Are 1550cc achievable from a 1275

how far can a 1275cc be bored?

There is a kit here to do 1460cc. How big would you need to go to get 1550cc?
http://www.swiftune.com/Product/1423/sw ... n-set.aspx

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With a 74.7mm bore and aftermarket 91mm stroker crank you can get to 1596cc.
However Vizard said it's a rough running motor, and devoted a chapter to proving it's pretty pointless.

He concluded 86mm stroke is the max worth doing, that will give 1508cc with 74.7mm bore.

The pistons used for all this fun back then were Triumph 2.5PI ones. Dunno if still made...

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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.

This is 1550cc
http://www.ebay.com.au/itm/272006478509 ... EBIDX%3AIT

Back in the early 80s For long stroke A series I used to use the Mazda Capella Pistons from mazda TC engine. They are shorter in deck height and the only mod piston needs to make fit on rod is that the gudgeon pin hole needs to be honed out to fit the cooper S gudgeon pin. They start from STD at 73 mm to about 74.5mm. Great piston. I mentioned these to Graham Russell back then and he seemed very interested. I think the pistons he sells now are the same but he had them factory made for use in Minis. Using the 2.5l Triumph Piston which fits straight on the rod used to involve shaving a fair chunk out of the top of the block something like 3/8 of an inch. Good bye engine number etc. There were even people using Datsun Pistons back then which involved fitting a Bush in the rod to take the smaller datsun pin. I considered this as another thing to fail that was when I sat down and worked out I can use the Mazda piston. There were people that told me it wouldn't work. Them i proved wrong I still have one of my Road Minis with one of these Modified engines using Mazda pistons which I built back in 2004 still going strong. I still have another engine sitting here all wrapped up which I bored out to 74.5 using these Mazda Pistons which I never got to finish as I suddenly stopped racing Speedway. It is complete Pistons fitted to Rods and stroked '1505' crank (84 mm stroke). Which I will be selling soon. Big clear up coming.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

There you go. I had a TC engine in my old 323 and never knew it had such performance potential in it

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Ahhh,,, i know the car,,,

I hope it`s still owned by a friend of mine (Bob)

i`ll be contacting him shortly

Anyways,,, one of the reasons that motor exists in that car is because of my own 1510cc engines
there`s a whole story devoted to this situation & it`s a funny one, lots of Lakeside & other race tracks involved anyways,,, for another day...

but my mate Stew has a 1591cc in his, with 6-speed dog box & Arden alloy x-flow head
& so yes it`s do-able & yes it`s been done , & yes that one is real cause i know it is

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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.

oh, & just to let everyone know,,, just the motor/box is worth the starting bid... easilly!!!
& that car does 1min6secs around Lakeside with the owner driving it,
i know it is well faster than that tho, even tho Bob drives well, no offense intended or meant or implied
just that it has way more in it than what Bob did with it.
he runs it up every week or so to keep it fressh & lovely, it`s been a very well looked after car

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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.