ryanborder Posted May 17, 2016 Report Share Posted May 17, 2016 I have a question about my TR6 engine number. It is: CC25007HE I am by no means an expert on these numbers, but there are a couple of things that seem confusing. First is the number: 25007 It appears that the engine numbers roughly - though not exactly - correspond with the commission numbers. If 25007 was a commission number, I think it would be a VERY early car... like the #7 TR6 ever produced. Does that mean my engine is a VERY early engine? Also, the number starts with CC, and ends in HE. If I understand correctly, CC means it was a carburated engine. HE means it was a high compression engine, which implies a fuel injected motor for a market outside the united states. What gives? I haven't come across a CC-HE engine before; but that doesn't mean they are uncommon... but are they? Could/would this have something to do with the engine number and early production? The engine is currently in the US, in a (my) 1974 TR6. Commission #CF15425U. Thanks- Ryan Border. Quote Link to post Share on other sites
saffrontr Posted May 17, 2016 Report Share Posted May 17, 2016 Ryan, Your engine was originally fitted to a 1969 TR6, CC25064LO, when built by the factory. All 1969 TR6 engines had an HE suffix both PI and carb however whilst HE would appear to designate a high compression engine that wasn't the case for the CC....HE engines which had a compression ratio of 8.5:1 compared with the CP....HE engines which were 9.5:1. The factory did drop the compression ration on later CC engines to 7.75:1. cheers Derek Quote Link to post Share on other sites
ryanborder Posted May 17, 2016 Author Report Share Posted May 17, 2016 Ryan, Your engine was originally fitted to a 1969 TR6, CC25064LO, when built by the factory. All 1969 TR6 engines had an HE suffix both PI and carb however whilst HE would appear to designate a high compression engine that wasn't the case for the CC....HE engines which had a compression ratio of 8.5:1 compared with the CP....HE engines which were 9.5:1. The factory did drop the compression ration on later CC engines to 7.75:1. cheers Derek Thank you so much for the info Derek ! Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.