J.T

I've been looking to increase the HP of my S2000 for some time now. I will eventually go FI (most likely Comptech) and I don't want to buy anything that won't be comaptible with the supercharger.

Will the pulleys give me more HP? I've read threads where people have "felt" a difference, but are there any DYNOs or anything that prove any power increases?

...oh yeah, and will they be compatible with a suspercharger in the future?

Thanks
JT

Fongu

There is a minor performance change. These are not underdrive pulleys, so the losses to the water pump, AC and alternator are the same. The difference is a weight reduction of 1+ lbs of rotating mass. Since it is weight reduction there is definitely an improvement in acceleration, but it is not huge and probably not measurable on a dyno (few hp at most).

This is a similar mod as a lightened flywheel. A typical lightened flywheel is around a 8 lb weight reduction in engine speed rotating mass. So the pulleys have about 1/4 to 1/8 effect of a lightened flywheel.

Having them does make the engine feel more responsive and it is easier to rev match. Note that this type of weight reduction also decreases the engines "rotatational interia" so like a light flywheel it is easier to stall the car.

This is a minor tweak that is easy for a beginner to do (except for the damn alternator pulley). It is up to you to decide if it is worth the money.

Nobody

Are they compatible with the Comptech SC?

Fongu

Have no personal experience, but I would have to say yes it is compatible. Just as compatible as the stock pullies.

If I recall the aluminium pullies are the same dimensions as the originals. The only possible issue that comes to mind would be the strength of the pullies and the robustness of the supplied bearings. Quite honestly, can't see a supercharger stressing the parts enough to cause premature failure.

This is only an opinion don't blame me if the aluminium starts flying.

xviper

The Comptech S/C (or the Vortech for that matter), is driven by an "add-on" pulley to the engine's crank pulley (which is replaced by the S/C kit). The pulleys that are in Rick's kit are still driven the same way as with no S/C. The S/C has no link to those other pulleys.
The only thing is that if you are getting them mainly for looks, adding the next gen "intercooled" Comptech will hide those pulleys from site.