Author Topic: alfetta coils  (Read 2362 times)

0 Members and 1 Guest are viewing this topic.

carlo rossi

  • Hero Member
  • *****
  • Posts: 730
  • AROCA Member #: 8733
alfetta coils
« on: February 19, 2021, 04:54:28 PM »
i didnt realise that there are so many versions of ignition coils out there ,with resistor,without ,for points etc
what is the best for a 2.0 alfetta with bosch electronic distributor?
help
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

Colin Edwards

  • Hero Member
  • *****
  • Posts: 721
  • AROCA Member #: 5065
Re: alfetta coils
« Reply #1 on: February 19, 2021, 08:18:00 PM »
I had a look at my 75 workshop manual - Section 05 pages 11 and 12.   It has info on the Alfetta and the Giulietta.
Looks like the Bosch coil for the 2.0L engine with the BOSCH "electronic module" is a 0.221.500.002.  The Alfa Romeo part number could be 116.97.65.079.00.
The PO of my 75 fitted one of those BOSCH GT40 coils - what a disaster.  The correct coil is critical. 

Colin
Present
2020 Giulietta Veloce
2018 Abarth 124 Spider
1987 75 3.0

Past
2015 Giulietta QV
2009 159 3.2 Ti Q4
2012 Giulietta TCT Veloce
2006 147 Ti 2 door Selespeed
1979 Alfasud Ti 1.5

carlo rossi

  • Hero Member
  • *****
  • Posts: 730
  • AROCA Member #: 8733
Re: alfetta coils
« Reply #2 on: March 31, 2021, 03:21:40 PM »
thanks for the help
after alot of research found out the following
later models have no external ballast so they use a 12v coil like a GT40
BUT as the car gets older the solenoid on the starter sucks up alot and lower this to an effective 7volts ( only on start up)
so the car becomes a pig to start 
earlier models have a 12 volt coil with ballast so at start up the key bypasses the ballast so at start up it gets the full 12volts to the coil and then as it runs it drops down to 9volts to keep the coil cool and for longevity
I as usual are running the gauntlet i have always had issues starting the beast particularly if laid up for more than 4 weeks
so i have put the ballast coil in with no ballast so she runs the full 12 volt all the time
i keep a spare in the boot
results : fantastic, better spark more go, no sooty plugs
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

Alfapride

  • Sr. Member
  • ****
  • Posts: 394
Re: alfetta coils
« Reply #3 on: April 03, 2021, 11:15:52 AM »
I checked the coil on my Alfetta gtv 1984 which I think has original coil and it reads 0.221.600.002 it has the electronic ignition - do you think the gt40 coil will be a suitable replacement?
Alfa 33 16v
Alfa 116 Giulietta
Alfa 116 Alfetta GTV
Alfa MY2004 147 TI
Alfa MY19 Giulia Veloce

carlo rossi

  • Hero Member
  • *****
  • Posts: 730
  • AROCA Member #: 8733
Re: alfetta coils
« Reply #4 on: April 04, 2021, 09:54:23 AM »
Same as mine fits perfectly
The r series  run at a lower voltage are primarily to save the points from burning
So electronic ignition loves the ful 12 volts
Go the gt 40 not the the gt40 r
« Last Edit: April 04, 2021, 09:58:06 AM by carlo rossi »
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

Alfapride

  • Sr. Member
  • ****
  • Posts: 394
Re: alfetta coils
« Reply #5 on: April 04, 2021, 05:14:22 PM »
Thanks will give it a go
Alfa 33 16v
Alfa 116 Giulietta
Alfa 116 Alfetta GTV
Alfa MY2004 147 TI
Alfa MY19 Giulia Veloce