Competition valve face interference

[Wyomingcowboy]

This is for all you motor heads out there who know a heck of alot more than me: Is there a specified interference angle that we need to grind our valves to? AllData mentions nothing about valve angles and gives only seat angles.

Anyone?

 

[Bob4x4]

CYLINDER HEAD

Overall Flatness End to End (Max. ) 0. 30 mm (0. 012 in. )

Overall Flatness Side to Side (Max. ) 0. 076 mm (0. 003 in. )

Intake Valve Seat Angle 30°

Exhaust Valve Seat Angle 45°

Valve Seat Width

(Min. ) 1. 49 mm (0. 059 in. )

(Max. ) 1. 80 mm (0. 071 in. )

Valve Margin (Min. ) 0. 72 mm (0. 031 in. )



IRRC for the 12 v they listed a very small diff maybe 1-2 degrees it's been a while... ... ... ...

 

[Wyomingcowboy]

Thank you!

BTW, what does IRRC, and IIRC mean anyway?

 

[Wyomingcowboy]

If I Remember Correctly?