Angus Bruce Posted May 1, 2020 Report Share Posted May 1, 2020 Can anyone direct me to information on MM prefix engines. My PI tr6 has an MM44873HEA number. I am trying to get information on this engine. Quote Link to post Share on other sites
dave-lewis Posted May 1, 2020 Report Share Posted May 1, 2020 (edited) Hi, I believe it is off a 2.5pi saloon car. Kind Regards, Dave from a sunny hot and still locked down country. Edited May 1, 2020 by dave-lewis Quote Link to post Share on other sites
Nigel Triumph Posted May 1, 2020 Report Share Posted May 1, 2020 MM is a 2500 saloon/estate engine number, from a 2500TC or S. It's a carburetor engine with twin SU HS6s. Any idea whether your engine has been tuned, or built to TR spec? This engine in standard form makes about 105 bhp and is easy to tune for a reliable 140 bhp. More info on engine numbers can be found here: https://www.canleyclassics.com/?archive=engine-number-identification-chart Nigel Quote Link to post Share on other sites
Angus Bruce Posted May 1, 2020 Author Report Share Posted May 1, 2020 Thanks. Yes I believe the engine was built for the car. I have limited info on it but it's PI, and was told it had the following, tr5 cam, roller rockers, stage 2 head, ported and gas flowed, electronic ignition, cooling fan deleted( thermo fan installed) and what looks like a fairly decent set of stainless extracts into single stainless exhaust of a large diameter. The fuel pump in the boot is listed as mid 70's porsche 911 by the numbers on it? Quote Link to post Share on other sites
Nigel Triumph Posted May 1, 2020 Report Share Posted May 1, 2020 Sounds like a good specification. I should have spotted the PI metering unit in your photo! Nigel Quote Link to post Share on other sites
StephanfromAustria Posted September 5, 2023 Report Share Posted September 5, 2023 Hello, I have an engine in my TR6 without a number, I need to push in a number for Austrian goverment so I get numberplates, I have an US model from 1975 Juli, what Prefix was at this time? Can anybody help me? greetings Stephan Quote Link to post Share on other sites
RobH Posted September 5, 2023 Report Share Posted September 5, 2023 Welcome to the forums Stephan You could purchase a heritage certificate from the British Motor Museum. That would tell you the engine number from when the car was built. Of course the engine may have been changed since then........ https://www.britishmotormuseum.co.uk/archive/heritage-certificates Quote Link to post Share on other sites
Mike C Posted September 5, 2023 Report Share Posted September 5, 2023 You plan to add your own set of numbers to the block with a set of number punches? Quote Link to post Share on other sites
StephanfromAustria Posted September 5, 2023 Report Share Posted September 5, 2023 2 hours ago, RobH said: Welcome to the forums Stephan You could purchase a heritage certificate from the British Motor Museum. That would tell you the engine number from when the car was built. Of course the engine may have been changed since then........ https://www.britishmotormuseum.co.uk/archive/heritage-certificates I will try that, thank you! Quote Link to post Share on other sites
StephanfromAustria Posted September 5, 2023 Report Share Posted September 5, 2023 2 hours ago, Mike C said: You plan to add your own set of numbers to the block with a set of number punches? yes, no other possibilitty to get numberplates Quote Link to post Share on other sites
StephanfromAustria Posted September 5, 2023 Report Share Posted September 5, 2023 2 hours ago, Mike C said: You plan to add your own set of numbers to the block with a set of number punches? yes, no other possibilitty to get numberplates Quote Link to post Share on other sites
StephanfromAustria Posted September 5, 2023 Report Share Posted September 5, 2023 Following the pics, my engine number should be CF +5digit number+UE can anybudy proof this in this Forum, which has TR6Us Version from 1975? Quote Link to post Share on other sites
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