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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » C20let timing with XE inlet cam


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Author C20let timing with XE inlet cam
Aidan-Fleming
Member
Registered: 17th May 08
Location: Westhill, Aberdeenshire
User status: Offline
18th Mar 13 at 10:29   View User's Profile U2U Member Reply With Quote
Me and my mate fitted his let in his nova at the weekend, but now heard that because it has an XE inlet cam the timing needs to be 1 notch back. Is this correct or have I heard bollocks? Before I go take engine back out.

Cheers
Corsa-C20LET
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Registered: 4th Dec 12
Location: scotland
User status: Offline
18th Mar 13 at 10:48   View User's Profile U2U Member Reply With Quote
If its the standard cam pulley then leave it on the standard marks. If its a vernier then it should be half a tooth retarded

But all this should be properly setup with a dti gauge ect.
Aidan-Fleming
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Registered: 17th May 08
Location: Westhill, Aberdeenshire
User status: Offline
18th Mar 13 at 11:38   View User's Profile U2U Member Reply With Quote
Okay yeah is standard pulley. Thanks
Corsa-C20LET
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Registered: 4th Dec 12
Location: scotland
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18th Mar 13 at 11:39   View User's Profile U2U Member Reply With Quote
just run it on the standard marks untill you find a vernier then bud
Aidan-Fleming
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Registered: 17th May 08
Location: Westhill, Aberdeenshire
User status: Offline
18th Mar 13 at 11:47   View User's Profile U2U Member Reply With Quote
It wouldn't fuck engine would it?
Rsmith
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Registered: 20th Feb 10
Location: Ipswich Suffolk
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19th Mar 13 at 21:08   View User's Profile U2U Member Reply With Quote
if its standard pulleys time up as usual put a vernier on the inlet cam retard by 7 degrees
Corsa-C20LET
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Registered: 4th Dec 12
Location: scotland
User status: Offline
19th Mar 13 at 23:09   View User's Profile U2U Member Reply With Quote
No you dont.

You retard the crank by 7deg. Which in turn would mean you only retard the cam by 3.5deg as there two cam revolutions in one crank.

Gets allot of people wondering that one. 100% 3.5 deg on the cam pulley tho....
thomson
Member
Registered: 18th Jan 11
Location: scotland
User status: Offline
20th Mar 13 at 06:53   View User's Profile U2U Member Reply With Quote
What's the gains to be had with this mod?

 
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