Metro engine

[Pez]

I have a new 1275 engine for fit in my Mini.

I think is a Metro one but I don't know exactly what is.

The engine number is 12H CO4AA 100733.

Can somebody tell me bhp, compresion ratio,etc of this engine.


Thanks for your help

[turbodave]

www.manchester-minis.cwc.net/technical.htm
or more accurately:
www.manchester-minis.cwc.net/technical/standard_engine_types.htm

I'd take a guess it is 62hp or therabouts, leaded, and a 9.75:1 CR with 33/29 valves.

[Pez]

Thanks for the information.

There are somebody who had increased the compresion ratio to 10:5.

Is it Safe??????

[phil hill]

Err, yes, and yes !! But the real question is Why ??

[Pez]

I supose the big difference between the 62bhp engine and 72bhp one is compresion ratio.

I want to have about 80 bhp in my mini.

To get this I have a 270PipperCar, A maniflow LCB and a Weber carb with manifold.

My knowledge of the A-series is limited, but I think that is possible.

Isn't it?

[turbodave]

The 72hp metros had larger inlet valves, a 'mild road' camshaft, different advance curve, higher CR, much better manifolding, and (i think) a better airfilter case.

[Pez]

I'm little desappointed.

I will assemble the engine and tell you the result.



>> Edited by Pez on Tuesday 23 March 21:30

>> Edited by Pez on Tuesday 23 March 21:31

[Paul V]

My MG metro engine made 80 bhp with just a LCB and K&N filter when put on the rollers, went bang that evening though

[Pez]

It's a pity