I remeber when I got my 850 it a lot of trouble engaging first due to the Cooper S heater in the way. Can't say I had any interest in driving the car. So out the little motor went and in the bigger motor went.

I wouldn't do it, but hey I'd love to have a good laugh when an 850 at a dyno day keeps up with the 1100s and maybe even passes them!

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

Later 850s got a crank with a stronger tail, it was 1.5" diameter like a 998 one.
But it still had the wider main bearings and skinnier crank webs...
The Poms seem to be able to lighten them heaps for competition then rev their tits off.. but as said to me by Graham in Aus, they don't last a long time...

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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.

Bbut obviously if the level of lightening can be brought down a peg or two and so too the rev limit, the lifespan would increase?

yesno?

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Lightening them by wedging etc reduces the bending stresses in the crank, it's the rpm that kills them in competition.
"Oooooo I got 9500 rpm last run" 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.

so is it still possible to to get decent power at a moderate rpm?

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I've been reading CLive Trickeys book building and racing an 850 mini and checking with Graham in aus as well and apparently they also reground 998 cranks and lightened etc them as well . It wasn't wuite 850cc but not far off it , not sure about the rules of racing but it sounds good for a street 850 .

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i'd be happy if it still had an 850 engine number...

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Define decent power and moderate rpm.

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

Making the car go fast and still being able to hear the MiG 28 while in a 4g inverted dive.

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My 850 is by no means 'radical'....202 head, maniflow 3-1, 1.5" SU, J thingy cam, and it's quicker than a stock 1098 from 0-100.

Race spec you're talking 75bhp, but as you can imagine perhaps not for the street, and the power will all be on the high side of 5k rpm

Your's is similar spec to what's in my sports850 smac , except my motor is tired and twin 1 1/4's , unknown 3 into 1 and 1 3/4 exhaust . It seems to be efficient in and out enough for the capacity , similar to a normal 850 to start off with but speed/power climbs rapidly over 2000 rpm compared to standard .

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yeah im talking bolt on power, as was mentioned plenty of times, once you start messing with the internals you might aswell use a 998 or 1100..

same thing with a race motor, no point building an 850 for race or to beat other minis.

i think the only thing left for them is to make a road motor, and for that they need some more power and efficiency.

i am thinking just bolt on the 202, zorst, induction, and keep the revs below 6k...

how do you keep up and pass someone at a dyno day?
im talking on the road!

Like an 850 getting the same power as a 1100, or more. Pretty straight forward on a dyno.

Anyways, 'testing' on the road may not be safe - disclaimer.

Yes the road is important, but then tyres and stuff (standing start) and suspension setups com into play (once again standing start). To be equal both would have to be already going say 20kph in first, before the start, then the torquest would over take. Forget it.

Just go to a dyno day amd compare.

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

yeah i know, but you said it in a funny way