Adding Material To The Inlet Ports????
Posted: Fri Sep 28, 2012 9:22 pm
I've been looking to tidy up the ports in my 12 valve heads, but what I've noticed is that there isn't really a short side radius in the inlet port, where the port floor turns and meats the valve seat. It's more like a mitered corner. You can actually feel the back edge of the valve seat in 1 of the ports.
Another area of concern is the bowl area. It appears (measures with inside dividers) to be too big in some places.
So I'm considering adding some material to help me get good clean curves and keep cross sectional areas as consistent as possible.
Obviously TIG welding some aluminium into the ports would do this, but it's not practical for me to pay someone (IE: No coin for that) to do that.
I'm also not too keen on using epoxy (tho I have done something similar in my other car).
So I thought about using some of the aluminium brazing rods that are readily available.
Has anybody had any experience with aluminium brazing rods?
I figured I'd preheat the head(s) in the oven, but what would be an safe temperature to go to?
Thoughts and opinions, please.
Another area of concern is the bowl area. It appears (measures with inside dividers) to be too big in some places.
So I'm considering adding some material to help me get good clean curves and keep cross sectional areas as consistent as possible.
Obviously TIG welding some aluminium into the ports would do this, but it's not practical for me to pay someone (IE: No coin for that) to do that.
I'm also not too keen on using epoxy (tho I have done something similar in my other car).
So I thought about using some of the aluminium brazing rods that are readily available.
Has anybody had any experience with aluminium brazing rods?
I figured I'd preheat the head(s) in the oven, but what would be an safe temperature to go to?
Thoughts and opinions, please.