I checked the cc's on my vortecs and they came to 64cc.. right on the money..

Hey Tom,

Sorry to hear it's not working out. My .02:

You're close so stick with the 383. It should be a nice engine for the boat you've got, and the alpha will hold up fine if you take care of it.

It looks like all your design choices are oriented towards max performance. Start thinking reliability first performance second.

1. Change the pistons to get your compression down.
2. Change your cam to one of the Comp XM cams (or similar). I know you've worked over the heads so you might want to go roller cam to maximize hp.
3. Make sure your exhaust will support your choices above.

Now the only question is how much $$$$$$.

Open up the chambers?
 

Tom,
Just a thought here. Maybe you could take the heads to someone really sharp on airflow and convince them to grind out some of the combustion chamber and bring the volume up to 70 cc's or so. Who knows, it may even increase the flow of the heads by unshrouding the intake and exhaust valves. By now there must be some circle (automotive) track guys that know quite a bit about the Vortech combustion chambers. The first place I would check would be Brzezinski Racing @ wwwcastheads.com You could also check with Joe Mondello, he was interested in the Vortech heads and possibly a magazine article on them the last time I talked to him.
Sincerely
Dennis Moore
FAMILY AND PERFORMANCE BOATING MAGAZINE

Welcome Dennis. Tom and I built similar engines, except his is a 383 and mine are 409's, based on alot of the info that you give in your books. Thanks for the help.

Jeff