Hatchers,
I've got a spail fan that we have used on M8's and M1000's it fits under the intercooler and draws the air thru the intercooler or you can push the air up and put a vent in the bulkhead right under the cooler. You can come by and take a look at the fans anytime. I 'll try to post a pic. Now after all that, I still think there is a power problem running any of the fans on a 2-stroke espescially if you have put a higher output fuel pump in the sled which I believe you have. All of the fans we have tested have caused the fuel pressure to misbehave. Maybe OVS has found the right fan but I haven't seen it yet. Good luck and call me if you want to look at the fan. Matt.