Multi-Angle Valve Job for High Performance

Smitty describes the aerodynamic benefits of multi-angle valve jobs, increasing airflow and therefore horsepower by simply "knockin' off some corners."

[crazyDIYguy]

I love that i found this channel, it's so hard to find people that actually know the logic behind performance. Thank you 🙏💯

[archimedesCNC]

David Vizard would be proud. nicely explained & these efforts are much appreciated.

[georgedreisch]

While you covered the 15 degree incremental changes in angle to maintain laminar flow over the valve seat and face, you didn’t mention that the 15 degree changes in angle function to provide vaporization ridges, to provide additional fuel - air atomization, and is why radius cuts are not typically used.
It’s always left me going huh?, for how much OEM’s leave on the table, for lack of attention to details, for gains in reduced emissions, increased mileage, as well as performance.

[jordanbuscema]

just got the multi angle job done looking forward to try it out

[ThirteenTwentyRepair]

That makes me wonder if the OEM “tumble” helps atomization in a stock application where they are more concerned with emissions than performance.

[jesseduke]

I like this! Is there more were this came from?

[jamesfontana]

Not to much back cut on exaust valve, it can cause inversion.

[tadeckel]

How about an interferance angle. 1 degree difference between valve sealing seat and seat? Get a better seal.

[Paul-bozu]

Interesting, I have always done the seat, doing the face can be very tricky

[w.e.s.]

What happened to this channel? It disappeared and it would of taken off