How do all,
Anyone had a go at doing their own Port & polish? if so, any tips? I'm thinking of doing some port matching for the exhaust manifold.
Get yourself a good die grinder, bull nose tungsten carbide bit (or two), a couple of grinding stones and a coupel or small flap wheels.
Just take off and casting marks. You can use the inlet and exhaust manifold gaskets as templates, as to how much metal to remove. Use a permanent marker pen to mark the area.
You want to make the openings as uniform as possible and remove anything that looks like it could be an obstruction.
As mentioned above, when matching the exhaust manifold, leave a lip so, the heat outlet is smaller than the exhaust manifold runner inlet. This will help prevent an gas coming back into the head.
Have a look to see if you can smooth out the throttle body at all. I've not seen that area mentioned much on here but, it will often have a fair size lip in it. Even reprofiling the butterfly valve might help things.
When you come to smooth things off, don't make them too smooth as, you'll create more friction. Just think about the surface of a golf ball. That dimpling effect is used to reduce air resistance and therefore the balls speed and distance through the air.
You could do a search on Google. The American's have lots of useful information on porting and polishing.
think that thread got deleted, mods probably worried someone would try it lol
