Help spec'ing out a new small block

MOPARMAGA said
In theory most of the air fuel mix is going to the high speed side of the valve which is heading to the most unshrowded area in the middle of the cylinder, but at low speed, which this engine probably won't see too much of it could shroud a bit.

Right! Low lift is over the short side. Where this is depends on the head design.

-Boosted- said
So in theory, it’s a non-issue?

To a degree, IMO, yes because valve shrouding isn’t good for the A/F mix and burning of it but I wouldn’t get caught up in it a ton. As the saying goes, the LS guys aren’t concerned with it.

For sure an improvement can be made by avoiding it.

273 said
depends where the intake valve sits in the bore, from what I hear at .200-.250" the wall no longer shrouds the valve.

I think a case can be made for more or less of which I don’t know any specific figures for this. For certain more clearance the better. But where does it hurt and where does it become a detriment?

I think this will depend on more things than a short list provides.