And posibly as a drive for Lucas or Tecalmit mechanical fuel injection pump?
Or were these belt driven?
As per the fuel injected Works rally cars !
| ausmini https://www.ausmini.com/forums/ |
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| 648 cam extra gear https://www.ausmini.com/forums/viewtopic.php?f=2&t=50405 |
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| Author: | norton [ Wed Feb 18, 2009 9:03 am ] |
| Post subject: | 648 cam extra gear |
Can anyone tell me what the extra gear is for on this cam ? http://cgi.ebay.com.au:80/ws/eBayISAPI. ... SS:AU:1123 |
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| Author: | TheMiniMan [ Wed Feb 18, 2009 9:09 am ] |
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Some were used as a mechanical taco cable drive gear,,, others were used for dry sump drive on Nth/sth engines |
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| Author: | graham in aus [ Wed Feb 18, 2009 9:31 am ] |
| Post subject: | |
And posibly as a drive for Lucas or Tecalmit mechanical fuel injection pump? Or were these belt driven? As per the fuel injected Works rally cars !
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| Author: | TheMiniMan [ Wed Feb 18, 2009 12:36 pm ] |
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oops yeah Graham,,, as i was typing my last reply i kept thinking there was another reason for them too,,, altzhiemers kicking in pretty bad these days  but hey... you got it
& yeah some were belt driven external types & others were driven off that cam gear, |
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| Author: | simon k [ Wed Feb 18, 2009 1:24 pm ] |
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jeez, I bet Matt and Graham have both added to their watch lists "ohhh, gotta have that to add to my pile of obscure stuff" |
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| Author: | TheMiniMan [ Wed Feb 18, 2009 4:36 pm ] |
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hee hee,,, i already have a couple of thos simon
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| Author: | Morris 1100 [ Wed Feb 18, 2009 4:51 pm ] |
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When this cam was designed it was for Formula Junior in the first half of the 60s. The extra gear could have been for dry sump as injection was not allowed under Junior regs and was probably a long way off in small single seat cars. When BMC did run the injection Mini in 1968 did they run a Lucas pump on the back of the engine? How did they get the big Lucas pump to fit back there?
I have a 648 cam in the shed somewhere, I knocked back another 648 cam with roller bearings and the Cooper S block that went with it. 
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| Author: | norton [ Wed Feb 18, 2009 6:17 pm ] |
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Always something new to learn about these cars |
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| Author: | TheMiniMan [ Wed Feb 18, 2009 8:49 pm ] |
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full roller cams, (bearings & lifters) have been done by a few people in the past,,, i`m pretty sur the cost, time stuffing around & any slight gain from it all didn`t weigh up enough to warrant mass production The fuel injection pumps i`ve seen hanging off the fuel pump hole were in nth/sth configuration,,, never seen one set up off the back in a mini tho,,, but same cam none the less |
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| Author: | Timbo [ Wed Feb 18, 2009 8:51 pm ] |
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The lucas injection Minis had a cam with a long nose that stuck out through the timing cover and drove the metering unit on the front of the engine. I'm not sure how the pump was driven, I think they were electric. There is a great thread on this subject on the Mk1 Performance Conversion forum, the pictures below comes from there. http://www.atfreeforum.com/mk1mark/viewtopic.php?mforum=mk1mark&t=1862&postdays=0&postorder=asc&start=0&mforum=mk1mark 
Tim |
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| Author: | graham in aus [ Thu Feb 19, 2009 10:45 am ] |
| Post subject: | |
Yes Simon, I've got a couple of em too! 
I was always told that the extra gear was for injection pumps, but a s I typed it I thought Hmmmn? Maybe as Matt said, inline only? I have seen the belt driven pumps too, and I should have known Mark Forsters site would clarify! Cheers Graham 
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| Author: | Morris 1100 [ Thu Feb 19, 2009 4:30 pm ] |
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Timbo wrote: The lucas injection Minis had a cam with a long nose that stuck out through the timing cover and drove the metering unit on the front of the engine. I'm not sure how the pump was driven, I think they were electric. Cool, that is what we needed to see. The metering unit (sometimes called a pump) was not driven by the extra gear on the cam, so that blows the fuel injection theory away!
There is a great thread on this subject on the Mk1 Performance Conversion forum, the pictures below comes from there. http://www.atfreeforum.com/mk1mark/viewtopic.php?mforum=mk1mark&t=1862&postdays=0&postorder=asc&start=0&mforum=mk1mark Tim Yes the pressure pump would have been electric/Lucas/very unreliable. |
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| Author: | mad-mk1 [ Thu Feb 19, 2009 6:13 pm ] |
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i know this will probably sound silly, but could it be used to turn a supercharger? |
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