Verus Carbon Fiber Driveshaft - New revision

[mike_b]

Had the same issue. Sent it straight back and received a full refund. No way I am accepting a 15lb part that is advertised as 10.9lb. What a ridiculous detail to leave out on a part where the primary point is weight reduction.

[billstock67]

Originally Posted by mike_b

Had the same issue. Sent it straight back and received a full refund. No way I am accepting a 15lb part that is advertised as 10.9lb. What a ridiculous detail to leave out on a part where the primary point is weight reduction.

Agreed. I was told "they didn't have time to update web site"

[mike_b]

If you guys are expecting an OEM level of NVH from a 1 piece drive shaft it’s not happening. I have had a number of carbon drive shafts on different platforms and they all make some noise at certain particular speeds. My BRZ is otherwise stock and my DSS carbon shaft starts to get a little noisy around 80, settles down, and then starts to get noisy again around 115-120. It’s not some violent banging or anything, but a buzz or hum that is slightly audible over the normal road noise.

[billstock67]

Originally Posted by mike_b

If you guys are expecting an OEM level of NVH from a 1 piece drive shaft it’s not happening. I have had a number of carbon drive shafts on different platforms and they all make some noise at certain particular speeds. My BRZ is otherwise stock and my DSS carbon shaft starts to get a little noisy around 80, settles down, and then starts to get noisy again around 115-120. It’s not some violent banging or anything, but a buzz or hum that is slightly audible over the normal road noise.

I have experienced similar on several platforms, and this is much more than "a little noisy". At 80+, fairly severe vibration of entire body structure.

[StraightOuttaCanadaEh]

^ ditto

It's like the car all of a sudden gained a couple of subs and they're about to vibrate the doors off the frame. Very sudden and unpleasant.

[mike_b]

Yeah, that sounds like a more significant problem. On most shafts I have seen they epoxy small weights to balance them. The new style verus shaft seemed to have a couple weights riveted on. It’s a dramatically different design in many ways.

[StraightOuttaCanadaEh]

Interesting read on the G37 forum. Seems they also had problems with driveshafts vibrating after installing diff bushings.

https://www.myg37.com/forums/engine-...ushings-2.html

Not understanding the solution fully though as I let my mechanic do all the work. They mention "flipping" the diff bushings fixed the issue.

[Turdinator]

Originally Posted by Ohio Enthusiast

Is the driveshaft clearcoated in some way? Or is it bare CF? Did you sand/scuff the CF before gluing?

No clearcoat just the resin. I did scuff it.

[billstock67]

Originally Posted by StraightOuttaCanadaEh

Interesting read on the G37 forum. Seems they also had problems with driveshafts vibrating after installing diff bushings.

https://www.myg37.com/forums/engine-...ushings-2.html

Not understanding the solution fully though as I let my mechanic do all the work. They mention "flipping" the diff bushings fixed the issue.

Interesting. I'm thinking it's more pinion angle correction, in their case. I don't think typical poly bushings for twins change the angle that much. Could be just problematic angularity in any case, that the stock shaft compensates for.

[Turdinator]

Originally Posted by Grady

What max speed?

I have one that may be a culprit of a harmonic vibration at around 130. Talked with Verus on it and with my gearing it was balanced at a speed of 165 mph. Have not worried about it, all the tracks I drive on 110 is about the max speed.

~170km/h

[VerusEric]

Originally Posted by dragoontwo

@VerusEric Can you give any information on why you transitioned to CV joint on the driveshaft?

The strength of the unit is dramatically increased with the revisions.

[billstock67]

Received this from Verus today:
"We do not plan to bring these back into production once this last allotment we have in stock is gone. We will also not be redesigning them, so there is nothing we can do about the weight. If we figure out what the issue is, we will certainly let you know."

[VerusEric]

Originally Posted by billstock67

Received this from Verus today:
"We do not plan to bring these back into production once this last allotment we have in stock is gone. We will also not be redesigning them, so there is nothing we can do about the weight. If we figure out what the issue is, we will certainly let you know."

That is correct, we will no longer be producing them.

I believe your issue to be specific to your vehicle. I have personally not heard of a balance issue to date from our units, let alone two units back to back. Like others in this thread stated, it can be a variety of things.

Thanks,
Eric

[StraightOuttaCanadaEh]

I'm very curious about the diff bushing thing so I'll remove that and see if the vibration goes away