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Would any one on here now if this distributor runs as a stand-alone unit, or is it controlled via an ecu? It’s off a W123 (I don’t even know what that means). My brother is looking for a distributor to run with carbs on a Mercedes 2.3 16v Cosworth engine. He just wants something that is plug and play as he doesn’t want the complications of the standard ecu driven distributor. Thanks
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madmog
Club Retro Rides Member
Posts: 1,153
Club RR Member Number: 46
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According to the part number that's a distributor for the Mercedes 4 cylinder 2.3 M102 engine . I can see it has a vacuum line but can't see if it is running points or not. If it has a set of points it doesn't need a module, if it's some contactless setup it does need a module. But the ignition curve may be different between the sohc M102 and the Cosworth headed variant. Here's a link to a cheap 2nd hand one. The supplier, 3 pointed parts will probably be able to advise as to suitability. No connection to me. www.ebay.co.uk/itm/MERCEDES-W124-IGNITION-DISTRIBUTOR-0031583101/312601433454?epid=1213889994
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tofufi
South West
Posts: 1,452
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Looking at the one in the OPs post, it looks very similar to the one fitted to a friend's 500SEL (except the wrong number of cylinders, obviously). It is not a points distributor. The 500SEL has the same green lead/wiring plug, and has an ignition module. Something like this: www.ebay.co.uk/itm/292228788825From memory, that ignition module only has 4 connections to it - +ve, -ve, a wire to the coil, and one other one I don't recall what it does. The green lead goes from it to the distributor, with a plug similar to a radio aerial, and nothing else. The 500SEL has K-Jet and no computer controlling the fuelling, so the ignition should be a standalone setup. I think it'd be easy enough to make it run as a standalone distributor for carbs with the correct ignition pack. Certainly worth looking into for the improved reliability over points/condensor IMO.
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Last Edit: Jan 7, 2020 18:02:07 GMT by tofufi
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Would any one on here now if this distributor runs as a stand-alone unit, or is it controlled via an ecu? It’s off a W123 (I don’t even know what that means). My brother is looking for a distributor to run with carbs on a Mercedes 2.3 16v Cosworth engine. He just wants something that is plug and play as he doesn’t want the complications of the standard ecu driven distributor. Thanks I can't really comment on that particular distributor but you can bet you're bottom dollar it's not suitable for a high reving, twin cam, big valve M102 . i.e the 2.3-16. As a side note, he'd be 100% better off saving up and fitting a standalone injection/timing system (even better with throttle bodies) , carbs and a mech distributor are not really ideal for an engine designed to run with fuel injection.
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Last Edit: Jan 7, 2020 21:29:58 GMT by Woofwoof
Still learning...still spending...still breaking things!
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Jan 12, 2020 19:15:13 GMT
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Thanks everyone. I have been messaging the ebay seller mentioned and it looks like it will get the engine running. The module he says goes with it does have a built in rev limiter of 6200rpm which is a bit of a bummer but maybe there is a similar one without the limiter
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Jan 12, 2020 20:34:00 GMT
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Thanks everyone. I have been messaging the ebay seller mentioned and it looks like it will get the engine running. The module he says goes with it does have a built in rev limiter of 6200rpm which is a bit of a bummer but maybe there is a similar one without the limiter That's no good for what you want to do. Any reason you cant use the original setup from the 16v?
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1988 Mercedes w124 superturbo diesel 508hp 1996 Mercedes s124 e300 diesel wagon 1990 BMW E30 V8 M60 powered! 1999 BMW E46 323ci project car
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Jan 12, 2020 22:07:44 GMT
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The original distributor is empty, other than a rotor arm. The whole ignition is run from an ecu that my brother does not want to fit. When it comes to electrics a 13A plug is pushing his capabilities. With it being a rally car you want to have readily available spares. I’ve tried to convince him to use Nodiz or similar but have not succeeded yet
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Last Edit: Jan 12, 2020 22:08:23 GMT by jonsey
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Jan 12, 2020 22:16:27 GMT
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Nodix is £250, that incorrect distributor is £190...need I say more?
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Still learning...still spending...still breaking things!
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The original distributor is empty, other than a rotor arm. The whole ignition is run from an ecu that my brother does not want to fit. When it comes to electrics a 13A plug is pushing his capabilities. With it being a rally car you want to have readily available spares. I’ve tried to convince him to use Nodiz or similar but have not succeeded yet Unfortunately you've only got two options, as even if you get it to fire up on an old m102 dizzy the characteristics will be way wrong for the 16v. The original ignition system doesn't use the main ecu, it is all done via the ignition module and it's self contained circuits. The wiring for this is actually fairly simple, and spares are easy to get. This setup has been used many times when the engine is running bike carbs. The better option as Jhon pointed out is to use an aftermarket ignition setup, which can be fine tuned to suit your engine.
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1988 Mercedes w124 superturbo diesel 508hp 1996 Mercedes s124 e300 diesel wagon 1990 BMW E30 V8 M60 powered! 1999 BMW E46 323ci project car
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ChasR
RR Helper
motivation
Posts: 10,191
Club RR Member Number: 170
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Jan 13, 2020 19:29:36 GMT
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FWIW, a friend of mine where his car had a similar thing done is now onto engine rebuild no 2 on his car.
For the record, his car was a Nissan DR30 Skyline RS. It went from EFI to carbs. In short, on a set of Dellortos, it overfuelled and killed his engine from bore glazing, and that was despite having the car setup from a well-known East Midlands tuning outfit.
For that reason alone, I'd go EFI with the stock dizzy to run that.
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Jan 13, 2020 19:44:05 GMT
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being a rally car the reliability of a DTA S40 on a set of bodies is hard to beat, fit, get it mapped, forget about it.
good enough for £30k+ Millington engines.
on top of that, get it mapped by someone that knows their stuff (my go to is sandy brown in cornwall) it'll make more power and torque than carbs, and also use less fuel, run cleaner and last longer between rebuilds.
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Jan 15, 2020 19:45:37 GMT
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Thanks everyone for their input. He has ordered H&H distributor with the advanced curve modified for the carbs. It can be sent back and adjusted if further mods are made.
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Jan 26, 2020 20:50:59 GMT
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I'm late to the party! Havent logged in for ages. That dizzy cap pictured is standard on the older 4 cylinder mercs. The green cable is actually the crank angle sensor for the ezl module (ignition module)
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ClassicResto.co.uk - Restoration and maintenance of classic cars - Wolverhampton.
2002 Mercedes E320CDI Estate 1998 Mercedes C240 Sport 1995 Mercedes SL500 1993 Mercedes 500 SEL 1993 Mercedes 500SL - Sold October 2022 1989 Mercedes 300 CE 1985 Mercedes 500 SEC 1985 Porsche 911 Carrera - Sold March 2022 1983 Porshe 944 1978 BMW 1602 1973 Mercedes 350SL
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