Subaru Impreza GC8 & RS Forum & Community banner

PST carbon fiber driveshaft is in

2014 Views 9 Replies 7 Participants Last post by  TopElement
3
Finally got around to installing the PST carbon fiber driveshaft.

Much lighter than stock, and smoother shifts since it's one-piece and the rubber-mounted center support of the OEM two-piece is eliminated.

Slight hum at 85-90mph, so might try to rotate 180º on diff flange.

OEM driveshaft weighed 21.5lbs, carbon driveshaft weighed 14.4lbs. Over 30% weight saving!





See less See more
1 - 10 of 10 Posts
I found the drivability to be a night and day difference when I put mine in. Especially in stop and go traffic.
Thread revival ! How is it so far ? Any trouble during the install? Clearance issue?
Easy install, no clearance issues but it's close due to the larger diameter. Small vibration around 90mph which could be the driveshaft, and I haven't tried reclocking it.
I'd start with a 90 degree rotation and work your way around til the vibrations stop. What is the cost comparison between this and OE?
Not sure, would never consider replacing with two-piece steel stocker.
Do you have any bervore-vs-after 0-60 or 1/4 mile times. There should be measurable improvements made from 30% rotational inertia reduction.
  • Like
Reactions: 1
Do you have any bervore-vs-after 0-60 or 1/4 mile times. There should be measurable improvements made from 30% rotational inertia reduction.
This car is too slow to bother measuring! As a track car, my goal is to remove rubber/compliance wherever possible and shave pounds.
  • Like
Reactions: 1
1 - 10 of 10 Posts
Top