Porting a type 4 head, Not much of a short side Options

[Shivers]

Because the port is almost straight, with little long side short side concerns, with what there is , do you find it necessary to slow the flow down on the “short side” to get good flow out of the valve. I was reading about something mepstein posted a picture of. Small divots, like a golf ball. So I’m going to do that on the long side, just wondering if there is any reason not to also do it on the short side. Thanks guy’s (IMG:style_emoticons/default/smile.gif)

[technicalninja]

Exh port is where the restriction lives IMO.

Doesn't look like there is a good fix for it...

Serious turn in a very short port.

A proper "fix" will end up looking like a 6-cylinder 911 port.

This would require new head castings.

"When you give a mouse a cookie"...

The little dimples actually HURT flow a little tiny bit. (unless they are on the backside of a curve).

https://www.youtube.com/watch?v=fcjaxC-e8oY&t=158s

What they do is to decrease/eliminate port wall wetting. This can be very important if fuel is in the intake charge.

So, carbs could work better with dimples. Port FI will not.