1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Timing advice for a carbed SE

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Old Mar 13, 2004 | 06:34 PM
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From: Lost!
Timing advice for a carbed SE

Whats the timing for a carbed SE? Here are the mods:
85 SE w/6ports mechansim removed
RB upper w/dellorto carb
rats nest removed
road race header to 2in straight pipe into a fart can
direct fire ignition as per Jeff20B


Thanks, Ed
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Old Mar 13, 2004 | 07:15 PM
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I have three SE dizzies in my old style four port 13Bs with DLIDFIS. The GSL-SE advance curve seems fine in all of them. I'm currently in the process of rebuilding another four port 13B that will get a 12A dizzy. The different curve ought to be ok.

Has anybody out there ever done a direct comparison swapping 12A and 13B distributors?
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Old Mar 13, 2004 | 07:23 PM
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From: Lost!
Jeff, what timing should I run on the 85 13B? My vac. advance is no longer hooked up?

Thanks, Ed
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Old Mar 13, 2004 | 11:55 PM
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See if it's at 0 leading at idle. Then rev it up to 4k and see how far iot advances. I usually aim for 20-24º I also adjust the trailing for 10º split.
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Old Mar 14, 2004 | 12:36 AM
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mazda says 5 degrees after tdc for the second gen, I think its for the GSL-SE too. But does running it at TDC yield better performance?
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Old Mar 14, 2004 | 05:37 AM
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Thanks!

Ed
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