Hi all

There is an 1100S engine I am interested in buying. I can only get limited info from the owner at present inc engine number. I am assuming the later thick flange block is slightly better? Does anyone know around what engine number they swapped to a thick flange?

Cheers
James

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I wish I had some sort of witty quote in my signature

I have had to build both thin and thick flange 1100S, IMO both are as good as each other.
These blocks are both much stiffer than a Cooper S block so the same criticisms don't apply.

[edit] at 12YD/Ta/H7611 they were still thin flanged.
12YD/Ta/H8667 is a thick one. So somewhere in between 7611 and 8667.... they changed.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks Doc - typical - the one I'm interested in is right in the middle of those numbers.. 79xx.

I read somewhere that they changed from a small to large journal crank too? Would that make much difference either?

_________________
I wish I had some sort of witty quote in my signature

the change from small journal to large journal didn`t happen at the same time as thin flange to thick flange tho

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

They changed from small journal to large around 12YD/Ta/H10500. I'll dig out the actual number shortly.
[edit] it was at 10487/10488.

Personally I prefer the small journal. Large journal cranks have poorer counterweighting and their rods are lots heavier.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks Doc

_________________
I wish I had some sort of witty quote in my signature