2.81 vs 3.1 pulley dyno runs

[sleepless]

I do quite a bit of open track driving and have been having the usual "running hot" issues. I started with a 2.81 pulley and backed down to a 2.94 (no dyno) and now a 3.1 pulley.

I'm adding the Evans oil cooling kit in a week so hope to put back either the 2.94 or 2.81 eventually with the better cooling system.

Anyway, figured some of you might be interested in the dyno runs.

Enjoy!

 

[HISSMAN]

For open track events I would recommend the stock size pulley. The heat generated by the eaton when you over spin it will make a smaller pulley ineffective IMO. Or go with a Twin Screw at it's lowest boost level.

Good numbers though.

 

[sleepless]

I use a data logger and can see higher accel g's consistently with the 2.81 vs the 2.94. So, based on my data, the 2.81 is definitely providing more power throughout a 30 minute lapping session.