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[-OTTO-]

Hello all

I pleased to buy a motor with the number 151 123 907

the dealer said to me its a 8:1 compression
Am i wrong?
i thought all the time these motors are 7:1 compression

Thanks for brining light in my brain

[Wittsend]

Yes,
But a previous owner could have done anything

[-OTTO-]

Thanks

so i have to look if there are
rightangular cast


kind regards

[Formerlyjeremy]

The compression ratio may be lower for export vehicles - it'll depend on the quality of fuel likely to be available, if in doubt supply low compression vehicles.

[agg221]

The compression ratio may be lower for export vehicles - it'll depend on the quality of fuel likely to be available, if in doubt supply low compression vehicles.

That would be if the head had been changed. The alternative is that the head could have been skimmed down to increase compression. No easy way to check this without taking it apart 

Alec

[Wittsend]

The only way to be sure what you have is to measure the height of the head.

There is a recent topic on 9:1 compression heads and some head heights given.

[agg221]

The only way to be sure what you have is to measure the height of the head.

There is a recent topic on 9:1 compression heads and some head heights given.

This thread:

https://www.series2club.co.uk/new_forum/index.php/topic,1268.msg13417.html#msg13417

but I would think you would need to take the head off to be confident of the measurement?

Alec