Where do I get a police chaser camshaft ?

are they any good?

any extra info on them

Thanks

The camshaft in Cooper S motors supplied to NSW Police with the MK II S and Clubman GT were BMC/Leyland Special Tuning items. The part number is C/AEA731 (earlier pin and slot oil pump drive) and C/AEA800 (later spider oil pump drive) - exactly the same specification, only the oil pump drive was different. I posted the camshaft page out of the Special Tuning book that gives the camshaft characteristics in another thread some time ago. I'll try and find it. It is called a Road Rally grind by ST.

This is the thread:

http://www.ausmini.com/forums/viewtopic.php?t=44511

so it was a copy of the 631 cam

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

731 was pretty tame in a 1275 really. Went OK in a 1098 though.
There are MUCH better grinds about these days, unless you are building a full anal spec Police S.

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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.

bugger... the 631 was the copy of the 731 cam...Cheers Kev

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

That's Camtech 631...
It's not on their website, but they have a master for it.
http://www.camtechcams.com.au/index.html

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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.

Hi mini is my ride,

What where you after in a camshaft exactly? The 731 is an "ok" cam, it was originally designed by BMC as a race cam (or hot rally cam I can't remember 100% ) for the 850's. It is ok in a 998 for a hot road/rally spec (comes on at about 2000 rpm ish), and in a 1275 is about a warm road cam (comes on at about 1500ish).

Like the Doc said, there are a lot better cams than the 731 around these days... in as much as they are more useable on the road (come on the cam sooner) and produce better torque curves and they even give a bit more power.

What kind of motor is it going in? What were your hopes for it? Some of us might be able to make a few suggestions to point you in the right direction.

Hi

Naw what happened was I saw this cam on a car for sale and thought..
Being police means a good cam but I guess I was wrong

I am after a cam that I can have in a road car that goes real good

Someone said the new RE83

I went to camtech and this one caught my eye

CT 30001621 (a)
Fair idle, good bottom end
and mid range power designed for engines with limited modifications. Min 9:1.
RPM RANGE 1500-6500

In it's day it was a good cam (it's still my favourite cam actually but then again I haven't tried a "new" cam since 1994) but as with everything design's are improved and more modern cams are getting more power with better economy from a more drivable engine . I remember some really wild mini's I've driven in the late 80's/early 90's (idled at 1500 rpm , below that they just wouldn't run and to drive off needed 4000 rpm plus or they coughed and spluttered under load but took off like a rocket above that) and the truth is they most likely had less power than some of the current hot mini's that are much better behaved and much , much easier to drive .

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There are two ways to look at this, if you want to have speed off the the line and pour your budget into making this happen you might end up with a 20thou 1275 with wedged crank and lightened internals, 12G940 machined to give you 9:9.1 compression and 1.5 rockers, Kent 286 cam, lightened flywheel, grey clutch, straight cut gearbox and dropgears with 3:9.1 cross pin diff, twin 1 3/4 SU,s custom manifold with Maniflow LCB's and 1 3/4 inch exhaust with single hot dog muffler,8.4 disks with Wilwood twin spots, electronic ignition etc,etc,etc

You have just spent a lot of money to make this happen, it might sound and feel great off the line but you will hate it for normal driving and on the highway with the 3:9.1 diff you will need earplugs.

Now if you want, put a full cage in it and compete in Hill Climb events, with the money spent it will put a smile on your dial.

Now the other way to look at it is the car that is fun to drive all the time, around town, on the highway and with your foot up it. This could be a 20thou 1275, 12G940 machined to give you 9:4.1 compression and the Doc's rockers, Wade 240 Cam , lightened flywheel , rebuilt gearbox 3:44.1 diff,single 1 3/4 SU on heated manifold with Maniflow LCB,s and 1 3/4 exhaust and mild steel straight through muffler, reconditioned 7.5 disks, electronic ignition etc,etc

You spent less money and its fun all the time, OK you may not beat the Ricer's at the lights but who really cares about them.


My 2c





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A pretty good description of it all there Dean , but remember he has also given his budget of $3,000 (not including buying the 1275 to start with) which would limit how much he could do .

Mini is my ride , if you want to beat the ricers at the lights , buy a ricer , they'll handle the abuse of that style of driving better than a mini gearbox will (and nobody will look twice if the car is impounded for street racing whereas if it's a mini ....) . If you want a really fun car then choose whichever way you're likely to lead from the snails description above and see how much of that you can do within your budget . Remember , a lot of it you can do yourself with the right information which will reduce the costs so get a copy of Vizards bookand start researching headworks .

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Your right Ian I should have put a price range , first option, if you went to a Mini Mechanic and said make me one of these I would'nt expect you to get any change from $9,000, second option, I would expect a bill of at least $4,500 +

Now if you have the skills to build it yourself then the cost comes down.




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I didn't have the expereince or skills to build my engine. i only knew the basics of it's operation.

i would send your engine out for machining and then build it up yourself. it will take longer (check everything at least 2-3 times), but you will learn a lot and it will be considerably cheaper.

buy spending the time on research whether it be: ausmini, manuals,talking to engine reconditioners, experienced people eg. Graham Russell or John Smidt(Mini King) etc. you will easily be able to build your engine

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

haha ok get rid of rice burner thing

I just thought mini's might have a chance (with a small budget I might add)

yeah I just want a mini for taking along free ways and around town

I reckon armed with a Vizard's books, people from ausmini's knowledge
I could build some of it

74Snail...I thought of a webber cause its slightly easier than twin carbies to tune and I thought of single pipe into twin tips. I have 10inch wheels so I will have to have 7.5inch brakes and that’s as far as I had thought about it but thanks for the ideas..

Yes you can

I spent about $2500-$3000 (inc gearbox) on my last motor and it might not out run a skyline (with its current diff, 3.2:1), but It does put up a freaken good fight... and its totally happy in traffic.

Seeing as how you've mentioned Rice burners,, I'm going to ASSume that you are talking Km/h? No worries, no worries at all.

This is a moke I did at the start of the year
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Now there is absolutely nothing flash about this engine. Its at 1293 with a little more than 10:1 compression. There has been NO performance modifications done to this motor, its just been blue printed, not even balanced. This one will not burn off WRX's but it goes hard.

EDIT---> AND ITS IN A MOKE... ie. SAME WIND RESISTANCE AS A HOUSE

Sorry if you misunderstood myself or the doc, but there is nothing reeeaaly wrong with the 731,,, its just that there are much better cams about now days. In a 1275 it doesn't come on until 1500 rpm and there isn't a huge top end advantage.

The problem with running a cam like a kent 286 (the one mentioned by 74snail) is that it doesn't come on the cam till about 2500 in a 1275... which sounds ok in theory, but in practice it can be a pain in the arse in traffic,,, having said that, unlike the 643 or 544 (same grind different oil pump), which are also rally cams that come on at 2500, the kent one isn't as unbearable when its off the cam, you can still drive it easy enough....