Just got an A series 12g940 cylinder head, need some opinions on it....
Turbo Mini Forums

Just got what I thought was going to be a bog standard 12g940 off a friend which has been sat in his shed for years, in which I was going to modify for turbo use....
But that isn't what I received! It looks to me like its been rebuilt with bigger (read monsterously big) valves, possibly unleaded seat inserts, new stem seals and I don't think its had any porting work done though, although I cant be sure....
So, the Inlets measure a whopping 1.5"/ 37mm(ish) and the Exhausts around 1.3" / 33mm using an ancient caliper (non digital). The head thickness is 73.5mm / 2.9"

So, is this suitable for me to use? (After enlarging the chambers and a mild bit of porting if it needs any)

http://s770.photobucket.com/user/Carlzilla2010/library/Head

Edited by Carlzilla on 5th May, 2014.

throw those calipers away....

completly std head, ypou just cant measure for toffee LOL.

might be an mg head with 35mm valves

Looks like a standard head to me

Speeding is like masturbating, everyone does it, but not all of us film it and put it on the internet

[quote=fab,8th Oct, 2010]fuck off

How am i supposed to measure them? I'm doing it across the widest point of the face of the valve, and it looks like wherever the inlet valve has been fitted there's a bit machined from the chamber, I'll try and find pictures of my old 1275 head from when i had it off but I'm sure the valves were never that big

From the pictures it looks like a standard 33-29 valved head. There's certainly no way on earth there's a 37mm inlet & 33 exhaust in there. Ports & chambers look standard to.

Phil.

WWW.TURBO-MINI.COM

Cheers lads! I am happier knowing it hasn't been molested.