Valve seat angles (1 Viewer)

[azusa]

Rebuilding my head, 1fzfe 95 be specific, question about valve seat angles. According to the specification supposed to be 30° 45° 75°
Planning on higher compression probably around 10.5
Has anybody changed valve seat angles?
Has anybody done any air flow testing?
Anyone with experience your suggestions are welcomed!

 

[bhsdriller]

maybe @Fj80oregon

 

[Kernal]

Not an engine builder myself but here's a couple of discussions I've bookmarked:

Valve Seats: Will 50- or 55-degree Angles Work For Your Engine?

Very few race engines run a 45-degree valve seat anymore, but that doesn't mean a 50- or 55-degree seat works on the street.

www.enginelabs.com

 

[AussieHJCruza]

How are you getting the increased compression ratio?

 

[azusa]

How are you getting the increased compression ratio?

Pistons

 

[Fj80oregon]

Pistons

Elaborate please.