Hi guys,
I have two questions that are related to my current engine rebuild. The bore has been checked and only needs a hone. As it is a 1275 with 60thou bore, what size is the engine?

Also, the engine is being balanced and the flywheel lightened. Unfortunately I need a new one piece steel flywheel. Can this come from any sized motor eg 998, 1098 or does it have to be from a 1275. If this is the case, does anyone have one in good condition that they want to sell me?

Thanks in advance.

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Ryan Filippi
Minis In The Gong
[email protected]
www.minisinthegong.com.au

My spreadsheet says 1328.7cc.



Why do you need a one-piece flywheel specifically? I would have thought the two-piece would be suitable too. As far as I know (and I could well be wrong) it doesn't matter where the flywheel comes from, especially if you're getting it lightened and balanced.

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Simon

The adventures of an owner builder in the Tallarook Ranges

Hi Ryan,

Your engine is a 1330.

And regaring your flywheel,,, the crank sizes are different betweent the 1275's and the small bores,,, but I don't know if the effects the tail on the crank though,,, (I only have 1 small bore engine and I haven't rebuilt it nore can I remember the last time I built one) I tend to think it does effect the flywheel though.. Some one will correct me if I'm wrong so don't worry

edit---> sorry sgc!!! we posted at the same time...

Yep,,, just went and checked in the shed... I was wrong,,, they are the same size

Engine builder requested a one piece.....I guess he prefers them....and I trust him.

So Phat Kat.....you reckon small bore and big bore have interchangeable flywheels. Thanks for checking.

Does anyone have a one piece steel one that they want to sell......I'm in Wollongong, but will be in Sydney from Friday arvo till Sunday evening.

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Ryan Filippi
Minis In The Gong
[email protected]
www.minisinthegong.com.au

where are you getting your build done?

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1975 Leyland Mini: 1060cc - resto/ ex-hsc project.

pm sent Leighton.

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Ryan Filippi
Minis In The Gong
[email protected]
www.minisinthegong.com.au

all flywheels from 1965 on are interchangeable, smallbore or large.
NONE ARE STEEL!. They are grey cast iron. (the 2 piece ones do have a steel centre).
If you want a STEEL flywheel it is aftermarket, from UK.

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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 for clearing that up doc.

I just presumed it was steel.

So its just a one piece one that I'm after than. Are they preferable? The engine builder wants to use it so that he can balance and lighten.

Does this sound correct or have I got my wires crossed?

Does anyone have one I can buy?

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Ryan Filippi
Minis In The Gong
[email protected]
www.minisinthegong.com.au

I lighten either the 1 piece or 2 piece the same way. No difference IMO.
TheMiniMan only lightens 2 piece, he won't touch the 1 piece.
But he puts friggin great holes in `em, I just turn them in the lathe a la Vizard.

Whatever, don't make them too thin, cast iron isn't real strong, tensile wise. Remember where it is, imagine what external personal components you might lose if it goes BANG at 8000rpm+

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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.