How rare is this?

[dlmrun2002]

More curious then anything. Buddy had this in his shop today. Looked like it was in good shape too.

dlm ny country

[Preyupy]

Not very rare, all 121 heads with 46mm intake and 38mm exhaust valves were marked 121Ti. They were not just used on the Ti and Tii models. It is much more unlikely to find a standard 121 head these days.

[dlmrun2002]

Good to know.. Many Thanks.

dlm ny country

[jgerock]

Not very rare, all 121 heads with 46mm intake and 38mm exhaust valves were marked 121Ti. They were not just used on the Ti and Tii models. It is much more unlikely to find a standard 121 head these days.

I have a 121TI head from a 1971 "regular" 2002 that has the smaller intake valves. I think there are some folks who think that just having one of these means it came from a 2002ti.

The 121 head from my 72tii engine has the 46mm x 38mm valves.

[Cameron]

It is much more unlikely to find a standard 121 head these days.

I've got a standard 121 head, 71 cast on my 71.. Is that really that rare? Never thought much of it.

[Mike Self]

my'69 (bought new) came with a "121ti" cylinder head and I'm not sure I've ever seen a US spec 2002 with a "just plain 121" head that was original to the car (check the casting date).

I didn't think there was any difference between a 121ti head and a 121 head; since compression ratios on an M10 are determined by piston height, it couldn't be that one is a higher CR than the other, and I think the valves are the same size--at least the parts book seems to indicate that.

Anyone have any thoughts--and do you have a US spec 02 with its original head marked as a "plain" 121?

Another 02 mystery...

cheers

mike

[ndog]

(nt)