Supercharged S52 issues

[m3f_pbonsalb]

Someone else tried a delrin guibo. He removed it. Poly would be OK, but nothing more than stock M3 is required. I have had over 400 rwhp for the last 6 years, with over 500 rwhp and over 500 lbs rwtq the last 2 years and no issues with the stock guibo. They just require replacement roughly every 10+ years.

[m3f_hencini]

Someone else tried a delrin guibo. He removed it. Poly would be OK, but nothing more than stock M3 is required. I have had over 400 rwhp for the last 6 years, with over 500 rwhp and over 500 lbs rwtq the last 2 years and no issues with the stock guibo. They just require replacement roughly every 10+ years.

[m3f_pbonsalb]

Revshift makes a poly guibo with a metal frame. If someone gave me one, I would try it, but I have no present plans to buy one.

[m3f_enderw88]

Revshift makes a poly guibo with a metal frame. If someone gave me one, I would try it, but I have no present plans to buy one.

I just can't imagine what advantage a really hard giubo would have. The whole point is to allow slight misalignment and do a small amount of driveline vibration damping. Designs that don't use flex discs use U-joints. Limiting the ability of the flex disc to handle misalignment (by making it of stiffer material) seems like it would dramatically shorten the life of the output bearing on the transmission, increase the drive line power pulses in the driveshaft, and beat up on your diff all for absolutely zero performance gain.

[m3f_hencini]

Again, I just don't see the point. If the factory wanted a harder mount there, they would have done it. If you're because racecar, great, but for a street car, you're just shortening bearing life, increasing vibration, or in the case of the solid lollipops, destroying your undercarriage.

[m3f_enderw88]

Again, I just don't see the point. If the factory wanted a harder mount there, they would have done it. If you're because racecar, great, but for a street car, you're just shortening bearing life, increasing vibration, or in the case of the solid lollipops, destroying your undercarriage.

Even for racecar I can't see this...I could make an argument that at the limit the additional power pulses coming through the drivetrain could upset your tires. I see all sort of silly arguments like that over on the racerboy forums. If you are Ayrton Senna reincarnate you can talk about the cars behavior at the limits like that, but for the rest of us, these mods add no actual performance benefit. But they do stimulate the economy, so ROCK ON!!!

[m3f_pbonsalb]

I just can't imagine what advantage a really hard giubo would have. The whole point is to allow slight misalignment and do a small amount of driveline vibration damping. Designs that don't use flex discs use U-joints. Limiting the ability of the flex disc to handle misalignment (by making it of stiffer material) seems like it would dramatically shorten the life of the output bearing on the transmission, increase the drive line power pulses in the driveshaft, and beat up on your diff all for absolutely zero performance gain.

BMW makes a metal case guibo for some cars, but the little rings within it are rubber rather than poly. Should still have less flex than a full rubber guibo. BMW obviously did this for a reason, though I don't know the reason or why it is only on some late models.