Ever feel like someone is conspiring against you?
Sat outside 1/2 the day in a nice sunny lightly clouded sky with an airgrinder and some carbide burrs and stones and polished all of the combustion chambers to a nice shiny satiny finish.
Go pet the doggies, go inside to the a/c to cool down for a minute. Happen to look up for some reason and notice water running off the roof. Outside rain is pouring down monsoon like all over the head.
Bring head inside and within 20 min all the chambers were covered with rust. Sprayed and wiped down with Liquid Wrench (all I had on hand), and the paper towel comes away black and rusty. Surface now feels like about 400 grit sandpaper to the touch.
*sigh*
Also to those who want to port their heads. I started using a 22,000 rpm electric die grinder and it is not speed adustable. This is all but unusable. At that high an rpm the burr just wants to bounce around.
But since then I have gotten an air compressor.
Bought a cheapie air grinder that runs 20,000rpm at 90psi so i set regulator for 45psi and grinder worked fine.
Only use an electric grinder if you get a adjustable speed one. It seems the idea speed is about 10,000-12,000rpm. If you could find a Dremel that took 1/4" shanks that would work fine. I used carbide burrs to shape and stones to smooth out to a satiny finish.
Question to experts?
I had chambers to a smooth satiny finish. Do they need to be polished mirror smooth? I have a few felt wheels and some tripoli compound that I can use to polish the chambers with.
Someone said you dont want the chambers mirror smooth for the same reason you dont polish the intakes, that the fuel will fall out of suspension as air and fuel mix tumble and swirl into the chamber.
Sat outside 1/2 the day in a nice sunny lightly clouded sky with an airgrinder and some carbide burrs and stones and polished all of the combustion chambers to a nice shiny satiny finish.
Go pet the doggies, go inside to the a/c to cool down for a minute. Happen to look up for some reason and notice water running off the roof. Outside rain is pouring down monsoon like all over the head.
Bring head inside and within 20 min all the chambers were covered with rust. Sprayed and wiped down with Liquid Wrench (all I had on hand), and the paper towel comes away black and rusty. Surface now feels like about 400 grit sandpaper to the touch.
*sigh*
Also to those who want to port their heads. I started using a 22,000 rpm electric die grinder and it is not speed adustable. This is all but unusable. At that high an rpm the burr just wants to bounce around.
But since then I have gotten an air compressor.
Bought a cheapie air grinder that runs 20,000rpm at 90psi so i set regulator for 45psi and grinder worked fine.
Only use an electric grinder if you get a adjustable speed one. It seems the idea speed is about 10,000-12,000rpm. If you could find a Dremel that took 1/4" shanks that would work fine. I used carbide burrs to shape and stones to smooth out to a satiny finish.
Question to experts?
I had chambers to a smooth satiny finish. Do they need to be polished mirror smooth? I have a few felt wheels and some tripoli compound that I can use to polish the chambers with.
Someone said you dont want the chambers mirror smooth for the same reason you dont polish the intakes, that the fuel will fall out of suspension as air and fuel mix tumble and swirl into the chamber.
Where are you????
