Mark's 1G Winter Projects

[asshanson]

Wow that's awesome power. Curious why you had vibration issues with the one piece driveshaft, was it because of the angle? I don't know much about DS technology.

I've heard great things about the waterless coolant. Expensive, but nothing compared to the cost of a race car setup. I'm surprised it ran cool, most say it runs hotter on the street, but since it doesn't boil it actually takes more heat away from the motor at very high temps, which is great for the track.

[Mark Leasure]

Originally Posted by asshanson

Wow that's awesome power. Curious why you had vibration issues with the one piece driveshaft, was it because of the angle? I don't know much about DS technology.

I've heard great things about the waterless coolant. Expensive, but nothing compared to the cost of a race car setup. I'm surprised it ran cool, most say it runs hotter on the street, but since it doesn't boil it actually takes more heat away from the motor at very high temps, which is great for the track.

I'm no driveshaft expert either. I know a little bit about harmonics and the frequency domain from my engineering experiences.

The symptom I experienced was a bad vibration while slowing down between 105 to 100 mph. Otherwise no issues on acceleration. I spoke with an engineer at DSS and it doesn't violate critical speeds, but weird harmonics can happen when you have high durometer poly mounts on the engine and rear end, or if they are hard mounted.

Now it is silky smooth with 2 pieces.