Not blonde enough to be Blunt lol,
If the valve job is done properly and concentric, no lapping should be needed. If you are in a pinch to get a car running, it works fine.
Not all machine shops are bad, but if they are rebuilding cars to get back on the road, they aren't normally doing things to be top-performing. Go to a real race shop with proven results is all.
When doing my valve jobs, I put Dykum on the valves and turn them on the seat to ensure the contact patches are where they should be. Putting the gritty paste, and grinding them together is actually bad from a performance standpoint.
Originally posted by LowR3V'in
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Not all machine shops are bad, but if they are rebuilding cars to get back on the road, they aren't normally doing things to be top-performing. Go to a real race shop with proven results is all.
When doing my valve jobs, I put Dykum on the valves and turn them on the seat to ensure the contact patches are where they should be. Putting the gritty paste, and grinding them together is actually bad from a performance standpoint.
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