Mmm sorry Matt I was sure it was listed. I think the original cc of the chambers for a E88 efi head was about 42cc. So putting an L24E E88 head on an L28 will give a considerable Compression boost even with dished pistons.
Edit: I realise now that I was reading a post on ozdat that was talking about Nissan heads and the details were listed in the post. The chamber is described as being 42.4cc. There was also some discussion about some heads being less than this due to the heads being skimmed. From memory one was as low as 39cc. I'll see if I can find the post later..
Edited by CBR Jeff, 23 July 2016 - 07:33 AM.