MG
The Classic Marque

You and me both, Mr G

Totally.
Lost.


Help me out here fellas.

My granddaughters used to get awarded dojis at school for good spelling and maths tests. And for rounding up spiders in the classroom as everyone else, including teacher, was scared of them. 😂

Lol.

I've done a bit more reading over lunch. AC Dodd says he uses 1275 valves in all his small bore heads. As you suggest Willy, he turns down the exhausts to fit. As I have a lathe that will be a lot less trouble than fiddling with mixed valve lengths. So I will have 1 1/16" exhausts and 1 5/16" inlets.

I also read that the CAM4810 casting is in some ways better than the revered 12G295, as it ...

Thought you'd bought an MX5 for a minute 🤣🤣

diameters, yes.
Was meaning just leave the short 1 1/16" valve that you already have, then use .100" lash caps to get them up to close to the length of the 1275 inlet. I think it's about .120" difference in the lengths--Just thinking of the easiest/cheapest way of getting a result, but I guess it's starting to get a bit messy like that
Might be better just spinning a tiddle off the dia of ...

Willie, when you say standard for the exhaust do you mean one inch? That would mean going down to a small bore valve (short), combined with a big bore inlet (long). I haven't heard of anyone doing that.

I assume your ratio is based on diameters not areas.

Spot the Doji. 😁 😉

https://youtu.be/nGy9uomagO4?feature=shared

Stainless do , we were on titanium inlets and inconel exhausts. Inconel is heavier than stainless but stronger so the valves could be machined way thinner for good flow without sacrificing strength on that side-

With the heads Les has I'd go the 1275 inlet and for the exhaust, leave it std. but with the grinding concentrate on getting good flow shape after the valve seat and around the val...