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| Cams for Cooper S https://ausmini.com/forums/viewtopic.php?f=2&t=93772 |
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| Author: | GundyGuy [ Sat Sep 17, 2016 4:52 pm ] |
| Post subject: | Cams for Cooper S |
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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| Author: | TimW [ Sat Sep 17, 2016 4:56 pm ] |
| Post subject: | Re: Cams for 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. Sent from my iPhone using Tapatalk |
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| Author: | DavidE [ Sat Sep 17, 2016 5:27 pm ] |
| Post subject: | Re: Cams for Cooper S |
Waggott Police Grind. Cheers |
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| Author: | drmini in aust [ Sat Sep 17, 2016 6:31 pm ] |
| Post subject: | Re: Cams for Cooper S |
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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| Author: | rhaj [ Sat Sep 17, 2016 8:29 pm ] |
| Post subject: | Re: Cams for Cooper S |
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 |
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| Author: | GundyGuy [ Sun Sep 18, 2016 7:09 am ] |
| Post subject: | Re: Cams for Cooper S |
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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| Author: | drmini in aust [ Sun Sep 18, 2016 7:34 am ] |
| Post subject: | Re: Cams for 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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| Author: | winabbey [ Sun Sep 18, 2016 12:48 pm ] |
| Post subject: | Re: Cams for Cooper S |
GundyGuy wrote: So who has a suitable used camshaft i can buy to send in to get reground http://minikingdomonline.com.au/product ... ight-sale/ |
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| Author: | gtogreen1969 [ Sun Sep 18, 2016 1:39 pm ] |
| Post subject: | Re: Cams for Cooper S |
winabbey wrote: GundyGuy wrote: So who has a suitable used camshaft i can buy to send in to get reground http://minikingdomonline.com.au/product ... ight-sale/ A lot easier and cheaper to buy it already done - only $195 outright or $165 exchange. |
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| Author: | GundyGuy [ Sun Sep 18, 2016 3:42 pm ] |
| Post subject: | Re: Cams for Cooper S |
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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| Author: | GundyGuy [ Sat Oct 08, 2016 4:34 pm ] |
| Post subject: | Re: Cams for 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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| Author: | drmini in aust [ Sat Oct 08, 2016 5:39 pm ] |
| Post subject: | Re: Cams for 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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| Author: | GundyGuy [ Sat Oct 08, 2016 5:57 pm ] |
| Post subject: | Re: Cams for Cooper S |
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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| Author: | FNQ [ Sat Oct 08, 2016 6:21 pm ] |
| Post subject: | Re: Cams for Cooper S |
go to kent cams ( for example and look at their bmc grind specs,,,,,, |
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| Author: | drmini in aust [ Sat Oct 08, 2016 8:13 pm ] |
| Post subject: | Re: Cams for Cooper S |
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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