Madmax

Has anyone tried the Edelbrock aluminum large oval port marine heads for BBC yet? Just inquiring on any experiences with them. Dennis Moore had an article on them a while back, and I haven't heard anything about them since. Are these what Mercury uses on their 525 motor? I'm debating putting them on a modified 330hp, but not sure if they are going to gain me much over my existing large oval port heads.

Thanks.!

floatingphil

If you check Teague On Tech in Powerboat Magazine, he recommended them, along with other mods, for the 7.4.

http://www.powerboatmagazine.com/teague/index.php

formula31

Ive been thinking about them for the future when I can afford them. I think they have a 110 cc combustion chamber which will up the compression and the weight savings should be considerable but I also wonder if they will do much for a 454 on steroids.

turbo2256

I used them on my boat. Had them ported to flow about 280/290
at .550 lift. Put them on a stock 7.4 short block, stock cam. Ran them with 3 different intakes. All with a 750 Holley double pumper. They worked great. Tried an Air Gap, Torker II and Performer RPM. The Torker II worked the best. If I had had a chance to change the cam there would have been a tremendous increase.

liquid lounge

I've got a pair...big improvement over the stock rect. port heads...intake volume [290cc] is about perfect for a 500-525hp big block...these heads are also a very good value...make sure the springs that come with them a compatable w/ your cam or vice versa. They come with inconel valves and are hard coat anodized and the 112cc chamber [or 100cc] is perfect for a bolt on on respective merc engines...like I said, big bang for the buck.