Port Misalignment, Solutions?

BBShark

BBShark

Garage Monkey
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I have a pretty severe port misalignment on one head. The other side looks good. The black line was drawn on the head with the manifold bolted in place and .06 shims (for gasket thickness).

The mismatch is about .15 max horizontally and .20 max vertically. I could probably re-position the ports on the intake but I'm guessing I would have to do that with epoxy. That scares me but I understand that it is fairly common.

Any ideas?

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It looks like they're not all the same mis-match too. I've heard about guys matching the intake ports to the gaskets- often enough it seems to be a common thing. In lieu of that, maybe just grinding a radius on the head into the ports where your lines are drawn?
 
Your right, the port is aligned (but high) on the rear cylinder and then gets worse vertically as you go to the front.
 
If you shim the intake up in the front can you get it all close? Maybe the intake casting is twisted or something.
 
Edelbrock heads and GM Ramjet 502 intake. The alignment issue is mostly with the intake. The heads look dimensionally consistent.
 
Did you check against a gasket? How does a gasket mate up with the heads and how with the intake That should give a good idea wether the problem is the head or the intake.
 
It's definatly the intake. The ports in both heads are centered on a gasket. The Ramjet intake ports are shifted on the #1 and #3 ports.

Anyone epoxy an intake to port match?
 
Yes, drill holes so you have an "anchor" for the epoxy and rough up the area where the epoxy needs to bond, then rework the ports. I wonder if all those ramjet manifolds are like that.
 
That looks way off. ok, really stupid question....are you sure you're not holing the gasket the wrong way? Flip it 180*? I know I know, but I've done plenty of stupid things in my time. Something I would do.
 
The lines I drew on the heads are from the intake ports. The heads are definitely OK, both sides match. Both sides of the Ramjet manifold do not however. The intake has 4 individual sets of cores that make the ports (when casting). The cores for the casting must not have been placed properly on that side.

Luckily the ports on the Ramjet are bigger than the head ports so I can epoxy the intake ports to get a perfect match without having to port the heads.

This really pisses me off because I had another RJ intake that matched perfectly and I sold it to a local guy that needed one and bought another. Now this one is dicked and my engine is together!
 
No returns. The intake has been modified, ported to the plenum, welded and machined.
 
BBShark said:
No returns. The intake has been modified, ported to the plenum, welded and machined.
Click to expand...

:tomato: Shit, WHY does this whole scenario sound so familiar, like a Shakespeare play.....

maybe not the same item, it's the damn sequence of events....

:gurney::confused::drink:
 
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