Jwconeil

Vervish

iTrader: (4)

Don't think the difference is weight is material..

Found this in another thread from a CF driveshaft manufacturer:

"just to be clear it will not be much lighter but what you will notice is allot
you see cars with Guibo's and a hanger have allot of movement before the car moves. when you step on the gas
the front Guibo twists, then the torque moves down the 1st shaft and then the hanger bearing rubber moves up
about .600 to .700 then down the back shaft to the back Guibo and more twist. only after all of this will the car move
with the Carbon shaft (or aluminum) there will be direct movement, the car will feel more athletic or connected to
the gas pedal. its a very noticeable thing.

Jwconeil

lobuxracer

iTrader: (2)

You only gain WHP on an inertia measuring dyno. This would never happen on a load cell dyno because losing weight isn't gaining power, only reducing rotational inertia. A Dyno Dynamics unit is insensitive to weight changes as it should be if you want to measure power changes.

tred

https://www.sikky.com/product/lexus-isf-driveshaft/

Wow I had no idea this was even an option.
I would also like to know the weight difference and to see if its worth the money.

Jwconeil

SCORP69

good luck wasting money unless you need a new DS and it cost less than OEM.

Jwconeil

Alizia

iTrader: (1)

who are you to tell people how to spend their own money?

so back on topic, I'm also quite curious of the potential gains of the CF shaft as all of the other go-to mods for mine are already done

even if the gains are minimal I'd still say they are worth it as from what I know it's not a labor intensive install

sleepstate

iTrader: (3)

Search is nice...

https://www.clublexus.com/forums/is-...riveshaft.html

https://www.clublexus.com/forums/is-...riveshaft.html

There is no weight difference between OEM shaft and the CF shaft on ISF (as stated multiple times from people with DSS shafts for this car)

Jwconeil

I extensively read those, and believe all of the posts on weight were related to the prototype. Nobody has actually weighed anything except the prototype.

feel free to post information that proves me wrong. I’m willing to bet you can’t find it.... I have looked thoroughly.

sleepstate

iTrader: (3)

Call Sikky then, they sell them.
Claim their DS is 19lbs, I am sure they can tell you the OEM weight.

https://www.sikky.com/product/lexus-isf-driveshaft/

Jwconeil

I love it when people join a thread, tell people to use search, and literally do not even read the threads that they post as definitive answers.

per one of the very threads that you stated contained answers (that they didn’t), I can be quoted as saying...

“I just spoke to Sikky. Their unit is made by the driveshaft shop. He did not have weights on hand, but he said he moves boxes around and the carbon unit feels like it weighs half of what the aluminum unit weighs. He said build time is 4 weeks. I may take the plunge and weigh them for the community, but I currently have nowhere to install it. I’ll report back if I can use a buddy’s garage in the short term.

My 60 foots and quarters are wildly inconsistent. I’d like to run more consistent times. Hopefully this will solve that.”

Since then, Sikky e-mailed me and said the Carbon and aluminum driveshafts weigh the same, at around 25 pounds. This is where my confusion comes in. I HIGHLY DOUBT a stock driveshaft is 25 pounds.

Before you tell me to do more homework and call DSS, I did. They have no idea what it weighs. Neither company know what the stock drive shaft weighs.

If you can answer the extremely specific question originally posted, please do. It was posted because in depth research could not yield the needed data.

sleepstate

iTrader: (3)

Glad I could help. I'll go pull my driveshaft this weekend and weigh it.

Alizia

iTrader: (1)

any updates on this? I'm quite curious