I'l just have to check what I have Now

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Stop Licking the Dog...I Don't Care Who Started It

"My race mini saw 9000rpms quite regularly at speedway from about 1982 to about 1988, that`s a lot of revs , for a long time, in a very hard yakka type of racing, nearly every saturday nite, then it did a number of years on the race circuits up here, Lakeside, Morgan pk, Willowbank etc including all the hillclimbs & autocrosses that i do & then it hit Targa Tasmania for 2002"

wow you used one race mini for all of these events? Hmmmm???

i have a steel one on the way its 11lbs but i don't no what that is in Kgs. just need to be shipped

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FOR SALE MInidlx, 1293, GR head, RE-13, GR worked Redline Manifold, 45 mm DCOE,pulsar dizzy , "S" Disc's, Mk II "S" box, 3.65 diff. Minator 10X6's On the loose

its basically 5 kg and thats damn light man

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hope be back on the road soon with a blown 1275.

OK guys, I weighed a standard (later 1 piece) flywheel today and it is 7.6kgs with straps on.
Standard backplate was about 2.8kg.
Not sure how accurate these scales are but I'll check weights again tomorrow on my bathroom scales- also I'll dig out a standard 2 piece one and weigh it.

<EDIT> These weights are crap, I don't trust the scales- see my later post below.

BTW, Russell Engineering lighten them the same way I do, either 1 piece or the later 2 piece. Then he puts holes in 'em.. if it's for a racer.
I've never seen one go bang! either, but I won't lighten them if they have been bashed with hammers etc.

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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.

Yeah the one that we have that has marks from being bashed with a hammer is scary Can't imagine that will ever do 9000rpm

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Lillee - 1969 Morris Mini K

Rupert,,,sorry for mis-leading you,

what i meant to say is,,,that the same """Engine""" that came out of the speedway car went into the circuit car & yes,,, for all those events

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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.

Doc, do you know if anyone does anything special about Ring Gears?

I have heard of one popping off and just wondered whether anyone puts a spot or two of weld or some sort of drill and tap clamping arrangement after sweating the things on????????

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"Show me the Mini!"

Mick,
Ring gears are indeed tack welded, on Mini AUTOMATICS. Not a great idea to tack weld to grey cast iron flywheels though, it doesn't exactly help the metallurgy... but I once saw one done. Not pretty..
My theory is the ring gear is a bloody good interference fit, and will never come loose, as long as you don't go mad milling and drilling through the flywheel, which can negate the original interference fit..

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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.

Well theres a clue...this happened on a race Mini...

which could well have had "mad milling and drilling through the flywheel, which can negate the original interference fit"

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"Show me the Mini!"

OK I've weighed these again.. on my bathroom scales. I trust them more than the POS ones at work.

Lightened (turned) 2 piece flywheel with 1/2" ring gear, no straps on = 5.4Kg

Standard 1 piece flywheel with 3/8" ring gear & straps on = 7.4Kg

Standard Oz backplate = 3.0Kg.

Can't find a stocko 2 pc flywheel- I've lightened `em all!

So I reckon Chong's flywheel has had around 2Kg off it.

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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.

2kg! that's still heaps!

I was expecting 500grams or 1kg off at best! Sweet as Kev!

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Lillee - 1969 Morris Mini K

Also have to remember that weighing the flywheel only gives a rough comparison. Depends where the mass is... thats why some companies do the integral ring gear ultralites which eliminates the extra material for the ring gear to sit on on the conventional type.

Most I take off the outside.
Vizard says you can reduce it on the engine side too, I don't bother- this is light enough for a road car, IMO.

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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.

Why did they have the two different sized ring gears? It would seem a good move to fit the 3/8 one if you want a light flywheel but then again they would probably wear out quicker