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Formula Junior/1071S myths (revisited)

Posted: Tue Jun 29, 2010 10:21 am
by Toby
I thought it might be useful to dig up this old thread on the myths regarding the 1071 engines that was started on the mk1, mk1 forum : http://www.atfreeforum.com/phpbb/viewtopic.php?t=2000

Recently I managed to find a block for my own mini but I was surprised to find a extra letter on the outside of the block. ( Many, many thanks to Oliver, Christiaan, Bart and Nick for helping me out on obtaining it! )

Here are some pictures of it as it is now:

Image

What I've never seen before is the extra letter B near the opening for the dipstick.

Caps are also number with an E:

Image

Any body got any details on this?

Re: Formula Junior/1071S myths (revisited)

Posted: Tue Jun 29, 2010 9:13 pm
by Mini4Ever
masnarda wrote:( Many, many thanks to Oliver, Christiaan, Bart and Nick for helping me out on obtaining it! )
It did travel quite an unlogical route before it ended up at your place :D

Re: Formula Junior/1071S myths (revisited)

Posted: Tue Jun 29, 2010 10:15 pm
by 251 ENG
The caps are not the originall,s and they are the wrong bolts .

Does the block have a dry sump pump hole and the little boss for the 1071 tag on back ?

Re: Formula Junior/1071S myths (revisited)

Posted: Tue Jun 29, 2010 10:51 pm
by Toby
there is a little boss to mount the tag on the back, no hole for the dry sump pump and I do have correct bolts for the block, these are just the ones that came with it.
What type of engine would the caps belong to then?

Re: Formula Junior/1071S myths (revisited)

Posted: Wed Jun 30, 2010 6:23 pm
by 251 ENG
Hello

The blocks not a very early one then , should have a number starting with C stamped by water pump . I would guess between C 1300 and C 2500.

Caps are off a late 1275 s block , probably a thick flange one .

Re: Formula Junior/1071S myths (revisited)

Posted: Thu Jul 01, 2010 8:10 am
by Toby
The block is meant for my august 63 built S. So it doesn't have to be that early I guess. However I have never seen the letter B cast in before. Will have to check to see if there are any numbers near the water pump.