23-11-2018, 04:57 PM
(23-11-2018, 01:15 PM)JonE Wrote: Stuart - that wasn't what was found here, but certainly with my bits done with less scientific methodry. http://www.austinsevenfriends.co.uk/foru...sion+ratio
And I didn't have a late head, just the range of the different LC heads (and a new Ricardo with max possible volume).
Thanks for that heads up -no pun intended- I hadn't seen that thread. Presumably I must have been measuring a '35 head along with a '37 head to come up with the same chamber volume; of course either of the heads could have been an oddity despite being at the factory thickness. I think it would be necessary to measure a number of heads of each type to come up with a definitive answer on what the CR actually was for any particular version.