olds 455 question

[cncer691]

What is a good method to plug up the exhaust crossover ports on my heads? I have some plugs from edelbrock, but after about a month or so, they always loosen up and rattle around when at idle. There has got to be a better way

[bobz]

you have to weld them in.

[bobz]

you have to weld them in.

[GlastronGuy]

I had Mondello's fill mine.

[cncer691]

I just didn't want to take the heads off this close to summer. I am not an ace mechanic, so that would be a major ordeal for me to tear the engine down.

[jim lee]

Just put a tunnel ram on it. Tunnel rams don't have the crossovers in the casting.
-jim lee

[cncer691]

I love the look and the bragging rights of saying i have a tunnel ram, but if I put on a tunnel ram, then i have to re-design my interior. I would really hate to lose what little sun pad I have. I want the best of both worlds, fast boat and a littel room to move (when the boat is stopped)

[Q-ball]

What is the reason for plugging the crossovers? I have a Edelbrock Torker intake, should I plug mine?

[JEThro]

Here's my 2 cents worth. The exhaust crossover is basically a smog device. The heat the exhaust makes help warm up the carb faster so you won't run in a choke-on/rich condition for too long. On your early model choke thermostats,look at where the choke coil is mounted. I'm porting my third set of heads and will most likley have the exhaust passage on the heads filled. Its not cheap. When you fill your heads, you have to create and shape your own exhaust bowls below the valve seat. This gives you better flow with less turbulance. Jethro

[cncer691]

Q-Ball, Edelbrock recomends pluging the port on race and boat applications. I think it is because of the heat generated at high RPM or something. I really dont see how that is any different than a car on the highway. All I know is that my engine used to get very hot on top, and water would boil and spit when I would drip on it from swimming.

[mister460]

Take your intake off and flip it over. Get a cutting torch and a couple scrap SB Chev pistons (they're EVERYWHERE). Light torch and melt aluminum into crossover passage in manifold until it fills it up and blocks it off (don't hold piston in hand, it will be hot). Then file it smooth with the mating surface. Walla walla! Blocked off for about 20 bucks!

[Taylorman]

How about bolting on a pair of Edelbrock heads. They have no crossovers.
http://free.***boat.net/gallery/Gearhead_Garage/Motors_and_Drives/heads04.JPG
http://free.***boat.net/gallery/Gearhead_Garage/Motors_and_Drives/heads03.JPG
http://free.***boat.net/gallery/Gearhead_Garage/Motors_and_Drives/heads02.JPG
http://free.***boat.net/gallery/Gearhead_Garage/Motors_and_Drives/heads011.JPG

[Q-ball]

I found a nice guy (well another one I should say, thier everywear on this fourum) that is sending me a set of edelbrock plugs brand new for free. The guy did'nt even ask for shipping, it's cool to know thier are so many of you helpful boaters out thier!!

[Raskal]

hey taylor how much are the heads for the olds 455 just about to buy torker 2 intake might go all the way thanks http://free.***boat.net/ubb/smile.gif