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04 CTS-V with a little hp persuasion device
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I want it. I wonder how well it would take 177mph?
 

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05 Eforce LS3 V
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04 CTS-V with a little hp persuasion device
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4,167 Posts
Put that thing on the dyno and tell everybody to get away from it and run it up lol
 

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*cough* Now if someone could finish one in CF or aluminum for a lighter setup *cough*
Once we get our new cnc machines up and going we'll be making shafts, they will be a little different then this one though.

How long was this driveshaft? We have 3.5" aluminum driveshafts in GTO that are 50+ inches that handle 700-800 hp no problem.

Thanks
Chris
 

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Platinum 2004 CTS-V
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Once we get our new cnc machines up and going we'll be making shafts, they will be a little different then this one though.

How long was this driveshaft? We have 3.5" aluminum driveshafts in GTO that are 50+ inches that handle 700-800 hp no problem.

Thanks
Chris
Chris, I have an old driveshaft I can send you if you want to get specs from it and mock up something. I'm a team player dammit. lolz
 

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Chris, I have an old driveshaft I can send you if you want to get specs from it and mock up something. I'm a team player dammit. lolz
Sure, send it on over. I can probably use it for something.

Thanks
Chris
 

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Once we get our new cnc machines up and going we'll be making shafts, they will be a little different then this one though.

How long was this driveshaft? We have 3.5" aluminum driveshafts in GTO that are 50+ inches that handle 700-800 hp no problem.

Thanks
Chris


GTO is totally different..... The GTO can use a different slip yoke, the Caddy can not as it does not share the exact same trans.

The caddy needs a slip sleeve style AL shaft, which is a few hundred more right there.

The CF shaft is the same issue and would start at 3.750 outside diam...

The shaft in this car is 3.5"


Becareful when doing these mods, because as i seen 1st hand at some other shops expertise of squeezing a hanger in there and making me chase a vibration and wasted time until i thoroughly looked at what the other driveline shop did....problems solved....



As for the wanting to do 150 mph.... it is not the speed of the car that is the issue it is the speed of the shaft at 150 that is the issue...

So if you know what rpm you are at and at 150 mph in 1 to 1 then i can tell you what you need for that speed...

Safely the AL 3.5" shaft will spin faster then stl, 4" AL would be the end all to any hp/rpm issue, but the room restraints in the tunnel and a need for solid or atleast nylon bushings at the rear diff would most definitely be required.


As of now i have another caddy and i have come across broken case diff mounts at the upper pin location.
Has anyone else suffered this issue, i already have the fix for this car without him needing to buy a new diff housing.
Has anyone else that is racing there Caddy noticed or had the same issue with the front mount bushing of the diff housing ? ? ?




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I'm curious as to how much power this will free up.
I'll tell you that tomorrow, i'll weigh the old factory shaft and weigh what is replacing that and what a Al shaft would weigh compared to both....

As for the OP's car, his issues were vibrations from lack of expertise in whoever did that original design....

That shaft wasn't lighter then the factory shaft, it was heavier though, so it would have robbed some hp compared to the factory weight, however with the unlivable vibration issue from just a lack of knowledge made that shaft useless.

I expect that the non lightened stl shaft in the OP's car is not lighter then the factory shaft, it is way lighter then the other aftermarket junk that was in there, however it is stronger and doesn't incorporate a flimsy hanger bearing with the ability to shred itself under severe racing conditions.


Driveshafts are just a tube and go...so becareful who does what... I have seen other shops do stupid shit, just because they have no clue, and when a shaft comes apart from a speed related issue, you can die...




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2005 CTS-V, Black
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:food-snacking:
 

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05 CTS-V
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I changed out all my bushing and clutch and still get a slight clunk.
I think alot of the noise comes from our driveshaft. Also I bet a 1 piece will tranfer power better to the ground.

But super shaft is right , You dont want just any ol phoney make you a shaft because If it breaks It can do some damage.
 
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