Just wondering what you guys have used in sports type cams for the 1275 Cooper S engines
I am looking for something street-able but giving good top end
GR suggested a 266 cam
But i was looking at some Kent cam specs for the 276 cam
All input appreciated

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1970 MK2 Cooper S

I have a GR 266 ss cam in my 1275 but haven't used it yet. Will know soon when I dyno the engine.


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Waggott Police Grind.

Cheers

RE266 SS with 1.5 rockers works well with twin HS4 carbs. So does an RE13, which gives a little more top end.
I ran a Camtech VP3 with 1.5 rockers in my 1310S motor. Carby was a 45 Dellorto.
After 50,000 miles the lobes were worn badly.
Graham's cams have a bigger nose radius, they last longer.

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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.

I'm using a GR 266ss, in an 1100S block out to 1330cc, single 1.3/4 su & maniflow extractors, std s type rockers,
very good road cam with good spread of power, it takes full throttle less than 2000rpm,
goes to 6500 / 7000, & has great torque,
hope this helps

So who has a suitable used camshaft i can buy to send in to get reground
Rather keep my original cam and regrind another
MK2 Cooper S 1970
Do these have wider lobes than std cams?
And what type of drive for the oil pump is used?

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1970 MK2 Cooper S

All 1275 cams have the wider 1/2" lobes. So do all A+ motors including 998A+.
Cooper S are pin drive, other 1275 A series are spider drive.
A+ are all slot drive.
To use spider or slot drive in an S block you need to drill and tap 1more hole in the block.

Cooper S pin drive pumps are very expensive now. The others are cheap, around $40.

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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.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

A lot easier and cheaper to buy it already done - only $195 outright or $165 exchange.

This engine was rebuilt by Rodney Hansen in Toowoomba some years ago
I will contact him to see if he had done any mods like camshaft etc
But i feel its still a standard cooper s engine

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1970 MK2 Cooper S

Was talking to a well known Mini person today and he suggested a 30/70 cam
Now if i am correct that means the inlet opens 30 deg btdc and closes 70 deg atdc
So how does all this compare to duration specs on cams
Anyone got a graph to show how these 2 different specs workout
Been a long time since i stuffed around with cams in engines and since i had my brain removed due to lack of use i have forgotten

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1970 MK2 Cooper S

Those numbers (you add 180deg) give 280 degrees duration. These days you can get better torque and HP whilst running less duration. Better drivability.
Big duration = a pig in traffic, usually.

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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.

But how do you find out the btdc and abdc figures with today's cams when they only give you a duration

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1970 MK2 Cooper S

go to kent cams ( for example and look at their bmc grind specs,,,,,,

Ask the cam grinder. GR will tell you if you ask nice.
Tighe cams has their specs listed, so does Camtech.
There is much more to cam design than duration.

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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.