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I'm no expert but I've been told the intake needs to be rough and the exhaust can be smooth almost to the point of polished. Also been told if you remove anything on the exhaust side to take it off the roof of the port. You can also remove material from the short side radius of the port. But without having a flow bench it's probably not worth the effort.
Yep. No need to mess with the ports. Just cleaning up the casting flaws and making the ports a uniform texture will help.
There is a whole world of port tuning if you want to go that way.
My suggestion was more of a "while you're there" improvement over stock. Like the grease nipples before.
Yeah, basically the failure by Star Wars standards of Solo has Disney rethinking all the Star Wars universe films. They will stick to running the Episodes and roll out the side films now and then, if ever at all.
Yeah, basically the failure by Star Wars standards of Solo has Disney rethinking all the Star Wars universe films. They will stick to running the Episodes and roll out the side films now and then, if ever at all.
I've spent hours f-ing with lapping valves only to watch them worse. I learned once the color is consistent, and they look good and polished, they are usually good to go. If it took too much effort, they ended up cupped and sat in the hole too much, and didn't seal (or got worse). I've also bought in cheap for a bunch of thumper dirt bikes with scorched heads and burnt valves, so my perspective is probably skewed
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