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brett
 Post subject: Timing Degrees?????
PostPosted: Tue Mar 20, 2012 9:41 pm 
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1275cc
1275cc
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Joined: Tue Aug 17, 2004 1:21 pm
Posts: 3391
Location: Western Queensland
Hi guys, what Deg should my Cooper S be set at??

Its a 1310 with a works cam and stage 3 head??

regular Cooper S dizzy, and twin su carbs.

Any idea? :? :?

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simon k
 Post subject:
PostPosted: Tue Mar 20, 2012 10:19 pm 
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Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15912
Location: Wodonga - Vic/NSW border
start where the workshop manual says to start - 5 degrees?

I used to find it was always "about right" if I advanced the distributor to where it idled the fastest, then go backwards a little bit to where it sounded nice. After that I'd go and drive up my usual test hill and listen for pinging. Eventually I got a timing light and discovered that I was just about spot on...
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TheMiniMan
 Post subject:
PostPosted: Tue Mar 20, 2012 10:50 pm 
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Joined: Mon Sep 06, 2004 4:36 pm
Posts: 8606
Location: Brisbane
2 deg before TDC

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brett
 Post subject:
PostPosted: Tue Mar 20, 2012 11:14 pm 
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1275cc
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Joined: Tue Aug 17, 2004 1:21 pm
Posts: 3391
Location: Western Queensland
thanks guys!!

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1970cooper
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PostPosted: Wed Mar 21, 2012 4:43 am 
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Joined: Tue Sep 09, 2008 6:19 am
Posts: 206
Location: CAMDEN NSW
my cooper is set at 2 deg

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Beanie
 Post subject:
PostPosted: Wed Mar 21, 2012 9:54 pm 
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Joined: Sun Dec 18, 2005 10:54 am
Posts: 529
Location: Adelaide, SA
30 degrees BTDC @ 4500 RPM

That's what mine is on 1330 big head 296 cam 98 octane fuel

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drmini in aust
 Post subject:
PostPosted: Wed Mar 21, 2012 10:06 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39757
Location: near Baulkham Hills, NSW
I gave up setting timing static or at idle years ago.

Most 1275s on 98 unleaded run best at around 30° total advance @ 4000 rpm and up.
It's the middle of the ballpark. Works for my 1412 stroker.
Some need slightly less, but my 1360 (282 cam and big head) needs 38° total because a PO bathtubbed the head. :shock:

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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. :mrgreen:
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