just wondering if anybody has had a vibration @ around 1500rpm. My car does it under load and while sitting. It most noticable on cold startup due to the fact that the high idle is right in that rpm range

 

Can you describe the vibration a little better maybe? All R's tend to vibrate at idle because of the high compression.

 

do you have a lightened flywheel?

 

not that i know of but the previous owner said he put an exedy stage 1 in so it's possible. the vibration happens at about 1500rpm weather the engine is loaded or not, and only last for about 200rpm. I guess it could be a balance issue with the flywheel