Is this head skimmed or not?

Post by **sowden** » Thu Jan 01, 2009 9:48 pm

Hi all,

bought a couple of engines to play with (1098 & 948) and guess what...the 1098 had a 12g295 on it...heh-hay!

Can anyone tell me from the picture posted whether or not it has been skimmed yet? It looks like someone has polished it but as I dont know what an unskimmed one looks like, I dont know if the key step has been taken!

Cheers,

Russ

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Post by **les** » Thu Jan 01, 2009 9:58 pm

They shouldn't look different, just thinner! Pretty sure standard is 2.75''

Post by **sowden** » Thu Jan 01, 2009 10:02 pm

the one pictured reads 2.68" on my micrometer

Post by **les** » Thu Jan 01, 2009 10:14 pm

0.70thou removed by my calculation, I think it's normally a 0.60 skim?

Post by **Peetee** » Thu Jan 01, 2009 10:50 pm

the one pictured reads 2.68" on my micrometer

Confirms my draftsmans eye. Certainly looks like the thinner of the two 295 heads I have.

Post by **sowden** » Thu Jan 01, 2009 10:58 pm

guys,

sounds like this is skimmed already then? (please say yes!!)

If so, that is a gift from God, because my 12g940 is nearly ready to trial-fit; if it doesnt work, the above head can go straight on and I dont have to refit my 12g202! (progress is good!

).

Post by **bmcecosse** » Fri Jan 02, 2009 12:05 pm

Yes - all heads 2.75 as standard - so yours has been skimmed. Confirmed by the view across the head - where the little 'tongue' at the edge of the head is flat with the main face - on an unskimmed head it lies above the main surface. The chambers have been lightly cleaned up - the valves look to be a bit 'pocketed' - but it will be a fine head, although not as good as a 940!