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1098 Cams
https://www.ausmini.com/forums/viewtopic.php?f=5&t=1690		 Page 1 of 1
Author:  Anto [ Fri Aug 27, 2004 7:20 pm ]
Post subject:  1098 Cams
Can anybody tell me specs of a standard 1098 camshaft (or MkI Cooper S I think they're the same)? I know 998 camshaft isn't so good but I can't find info on what my 1098 cam is (or might be - not sure if the cam is original spec or not).

Cheers,
Anto.
Author:  Anto [ Fri Aug 27, 2004 8:20 pm ]
Post subject: 
Sorry Christoph just pointed out it's in the BMC manual. 5/45-51/21 that equates to 230/252 duration - not *that* good! The Camtech 620 is 260/252 so that should be an improvement over my current cam.

Anto.
Author:  drmini in aust [ Fri Aug 27, 2004 8:22 pm ]
Post subject: 
Timing is 5-45 inlet/51-21 exhaust, valve lift .318" approx.
Inlet duration 230*, exhaust 252*.

Regrind the sucker if you want it to GO! :wink:

Something around 270* duration goes nice in a modified 1098.
Bobtel's 1152 flies now, it's got a Russell Engineering:RE-13 cam like mine. But it's got a bit more than 270*...wink:

Anto wrote:
Sorry Christoph just pointed out it's in the BMC manual. 5/45-51/21 that equates to 230/252 duration - not *that* good! The Camtech 620 is 260/252 so that should be an improvement over my current cam.

Anto.

Be careful with Camtech cams. Very pointy lobes...I had a #619 (VP3) it wore the lobes down halfway in 40,000 miles.. :cry:
Author:  Anto [ Fri Aug 27, 2004 8:27 pm ]
Post subject: 
I'm thinking if I do port the 202 (when I get some money!) I may aswell get an RE-13, if I'm going to bother - go the whole way in the first place :) No point atm with the smog head - it wont rev past 5,500 rpm!

The camtech is second hand too - if you are right then it could be pretty worn as it is.
Author:  drmini in aust [ Fri Aug 27, 2004 8:32 pm ]
Post subject: 
If it's not worn bad you maybe can get it reprofiled. The one in my car now was an S, then a Bert Jones, then a 731, now it's an RE-13... :shock:

Heh if it wears I got a virgin ground one.. :wink:

Graham's cams all have a nice big lobe radius..
Author:  Gareth_1330 [ Fri Aug 27, 2004 8:35 pm ]
Post subject: 
My cam had been ground at least once before i got camtech to put a VP3 grind on it, like kevs, and like kevs mine chopped its lobed of pretty badly, luckyily??? i snapped the crank after about 30 od thousand KM's? due to a dodgy grind and detected the problem (or graham did)

The point im trying to get to being he was still able to grind his RE-13 onto my cam..... So theres every chance he will be able to put another grind on it 8)

G
Author:  gafmo [ Fri Aug 27, 2004 10:23 pm ]
Post subject: 
Alltought you are in Canberra I would still give Mr Russell a call for what he may be able to do :idea:
Number one in regrind cams
Author:  drmini in aust [ Wed Sep 01, 2004 7:20 pm ]
Post subject: 
Bobtel is now running an RE-13 in his bored 1098, with twin HS4s etc it kicks ass (or is that arse?).. anyway it flies! :lol:

kazjim has one too (with modified LCA) in his turbo 998. It truly is a cam for all seasons.. :wink:
Author:  9YaTaH [ Wed Sep 01, 2004 8:03 pm ]
Post subject:  MULTIPLE PERSONALITIES
drmini in aust wrote:
If it's not worn bad you maybe can get it reprofiled. The one in my car now was an S, then a Bert Jones, then a 731, now it's an RE-13... :shock:

Heh if it wears I got a virgin ground one.. :wink:

Graham's cams all have a nice big lobe radius..


That CAM is probably very confused!! I wonder if it hankers sometimes for the days when it was a brand new S?? :shock: :?
Author:  drmini in aust [ Wed Sep 01, 2004 8:37 pm ]
Post subject: 
Heh, it won't be getting any more grinds! It just cleaned up.. :wink:
Author:  gafmo [ Wed Sep 01, 2004 9:03 pm ]
Post subject: 
[quote="drmini in aust"]The one in my car now was an S, then a Bert Jones, then a 731, now it's an RE-13... :shock: quote]

Does that mean it was a 731 and GR made it into a RE-13 :idea: ...Interesting :?: or was it a new one :arrow:
Author:  drmini in aust [ Wed Sep 01, 2004 9:22 pm ]
Post subject: 
gafmo wrote:
drmini in aust wrote:
The one in my car now was an S, then a Bert Jones, then a 731, now it's an RE-13... :shock: quote]

Does that mean it was a 731 and GR made it into a RE-13 :idea: ...Interesting :?: or was it a new one :arrow:


There's enough meat on a stock Mini or S cam to do a few regrinds, unless you're talking race profiles... :wink:

(Many) years ago, I got a factory 731 cam from a mate who worked in BMC's plant. He had run it in his Cooper, and it had one badly worn lobe.
I got Bert Jones to grind a `master' (like a template) from it, and then regrind onto an S cam.

Fast forward to 1980- I bought a `68 Cooper S that had a Bert Jones cam, it was a POS grind. So I got Bert to find my master and put a 731 grind on this cam.

A few years back I needed more grunt when I started running my red car, so I fitted the Camtech 619 (VP3) one in. When it wore out I pulled this one out of my stash and got Graham Russell to grind it again, to an RE-13. 8)

BTW the duration on this cam is around 277* inlet/286* exhaust.
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