Ported vs stock airhorn
 

Its winter so time for boring posts

I was surprised at some of the difference in widths in some areas....notice the lip is radiused/blended in AC bump is reduced significantly

http://i134.photobucket.com/albums/q...f/DSCN6196.jpg

Re: Ported vs stock airhorn
 

So Lee, there was enough metal there to take out and not punch through that air channel?

Re: Ported vs stock airhorn
 

Yes, plenty.....still a lot left

Re: Ported vs stock airhorn
 

Aside from opening it up to accommodate say 63mm throttle plates, I think simply grinding out the horn a bit could be stopping short of what might be the better approach, i.e., something like the venturi horns on the Webber carbs maybe???

http://i185.photobucket.com/albums/x...ps255babf6.jpg

Something I've been thinking about for a while now...

http://i185.photobucket.com/albums/x...pt11-12-11.jpg

I like the sound of a "cammed" motor too. BUT, I like the surprise factor especially. Whatever pumps up the performance w/o tipping anyone off...heh, heh, heh.... :dancing