nissan ecu conversion. - Page 2 - Alfa Romeo Bulletin Board & Forums
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post #16 of 32 (permalink) Old 05-12-2011, 05:17 PM
Duk
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Yes.
Distributors still work OK, but if you want or need some big zapping power, look at using a Capacitive Discharge Ignition system with the distributors (you'll need 1 for each coil, tho or a dual output 1). But that is the sort of thing for later when you start chasing those last few KW.

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post #17 of 32 (permalink) Old 05-12-2011, 11:44 PM Thread Starter
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thanks duk,
just wondering how the ecu would control the timing with a dizzy?
if its possible to use a dizzy, then i will use the bosch alfetta dizzy with its advance locked off, and mounted on the block, then use a nissan pintara rotor and cap to give me 8 spark plug outputs. however i will need an extra coil pack (will use the original TS ones for now) do the coil packs need to commincate with the ecu or can these just be set up to get power when the ignition is turned on??
cheers,
Brad

79 GTV Sr20-Track/Drift ~ 83 GTV6 3ltr 24v-Street ~ 83 GTV-Street ~ 76 GT,75TS x 3,164,85 GTV,S13 silvia-Parts cars ~ VT SS Ls1 6spd-Track ~ e30 318i 2dr-Daily
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post #18 of 32 (permalink) Old 05-15-2011, 02:46 AM
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the idea with the two dizzys integrated should work as i think thats how mine works.

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post #19 of 32 (permalink) Old 05-15-2011, 02:48 AM
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also you should see if you can find one of these for an alfa Mercedes Bosch Electronic Distributor 4 Cyl New (eBay item 200555702485 end time 16-May-11 03:25:37 AEST) : eBay Motors.

I also was going to bid on that ECU off the fiat.

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post #20 of 32 (permalink) Old 05-15-2011, 02:52 AM Thread Starter
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thanks for the suggestion, but i dont see how that will benefit me at all??

how urs work? i didnt know you had a ts running?

i plan to use an afletta dizzy, weld the advance mechanisms, then modify it to fit the nissn rotor and cap. simple and it will work.

79 GTV Sr20-Track/Drift ~ 83 GTV6 3ltr 24v-Street ~ 83 GTV-Street ~ 76 GT,75TS x 3,164,85 GTV,S13 silvia-Parts cars ~ VT SS Ls1 6spd-Track ~ e30 318i 2dr-Daily
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post #21 of 32 (permalink) Old 05-15-2011, 02:55 AM
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wait here it is
Citroen Alfa Ducellier Electronic Distributor 4 Cyl New | eBay

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post #22 of 32 (permalink) Old 05-15-2011, 02:59 AM Thread Starter
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that will not help me, what i see there is a distributer that can have its timming controled by a computer, thats excatly what im doing and it will cost me nothing to modify mine

79 GTV Sr20-Track/Drift ~ 83 GTV6 3ltr 24v-Street ~ 83 GTV-Street ~ 76 GT,75TS x 3,164,85 GTV,S13 silvia-Parts cars ~ VT SS Ls1 6spd-Track ~ e30 318i 2dr-Daily

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post #23 of 32 (permalink) Old 05-15-2011, 03:01 AM Thread Starter
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and my ecu can control both fuel and ignition, having them seperate isnt a very good solution

79 GTV Sr20-Track/Drift ~ 83 GTV6 3ltr 24v-Street ~ 83 GTV-Street ~ 76 GT,75TS x 3,164,85 GTV,S13 silvia-Parts cars ~ VT SS Ls1 6spd-Track ~ e30 318i 2dr-Daily
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post #24 of 32 (permalink) Old 05-15-2011, 03:13 AM
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wait here it is
Citroen Alfa Ducellier Electronic Distributor 4 Cyl New | eBay

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post #25 of 32 (permalink) Old 05-15-2011, 03:15 AM
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not on a TS but my nord the bottom half if alfa ofcourse but the top half seems to be a modified top from another car with the boost retard

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post #26 of 32 (permalink) Old 05-15-2011, 03:21 AM
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not on a TS but my nord the bottom half if alfa ofcourse but the top half seems to be a modified top from another car with the boost retard

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post #27 of 32 (permalink) Old 05-15-2011, 03:21 AM
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sorry my computer is laging up

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post #28 of 32 (permalink) Old 05-22-2011, 05:06 AM
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can you just control the main dizzy through the ecu using 4 coils to the main 1st spark, and then just leaving the 2nd dizzy/CAS standard ? as the 2nd spark just runs off the cams and i assume it doesn't need the power unlike the main spark.

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post #29 of 32 (permalink) Old 05-22-2011, 03:05 PM Thread Starter
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what you are saying is to keep the motronic ecu as well, too complicated and both spark plugs need to be fired at the same time and the same strenght spark. my micortech cannont use the motronic CAS unless i send it back to microtech to be reconfigured which will cost me fair amount of money.

as i said i will use an alfetta dizzy, locked, with the nissan rotor and cap. in theory this will work well. i just need to know if the x2 coil packs required to fire the nissan cap need to communicate with the ecu? or can be standard bosch gt40s wired like normal (power and earth from ignition) ?? and i still have control over my ignition timming?

79 GTV Sr20-Track/Drift ~ 83 GTV6 3ltr 24v-Street ~ 83 GTV-Street ~ 76 GT,75TS x 3,164,85 GTV,S13 silvia-Parts cars ~ VT SS Ls1 6spd-Track ~ e30 318i 2dr-Daily
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post #30 of 32 (permalink) Old 05-23-2011, 01:40 AM
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There is nothing to stop you from using the Alfetta distributor on the driver side of the engine and the factory exhaust cam driven distributor. The Alfetta distributor triggers the ECU to fire the 2 ignition modules and they switch the 2 coils. The original Motronic system works in a similar way except that it uses the crank angle sensor to determine where the engine is and the distributor(s) do nothing other than point the high tension voltage toward the correct spark plug(s) and have no effect on the ignition timing.

Just make sure the exhaust cam driven distributor is set so that the rotor button is in contact with the correct spark plug post regardless of what ignition timing the ECU is sending out. That is, if the ECU uses say 20* from the lowest advance angle (say 20* BTDC) to its highest advance angle (say 40* BTDC) that the rotor button is always in contact with the correct spark plug post.

*Note that the exhaust cam driven distributor does not have any effect on the base ignition timing of the spark that it directs, that is set by the driver's side distributor.

Slowly Progressing Vortech Supercharged 1990 Alfa Romeo 75 Potenziata. Out of Action Twin-Charged 1988 AW11 MR2. Current Daily Driver, The Glorified Taxi 2006 BF FPV F6 Typhoon.

Last edited by Duk; 05-23-2011 at 01:44 AM.
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