suggestions to assist with your problems on hand. LOL

 

[Craig 85]

I'll throw another thought out there. The early 90's 1/2 ton 454SS pickups had a SF 14 bolt 5 lug set up.

 

[WFO]

I'll throw another thought out there. The early 90's 1/2 ton 454SS pickups had a SF 14 bolt 5 lug set up.

And those 454 SS trucks were only putting out less than 250 horsepower.

 

[Craig 85]

And those 454 SS trucks were only putting out less than 250 horsepower.

I was just throwing it out there as a possible cheap option. I'm well aware of the low HP ratings. My GM rebuilt 454 in my K30 is a 1990 version with a whopping 230 HP...

 

[WFO]

I was just throwing it out there as a possible cheap option. I'm well aware of the low HP ratings. My GM rebuilt 454 in my K30 is a 1990 version with a whopping 230 HP...

They do have 385 pounds of torque though.

I just meant that the 10, 12 (truck) or 14 bolt aren't really built for high power holeshots, at least not for long.

 

[Vbb199]

Kinda reminds me of the time I was in my buddies Tahoe. We're riding down the road and start hearing this roaring and say "is that the wheel bearing, or the tire?"

*stomps on gas*
"We'll find out at 80"

 

[MikeB]

I don't know much about 9-inch Fords, but I do know the early models had 28-spline axles. If you get one, make sure it has 31-spline axles, unless you plan to replace the axles and side gears. Also, if you could find one with a nodular iron case, that would be cool. Look for the "N" cast into the case.

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[bthomas]

9” eats too much hp up. Strength doesn’t justify its parasitic until 1k hp imo. Especially in a truck application where traction is questionable

 

[Catbox]

9” eats too much hp up. Strength doesn’t justify its parasitic until 1k hp imo. Especially in a truck application where traction is questionable

This is a known factor as well.

This is from a source on the internet, Chevy High Performance.

"Another difference between the two rearends is that the 9-inch locates its pinion gear lower on the ring gear to improve tooth contact. This strengthens the rearend assembly but at the cost of approximately 2 to 3 percent loss of power to drive the gears compared to a 12-bolt. Of course, the sizes of the gears, cases, and bearings are relevant to strength, so you have to give the strength comparison to the 9-inch with its 0.125-inch larger ring-gear diameter and internal pinion support."

 

[Bextreme04]

9” eats too much hp up. Strength doesn’t justify its parasitic until 1k hp imo. Especially in a truck application where traction is questionable

The numbers published in National Dragster, in a tech article by Evan Smith show:

Dana 60 - 5%
GM 12-bolt - 7%
Ford 9" - 10%

So 3% power loss difference between his 12 bolt and a 9". That would mean that at 600hp he would be losing about 18hp more from a 9" than he is from the 12 bolt. That may or may not be offset by differences in weight or strength... I'm not sure

 

[Vbb199]

The numbers published in National Dragster, in a tech article by Evan Smith show:

Dana 60 - 5%
GM 12-bolt - 7%
Ford 9" - 10%

So 3% power loss difference between his 12 bolt and a 9". That would mean that at 600hp he would be losing about 18hp more from a 9" than he is from the 12 bolt. That may or may not be offset by differences in weight or strength... I'm not sure

This is a known factor as well.

This is from a source on the internet, Chevy High Performance.

"Another difference between the two rearends is that the 9-inch locates its pinion gear lower on the ring gear to improve tooth contact. This strengthens the rearend assembly but at the cost of approximately 2 to 3 percent loss of power to drive the gears compared to a 12-bolt. Of course, the sizes of the gears, cases, and bearings are relevant to strength, so you have to give the strength comparison to the 9-inch with its 0.125-inch larger ring-gear diameter and internal pinion support."

9” eats too much hp up. Strength doesn’t justify its parasitic until 1k hp imo. Especially in a truck application where traction is questionable

I did some more reading in my own spare time, plus all of your wonderful gentlemens input, and decided I'm going to build the truck 12.

Especially after learning about @CoggedBelt75 running a 12 bolt behind a truck with a trans brake and blown 383 stroker.

He's a modest man, and won't reveal his HP numbers, but I suspect when he's spraying it with laughing gas + his supercharger we're close to or on par in HP and torque.

I don't think I have much to worry about as long as I build the 12 bolt well.

 

[CoggedBelt75]

I did some more reading in my own spare time, plus all of your wonderful gentlemens input, and decided I'm going to build the truck 12.

Especially after learning about @CoggedBelt75 running a 12 bolt behind a truck with a trans brake and blown 383 stroker.

He's a modest man, and won't reveal his HP numbers, but I suspect when he's spraying it with laughing gas + his supercharger we're close to or on par in HP and torque.

I don't think I have much to worry about as long as I build the 12 bolt well.

Nope. No n2o. Would rather run a Super Chiller but not worth the expense. And I really don’t know any numbers. If I did I wouldn’t give them out anyways. It kills the local guys not knowing what it puts out or track times. I prefer it that way. If I wanted to go fast, I woulda went the procharger route.

 

[Catbox]

Nope. No n2o. Would rather run a Super Chiller but not worth the expense. And I really don’t know any numbers. If I did I wouldn’t give them out anyways. It kills the local guys not knowing what it puts out or track times. I prefer it that way. If I wanted to go fast, I woulda went the procharger route.

The roots superchargers just look so much better.

 

[Vbb199]

Nope. No n2o. Would rather run a Super Chiller but not worth the expense. And I really don’t know any numbers. If I did I wouldn’t give them out anyways. It kills the local guys not knowing what it puts out or track times. I prefer it that way. If I wanted to go fast, I woulda went the procharger route.

I've already seen the secret sauce from my personal experience....

Its not the amount of HP.

It's the efficiency of the PowerPlant that's inside a <4000 # truck