Motronic, Carbs or Aftermarket EFI - Alfa Romeo Bulletin Board & Forums
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post #1 of 9 (permalink) Old 04-18-2014, 03:06 PM Thread Starter
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Motronic, Carbs or Aftermarket EFI

My 66 GTV has a twin spark installed, complete with standard motronic and air plenum.

I recently installed a squadra tuning chip which seemed quite worthwhile, with better drivability.

However, the large standard air plenum is starting to offend ,me, there is marginal access to the fusebox, and despite adjusting it still hits the wing a little. The inner wing was slightly modified by the previous owner to accommodate this.

Anyway, clearly the best way is to go for ITB's and aftermarket engine management.

However, this would seem to cost the thick end of 4000 to do properly.

I keep on telling myself that carbs would be a step back, but in reality, will they?

I love the throttle response of other carb cars I have driven, and I know that they will sound better than the stock setup.

If I go for mapped ignition then its seems like for circa 2K I can have a clean, neat and nice sounding installation?I do like the idea of going to coil packs and away from the single dizzy I currently run.

Presumably MPG would be not quite as good, but I could live with that.

At the moment the engine runs standard VVT intake cam, and has no mods apart from the alfaholics exhaust system.

If I go carbs, does it have to be 45's for a stock engine? I have the original 1600 engine 40's, which I could get rebuilt and re-jetted.

This is a very common engine swap, can people share their experiences as to what works best??

Angus
1966 Giulia Sprint GT Veloce- Twin Spark Converted
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post #2 of 9 (permalink) Old 04-20-2014, 07:38 AM
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Here's an ecu for under 1000 pounds. It's from your country too. It will do twin spark and VVT. I have the earlier version. Tell em you have a twin spark from a 75 (not the wasted spark) and they'll send you the right one. They know the different kinds of twin sparks.

ECUs & conversion kits

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post #3 of 9 (permalink) Old 04-21-2014, 07:24 PM
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Garage
You might also want to check the custom-engineered solution that Alfaholics offers.

It's more expensive, but is designed specifically for the Alfa twin-spark and the throttle bodies even have a carburetor-ish look to them.

1968 Euro-spec 1750 GTV (still under restoration)
1973 2000 Spider
1979 Alfetta Sprint Veloce
2017 Giulia ti Q4
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post #4 of 9 (permalink) Old 04-22-2014, 06:20 AM Thread Starter
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Thanks for the replies guys, I respect Emerald, I think do they do products at sensible prices. I often Read Dave Walker's magazine column.

I have the alfaholics page bookmarked, been looking at that for a while. looks nice, particularly the wiring loom.

It does come to 3000 though, and I would still need the inlet manifold, air filter and a few other bits and pieces.

As far as I know, the throttle bodies are nothing special, just short body jenvey as can be bought from Emerald and other suppliers.

AHM also do a kit;

Parts

Angus
1966 Giulia Sprint GT Veloce- Twin Spark Converted
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post #5 of 9 (permalink) Old 05-14-2014, 05:19 AM
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Complete electromotive

If you have time, keep waiting and the brains will show up. I bought a V8 electromotive system complete, all coils, TEC3R with all the minor parts for $1326 May 2013. A racer went another way which was perfect for me. But you will still need throttle bodies, intake, exhaust manifold and what Brits call a rolling road to tune it up.

So it adds up, but you can defray if you have time to accumulate deals

I also bought my AHM intake for $200 out of Greece. Jim Steck made my exhaust but Alfaholics has the total system in stainless as another great choice.

Consider the time and expense involved. I know one or two that have thrown in the towel and just gone back to stock, because it is a big time and money investment. It's an exclusive club of twin spark "conversion-istas" because of that. But exclusive club in a nice way, not snobbish.
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post #6 of 9 (permalink) Old 05-14-2014, 05:48 AM
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I found this in a few minutes.

EMERALD ECU JENVEY THROTTLE BODIES LOOM COIL PACK WEBER DCOE QED | eBay

Drive over to Nottingham and say hello to Robin and the Sheriff for me!
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post #7 of 9 (permalink) Old 05-14-2014, 11:06 AM Thread Starter
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Exciting news! I have just ordered all the bits direct from OMEX, well, through a local dealer with a little more discount. Similar to the alfaholics kit but with a few extras.

The dealer is less than half an hour away and has a good reputation for mapping, and I can also phone them and Omex direct for advice when fitting.

I'll start a new thread when the shiny new bits arrive!
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Angus
1966 Giulia Sprint GT Veloce- Twin Spark Converted
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post #8 of 9 (permalink) Old 05-14-2014, 11:15 AM
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Link it to this post after you start it, please.

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post #9 of 9 (permalink) Old 07-28-2014, 11:35 AM Thread Starter
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Quote:
Originally Posted by iachella View Post
Link it to this post after you start it, please.
Here is the long overdue link;

http://www.alfabb.com/bb/forums/gt-1...ml#post5600602

Angus
1966 Giulia Sprint GT Veloce- Twin Spark Converted
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