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Registered
Join Date: Dec 2005
Location: Palo Alto, CA
Posts: 203
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What distributor for a 2.7 with Webers?
I'm building a 2.7L engine to roughly RS specs: Replacing the CIS with Webers, boring the ports to 36, RSR 8.5:1 pistons, Solex cams.
My understanding is that the stock CIS distributor does not have the right advance curve to match the Webers. Can anyone suggest a different distributor - or someone in the Bay area who can recurve the distributor. Thanks, ----Bill |
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01-12-2006, 09:18 PM
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Registered
Join Date: Jul 2001
Location: mt. vernon Wa. USA
Posts: 8,722
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bump... anybody
__________________
[B]Current projects: 69-911.5, Previous:73 911X (off to SanFrancisco/racing in Germany).77 911S (NY), 71E (France/Corsica), 66-912 ( France), 1970 914X (Wisconsin) 76 911S roller..off to Florida/Germany RGruppe #669 http://www.x-faktory.com/ |
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01-13-2006, 09:10 PM
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Registered
Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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You'll probably find more specifics in the archives, but the later distributors (after 74 or so) use a retarded initial timing spec (0º to 5º ATDC) and a longish mechanical advance curve (total is around 35º BTDC).
The early S and RS distributors (pretty similar) start with a static timing of about 5º BTDC and a shorter mechanical advance curve of around 27-30º (total is around 32-35º BTDC. In addition, these early distributors have a quicker advance curve; most of the mechanical advance is done by 4000 rpm. The exact specs are in the factory manual. You can also have yours recurved to match the factory spec. I think Steve at Rennsport (OR) can do this for you. Hope this helps, Sherwood http://members.rennlist.org/911pcars |
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01-13-2006, 09:22 PM
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