bored 80 over

around 1 more than stock ... so id say around 17-18 rwhp if its tuned in and airbox lid is removed
 
If it blew because it got hot, then you should really do a plug check and make sure its not running lean. Removing the airbox lid will cause it to run a little lean also, so jet accordingly
 
its actually a fairly simple formula but for me its a side function on my porting program so it makes it easy for me