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Norton47

Jedi Warrior
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I pulled the bonnet on the Spit tonight getting ready to pull the engine and trans out. I then pulled the seats. No rust through under the seats. Plenty of surface rust/dust but nothing through.
I then was re-reading some of the
Spitfire and GT6 magazine information I had printed and decided to verify the new engine block number. I only really paid enough attention to ensure it was a Triumph block and not an MG.
The number was FM5973UE and if I read the data sheets correctly this indicates that it is a 1976 block and not a 1973 as the reciept indicated. The way the data sheet reads this is also a 9:1 compression engine.
Am I interpreting this all correctly?
If so, guess that's not all bad!
 

eejay56

Jedi Warrior
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Yep, the 76 was the only year the US 1500 had 9:1 compression ratio. Nice. That got me curious so I went at checked the engine I pulled out of Piece O Spit to use in Speed Racer and it's FK1074HE it seems to be a high compression 1300 from a Mark IV.
 

Andrew Mace

Moderator
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Norton47 said:
...only really paid enough attention to ensure it was a Triumph block and not an MG.
The number was FM5973UE and if I read the data sheets correctly this indicates that it is a 1976 block and not a 1973 as the reciept indicated....
Check that data again. If you typed correctly, a four-digit "FM" engine number probably would be circa 1973.
 
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