Drive shaft- alum vs moly vs carbon vs price ?

[Morris]

Originally Posted by 1795

Was waiting to hear your input on this one Morris. Wanted to have mine set up right.

Jim

Jim

You might have to change the Yoke on the Pinion nose cause most Dana 44's have a Yoke for a Spicier 1310 U-Joint... and they are fine for the street where they don't tax the drive line.... but racing .... is a different story.

You can buy a yoke for the transmission any size you want. stay with good quality products.

[patrickt]

Originally Posted by Morris

Jim

You might have to change the Yoke on the Pinion nose cause most Dana 44's have a Yoke for a Spicier 1310 U-Joint... and they are fine for the street where they don't tax the drive line.... but racing .... is a different story.

You can buy a yoke for the transmission any size you want. stay with good quality products.

This is kind of interesting. The theory at ERA, when they were building my car, was that for a predominantly street driven build, they wanted a Spicer 1330 Series on the front of the driveshaft, and a 1310 Series on the back of the driveshaft. Their theory was that if something locks up badly, and one of the u-joints is definitely going to go, then they wanted to control which one did, and they wanted the rear to be the one that went. Of course there's a driveshaft hoop and, their theory is they wanted the driveshaft flopping around only until you threw the clutch in, not until you came to a stop. Over the last decade, I've heard smart engineers endorse that theory and other ones call it stupid. So, pick your poison, I guess....

[Morris]

Originally Posted by patrickt

This is kind of interesting. The theory at ERA, when they were building my car, was that for a predominantly street driven build, they wanted a Spicer 1330 Series on the front of the driveshaft, and a 1310 Series on the back of the driveshaft. Their theory was that if something locks up badly, and one of the u-joints is definitely going to go, then they wanted to control which one did, and they wanted the rear to be the one that went. Of course there's a driveshaft hoop and, their theory is they wanted the driveshaft flopping around only until you threw the clutch in, not until you came to a stop. Over the last decade, I've heard smart engineers endorse that theory and other ones call it stupid. So, pick your poison, I guess....

In all of our Race Cars and all of the Trans Am Cars I drove and maintained over the last 30 years .... we use a Spicer 1350 U-joint and have never had a failure......

Do you think there is a reason for using the best products you can use ......

Lose a race or DNF in a Race and you'll understand why you never error on the side of Questionable products.... Always go with the Quality and Safety products. Especially when it's in the car next to your legs and butt.

[patrickt]

Agreed. Do you see any sense in having one u-joint intentionally larger, or smaller, than the other u-joint with the intention of controlling which one goes in the event that something happens that forces the occurrence of one of them having to go? Or was that just a case of an engineer over-thinking the equation....

[Morris]

Originally Posted by patrickt

Agreed. Do you see any sense in having one u-joint intentionally larger, or smaller, than the other u-joint with the intention of controlling which one goes in the event that something happens that forces the occurrence of one of them having to go? Or was that just a case of an engineer over-thinking the equation....

Patrick

Engineers always try to figure out smaller ways to to do things and that's there profession...... but Experience has overcome many engineering idea's....

So I believe we should listen to them then use our experience to make a intelligent decision on the side of Speed and Safety.

But when you are spinning a Drive Shaft at 7500 rpm's next to your body.... well that ends the question....

And I don't want a driveshaft failing on the rear or front on my car for one second.... the drive shaft can do a lot of damage in 2-3 seconds that it's going crazy.......you may not be able to put the clutch in at that point........that is just not smart....

That's like walking up to a Tiger and slapping him in the face and saying "now you got 2-3 seconds to go like mad".....

[patrickt]

Nobody wants any u-joints failing any where, any time. But, if the little race fairy said to you "Morris, one of your driveshaft u-joints is going to fail. I'm not going to tell you when or how it's going to fail, but I'm going to let you pick whether it's the front or the back one." What would you tell the race fairy?

[Morris]

Originally Posted by patrickt

Nobody wants any u-joints failing any where, any time. But, if the little race fairy said to you "Morris, one of your driveshaft u-joints is going to fail. I'm not going to tell you when or how it's going to fail, but I'm going to let you pick whether it's the front or the back one." What would you tell the race fairy?

Patrick

I'd tell the Race Fairy to go Kiss a Rattle Snake and tell me how it feels....

I might then tape a photo of my car's front end on their mirror.... so they see what it looks like ..... cause all they are going to see is my Rear end in the Race....

Then tell her that there are other Competitors out there that need her advise...Please feel free to talk to them......

[FUNFER2]

Originally Posted by Morris

Patrick

Engineers always try to figure out smaller ways to to do things and that's there profession...... but Experience has overcome many engineering idea's....

So I believe we should listen to them then use our experience to make a intelligent decision on the side of Speed and Safety.

But when you are spinning a Drive Shaft at 7500 rpm's next to your body.... well that ends the question....

And I don't want a driveshaft failing on the rear or front on my car for one second.... the drive shaft can do a lot of damage in 2-3 seconds that it's going crazy.......you may not be able to put the clutch in at that point........that is just not smart....

That's like walking up to a Tiger and slapping him in the face and saying "now you got 2-3 seconds to go like mad".....

I was in the pits one time watching a dirt Modified race at our local track. A driver blew his tranny to hell and parts went everywhere. Although all cars are ruled to have a driveshaft hoop, he did not have it welded and mounted properly, the shaft broke at the tranny end and it stuck in the clay track, and Catapulted the car 25ft in the air like a pole vaulter !

It became funny, because the driver came out of his car laughing his ass off !

Until the track inspector found his shaft and both knuckles were Illegal !!!

[Morris]

Originally Posted by FUNFER2

I was in the pits one time watching a dirt Modified race at our local track. A driver blew his tranny to hell and parts went everywhere. Although all cars are ruled to have a driveshaft hoop, he did not have it welded and mounted properly, the shaft broke at the tranny end and it stuck in the clay track, and Catapulted the car 25ft in the air like a pole vaulter !

It became funny, because the driver came out of his car laughing his ass off !

Until the track inspector found his shaft and both knuckles were Illegal !!!

How Scary is that....

[FUNFER2]

Patrick, that actually makes a lot of sense.
Thank you.

[1795]

Originally Posted by Morris

Jim

You might have to change the Yoke on the Pinion nose cause most Dana 44's have a Yoke for a Spicier 1310 U-Joint... and they are fine for the street where they don't tax the drive line.... but racing .... is a different story.

You can buy a yoke for the transmission any size you want. stay with good quality products.

Morris,

Ordered the 1350's, which is what I have on the Spicer half-shafts. Will check the differential, got a Spicer yoke for the transmission.

Thanks.

Jim