TheGrimSpeed
Member
Its been a while, i ended up picking up a spare head 1969 year, what tools would i need to port i do not have an air compressor. Thank you
Turbo charger? that might be out of my price range
-Steve
First of all, what's your goals?Its been a while, i ended up picking up a spare head 1969 year, what tools would i need to port i do not have an air compressor. Thank you
How much do you have to spend?
For priority in doing work on a slant six head, in order of biggest bang for the buck
1) have the head milled to raise the compression. Measure the piston recession, cc the chambers and use an online calculator to get the static compression to 8.5 to 1 for a stock engine.
Machine shop cost, estimated 75.00 + gaskets
2) to do a little more while the head is off, remove the valve springs and install new valve seals. Have the existing stock valves re ground and have the machine shop do a good multi angle valve job and clean up the valve pocket.
Estimated cost $150.00
3) got a little more to spend, get a set of OS valves from Hughes and have the machine shop cut the seats for the new valves, install new valve guides, clean up the valve pocket, oversized valves probably 80.00 machine shop work probably another 300.00
improving the flow at the valve seat is where you need to start.
Working in the port arms or port bowl before improving the seat is wrong.
For a stock or nearly stock build the stock size slant valves are fine, they need a good performance seat profile.
Thanks for all the replys, i want to gain some more mid range top end, the cheapest way possible.First of all, what's your goals?
Do you have the part number of the bit you used?i used a 3 inch carbide bit off amazon cost under 20 bucks, i didnt use a compressor i used a electric hand drill with the drill bit, it takes time with a electric bit, dont go to crazy just clean it up, by meaning clean it up you ll see once your in there casting flaws etc. Good Luck
Get you one of these bits on ebay.Thanks for all the replys, i want to gain some more mid range top end, the cheapest way possible.
Get you one of these bits on ebay.
SG3L6 Exhaust Cylinder Head Engine Exhaust Porting Tool Tungsten Carbide Bur NEW | eBay
They're cheap and can accomplish most everything you're after. Just smooth all the casting flaws and the valve guide bosses. Dont get greedy. As said you can use an electric drill or you can use a pneumatic or electric die grinder with a 1/4" collet.
You know it's funny, I never knew that about the course vs fine burs and I never noticed in the ad it even says "for softer cast material." I've been burning away with this bit for awhile with great results and minimal wear. Maybe cause I keep my grinding speeds slow and remove minimal amounts of material.Just be aware that the " fine" burrs are for steel.
The "coarse" burrs are for aluminum.
Either " will work" on either material but steel will kill the coarse ones rather quickly.
Since you have never used these, just go easy. They will remove a lot of material in a hurry if you just start hogging in.