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electromotive ignition settings on 1983 930

was wondering what you guys are setting your ignition timing at: intial
3000rpm
8000rpm
rev limiter
with an electromive system. engine is 3.3ltr. headers b&b exhaust, .8bar boost, k27, running on 93 octane fuel. any info would be greatly appreciated. mick
Old 12-08-2009, 06:34 PM
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Mine is an '89, double plug, 964 cams, Carillo rods, RarlyL8, K27S, tuned at 1.0 bar then backed down to .8 and it was set at: plus 5 at initial, +24 at 3000, -6 at 8000 overrev at 7500. Hope this helps.

Roger B.
Old 12-09-2009, 01:03 PM
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that's what i was looking for. mine was set at 12 intial +25 at 3000 -2 at 8000 7000 rev limit. any problems with these number and my engine configuration? 1983 row 3.3ltr .8bar b&b exhaust k27, koklen intercooler, k&n intake. otherwise stock injection and so forth.
Old 12-09-2009, 01:44 PM
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Are you using the optional MAP sensor for boost retard?

If you are, that takes a slightly different setup.
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1986 911 Turbo
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Old 12-09-2009, 01:55 PM
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no map sensor. any problems with the settings i have now?
Old 12-09-2009, 01:57 PM
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Quote:
Originally Posted by mickster8888 View Post
no map sensor. any problems with the settings i have now?


Stephen Kaspar posted these settings awhile back as a general starting point:

12 BTDC initial
22-23 @ 3000
18 @ 6800

Seems to agree with a few other settings around, and close to your original setup. With a stock, low compression 3.3L, it'll take quite a bit of timing before the onset of boost. Play with the initial and 3000 points until it runs the best.

You need to read this thread for all the pros and cons:

Ultimate 930 Distributor, advance, retard, timing, Turbo lag, MSD, mod, thread.
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Old 12-09-2009, 02:33 PM
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anyone else using the elecrtomotive ignition system that can share their settings?
Old 12-09-2009, 04:40 PM
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I am running a XDI system -w- twin plug. What system are you running? You can try my settings if you would like, although my system uses a map sensor and the settings may be a little different. When the system was first installed my mechanic must not have understood the settings very well and the car ran like sh**. Must have overlooked the fact that the system had 7* built in and was waaaay over advanced. Not knowing allot about timing I finally called Clewitt where the system was purchased and reset it to their recommendations and the car runs great now but it took until the end of the year and the car is nestled in till spring.I learned a lesson there , always double check things no matter how competent the wrench is.If in doubt call the manufacturer assuming they know and understand the model of car you have.The more mods you have the more you need to know and understand. I do everything to my car that I can but sometimes I need some help. I also realized that most people know 'stock' cars or slightly modded and know very little about the aftermarket accessories so its up to you to do your homework and DOUBLE CHECK . This board has been invaluable!! I didn't mean to go off on a rant but this is the reality.I am not under rating the mechanic I was using , he is very knowledgeable in Porsches in general just overlooked an important point in the installation of an aftermarket part that could have cost me a bunch of $$$$$$.
Old 12-10-2009, 09:45 AM
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i'm running single plug heads with the hpv1 system. did some research and found that most guys don't going over 30 degrees on full boost. if my intial setting is 12 degrees and my 3000 is 22 degrees which gives 34 dgrees total advance then my 8000 setting should be -4 to retard the total back to 30 degrees. is my thinking correct? of course this is with the electromotive hpv1 direct ignition for a 3.3ltre .8bar boost on 93 octane gas.
Old 12-11-2009, 03:53 PM
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Not sure where you got that, but most don't go over 20 degrees total under full boost. A good reason for using the optional MAP for boost retard. You set the unboosted timing curve, then let the MAP retard it as the boost builds.

Read the long thread I posted the link to. Every engines timing demands are slightly different, so what may work for others might not work for you. Even worse, you may reach detonation and seriously damaged your engine if you randomly set the timing.
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Old 12-11-2009, 04:16 PM
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WinRice-Thanks for the very valuable information-indeed, every engine is set up differently!

Roger B.
Old 12-12-2009, 09:03 AM
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with the single plug electromotive hpx I'm running 10 initial, 18 3000-8000 and -4 at 8000 for 28 total advance. man it's cold outside...
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Old 12-12-2009, 09:25 AM
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thanks slyguy. seems consistent with what mine.
Old 12-13-2009, 09:12 AM
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Some points of reference and thoughts:

US 930's stock on boost max seems to be around -16 or -17.

Euro 930's stock on boost max seems to be around -19 or -20 (better fuel).

The 91 Turbo spec on boost max (.75 bar) is -21 +/- 3 deg depending on intake temp.

These are all for .8 bar. I belive 1 bar requires one point or more total advance though most seem fine at 1 bar using the factory settngs.

These might or might not be conservative settings depending on boost, build and fuel run. Intercooler & turbo effecency and AFR's may be significant factors.

A twin plug may or may not require less timing on boost than a single plug but not sure how much if any difference. It may be that the high effective compression ratio that comes with boost makes single and twin plug burn rates close to the same on boost.

One thing for sure, a twin plug should not take more advance than a single plug on boost.

Pre-boost twin plug runs less timing than single plug.

Best to set it up on a dyno that can hold different levels of rpm at full load to test for ideals and pull it back some for safety depending on environmental conditions and changes in AFR's.

At low load under cruse a 930 can take around -40 or more but it has to be pulled back quickly with acceleration. Stock 930's run -26 on cruse for US and -29 or Euro but that is more a limitation of a mechanical system. More advance on cruse can translate to more MPG and cooler temps.

Last edited by 911st; 12-13-2009 at 12:34 PM..
Old 12-13-2009, 12:30 PM
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