Discussion
Do you mean 'gas flow it?
If you do then you'll need a big compressor and a die grinder, plus lots of small grinding stones of different sizes and shapes. A dirty and slow job.
It normally takes me about 12 hours labour to port, re-shape the combustion chambers, measure to ensure equality of volume, lightly polish and fit new valve guides and ream them. Then the valve seats must be re-cut and the new valves lapped in.
If you are going to fit bigger valves, before porting you must get the valve throats roughly machined out to the inside diameter of the valve seat for a depth of about 1/2" into the throat. Then you blend the new bigger diameter into the flowed port.
It probably sounds more difficult than it really is, but then i've done lots, so maybe I make light of it.
I hope this helps,
Peter
If you do then you'll need a big compressor and a die grinder, plus lots of small grinding stones of different sizes and shapes. A dirty and slow job.
It normally takes me about 12 hours labour to port, re-shape the combustion chambers, measure to ensure equality of volume, lightly polish and fit new valve guides and ream them. Then the valve seats must be re-cut and the new valves lapped in.
If you are going to fit bigger valves, before porting you must get the valve throats roughly machined out to the inside diameter of the valve seat for a depth of about 1/2" into the throat. Then you blend the new bigger diameter into the flowed port.
It probably sounds more difficult than it really is, but then i've done lots, so maybe I make light of it.
I hope this helps,
Peter
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