Type 4 mechanical compression ratio, Why is the factory compression so low? Options

[Beebo Kanelle]

OK, here's a fun one for the novice to ponder and you experts to answer:

Why is the factory mechanical CR so low?

and for reference, what is the highest mechanical CR that can be physically achieved? assume no octane limitations -

I'm just looking for the design limit for the highest CR that can be / has been in a Type 4 engine using available technology.

Thanks

[Beebo Kanelle]

Its getting done...

maybe not on a Canadian schedule and,

Mark, I'm sorry you're having problems with your bunghole but, it will not change my methodology - I know its tough being cooped up in the winter snow & ice in Canada
Here, its neither the land of 20 hour nights nor the midnight sun here... we acutally have a life, get out an work during the winter days.

But, I am not going to just hang crap on a engine and see how long it takes to fall off -

As Mr Raby says 'Its all in the combo" - I am going to finish the design calculations and simulate them on the computer... only then will I start building

If you look at the start of this thread, I was looking for the mechanical limits of the type 4 design, as I have have zero prior experience with it.

so, be patient and, like I said, if it all blows up, so be it. but if it works, I'll gladly share everything.

Thanks to all