Which Spark plug? Mexican ACD engine with MegaSquirt

[lner JP]

As the title say's can anyone help with which sparkplugs I need, usual W8DRC or BP5ES-A, but with the Meagspark need a resistor and precious metal plug due to wasted spark.

Evey Website I visit just wants me to enter my reg number and they will advise on the correct plug, obviously not going to work well with a 52 year old car.

Cheers
JP
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Stock 1973 GT Beetle in Apple Green

[Wreck]

The ACD should have 3/4" reach plugs in 043 heads .
I'm using Bosch FR7DTC , just a resistor copper tri electrode plug . Speeduino sequential with chev LS1 coils .
They have a 5/8's hex with will make it easier to remove and replace .

[celtune]

As Wreck wrote Sparkplugs with 5/8" (16mm) hex are much easier to handle.

NGK BCPR5EIX or BCPR5EIX-11 (same with 1.1mm gap) is the 16-hex Iridium Resistor Plug for your BP5ES-A or BPR5EIX if you want to stay with the bigger 21mm hex.

[lner JP]

Thanks guys, I thought that would be easily sorted.

1.1mm is a big gap for a VW?
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Stock 1973 GT Beetle in Apple Green

[mikedjames]

I run exactly the same stock Bosch plugs in my bus with EDIS wasted spark ignition as for a stock ignitiion. Stock gap.. I just left them in there when I switched over. A check after about 12000 miles shows them still OK . Havent changed plugs for a few years.

Leads are Taylor Spiro Pro equivalent. Again the same as I was running on the stock ignition.
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Ancient vehicles and vessels

1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.

1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy