Denny's vs Dynotech

Critical speed for a 4" 6061 is slightly higher (read: basically the same) than a 3.5" MMC (I see that MW says this in thier info, as well Denny's told me this)...
I don't think you can go wrong with either place. I'd like to try out a carbon fiber shaft some day, they do look cool... :cool:
 
The question I sent to Mark Williams:

I had heard that MMC driveshaft tubing was no longer
available, can you still produce both 3.5" and 4" MMC Driveshafts?

And the answer from bbalsley@markwilliams.com was:

Yes we can!

Which begs the question; Why can't Denny's or Dynotech?
 
Found this.
clicky

Mark Williams Enterprises has been granted a U.S. Patent for its Accu-Bond™ bonding technology used to make ultra high strength aluminum and carbon fiber driveshafts. The patent, No. 7,485,045, covers the method by which carbon fiber, Duralcan® MMC and 6061 aluminum tubing is permanently mated to the CNC-machined 7075-T6 aluminum end yokes.
Click to expand...
Seems over kill to me for a DD
 
That carbon fiber shaft sure is a sweet looking piece!
 
i've had very good experience with denny's as well....although when i originally called about a driveshaft they told me only the mmc would work for my app. After the mmc wasn't available the 4" alum would work just fine.
 
lsc8 said:
i've had very good experience with denny's as well....although when i originally called about a driveshaft they told me only the mmc would work for my app. After the mmc wasn't available the 4" alum would work just fine.
Click to expand...

Presuming the same section modulus requirements, what that tells you is the 6061 material requires a bigger shaft that the MMC material.
 
Both places told me that the 4" 6061 is the same strength as the 3.5" MMC shaft (neither Dynotech nor Dennys offered a 4" MMC.) Thats why the critical speed is pretty well identical...
 
Those mark williams shafts are nice! Do i dare....? lol Shame the 4"MMC doesnt come with a yoke, they want like another 200+ bucks for them...thats over 1000 for a driveshaft! crazy! haha

I sent dynotech and denny's an email to see how much itll cost to produce a shaft with 1350 u joints. Since no one has anyone laying around from any of the boards it seems, looks like im dropping a few bucks on something new. :)
 
You'll have to replace the pinion flange on the diff as well if your going with a 1350 joint.
 
Icarus said:
You'll have to replace the pinion flange on the diff as well if your going with a 1350 joint.
Click to expand...

Yup, he knows, I'm building his diff.

Unfortunately, no one currently makes a 1350 yoke for the 4R70W, although Lux said that Mark Williams was thinking about it.
 
DLF said:
Yup, he knows, I'm building his diff.

Unfortunately, no one currently makes a 1350 yoke for the 4R70W, although Lux said that Mark Williams was thinking about it.
Click to expand...

Yeah. I guess the manual trans have a larger yoke available up front. I talked to dynotech they said i could upgrade the one in the back but i guess its kind of pointless. What do you guys think?
 
I think your going overboard on it imho, lol ;) ... A 4" shaft with 1330 joints should be plenty good, look at Mikes car or others around with SC's etc and what they are running...

Sounds like your in good hands with DLF building the diff though :)
 
Yeah I thought bout that. Since it already has to be custom made I figured why not get the bigger joints but you can't always get what you want lol
 
i only get vibes slightly with my 4.10's around like 80 - 85 then it goes away. Above and below nothing. I wonder if putting it back on the right way has anything to do with it. When we replaced the trans, we marked it up so we put it back the same way we took it out.

Regardless, if you're having vibes a strong balanced lightweight drive shaft is a good investment.
 
You must log in or register to reply here.

Members online

No members online now.
Total: 49 (members: 0, guests: 49)
Back
Top