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PostPosted: Fri Jan 12, 2018 3:59 pm 
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Joined: Sat Jan 14, 2017 5:41 am
Posts: 1
Good day,

Would anyone have an idea what the value of a Cooper S 970 S crank AEG330 is.

EN40B, Standard mains and 10thou big ends.

Regards
Colin


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PostPosted: Sat Jan 13, 2018 2:52 pm 
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Joined: Wed Jul 13, 2016 9:16 pm
Posts: 192
It’s a difficult one as not many 970S are around - even less at project stage needing an engine...

I would hang onto it and try and find a block. Together will be a lot more valuable.


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PostPosted: Sun Jan 14, 2018 2:31 am 
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Joined: Sat Jun 10, 2017 12:46 am
Posts: 306
Location: Cambridge, MA, USA
Not quite as rare, but there's a std:std 997 crank on eBay currently with £500 starting bid

https://www.ebay.co.uk/itm/173025934482


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PostPosted: Sun Jan 14, 2018 1:36 pm 
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Joined: Sun Sep 22, 2013 1:47 pm
Posts: 661
Location: Coastal VA USA
I don't think finding a 970 crank is quite the issue finding connecting rods for one is. Steve (CTR)


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PostPosted: Sun Jan 14, 2018 1:58 pm 
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Joined: Sun Jun 27, 2010 5:26 pm
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I have never had anyone ask me for a 970 engine .
They are too rare for there own good , I normally just use blocks for 1071,s so have quite a few sets of rods .
As far as I know there are very few used in competition now and most people just buy new stuff for racing .
Also got quite a few thick flange 970/ 1071 blocks.

I would say crank is worth £350 to £600 but it's finding someone that wants one .


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PostPosted: Sun Jan 14, 2018 2:00 pm 
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CooperTune wrote:
I don't think finding a 970 crank is quite the issue finding connecting rods for one is. Steve (CTR)



It's not really a huge problem as you just use normal rods and deck the block. Used to be very popular in grass tracking when the class 4 limit was 1000cc. 970 cranks could be got for buttons as no one else wanted them.

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should you wish, you can contact me on rich@minispares.com

'long beard boss'


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PostPosted: Mon Jan 15, 2018 12:20 am 
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Joined: Sat May 24, 2014 7:12 am
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iain1967s wrote:
Not quite as rare, but there's a std:std 997 crank on eBay currently with £500 starting bid

https://www.ebay.co.uk/itm/173025934482


Listing was ended so we have no idea as to whether it sold or not!


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PostPosted: Mon Jan 15, 2018 2:18 pm 
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Joined: Sun Sep 22, 2013 1:47 pm
Posts: 661
Location: Coastal VA USA
Am I confused or do 1275 and 1071 engines use the same con rod and the 970 s not use a con rod which is 1/8 inch longer? I have 1071 s, 1275 s and a 970 crank. I also have 1275 S blocks and the one 1071 block. The 1071 block is about .250 shorter than the 1275 s. I have not mocked up any of the short stroke parts. I'm not happy about surfacing .250 off a block quite sure I'm not cutting .375 off one. I have been on the hunt for 970 rods or 6 inch rods with std small end bore. I'm currently running a thin flange S block which came along about the same time I bought my 67 1275 S in 71. Now a daily driver the block has been run at std., .020,.040,.060 and now 73 mm. Steve (CTR)


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PostPosted: Mon Jan 15, 2018 3:02 pm 
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steve

its certainly possible to do it, many autograss cars did just this in the 1980s when the class limit was 1000, when it went to 1130 they all started using 1071s instead.

years ago me and mark bought a load of cooper s blocks from a ex racer, all had been chopped right down...grr......

a couple of them where fj blocks as well :evil:

_________________
should you wish, you can contact me on rich@minispares.com

'long beard boss'


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PostPosted: Mon Jan 15, 2018 5:35 pm 
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Joined: Mon Jul 24, 2017 5:55 pm
Posts: 302
rich@minispares.com wrote:
CooperTune wrote:
I don't think finding a 970 crank is quite the issue finding connecting rods for one is. Steve (CTR)



It's not really a huge problem as you just use normal rods and deck the block. Used to be very popular in grass tracking when the class 4 limit was 1000cc. 970 cranks could be got for buttons as no one else wanted them.


am I correct in interpreting this as all S rods are the same, but it is the crank (and block height of course) that is different?


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