Ignition Coils

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DB RX63
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Joined: Mon Apr 02, 2012 10:52 pm
Location: South East UK

Ignition Coils

Post by DB RX63 » Wed Jul 25, 2012 9:50 pm

Chaps,

Another daft question from me, which I know you have come to expect !

OK, here goes, can I use any type of ignition coil on my S3 ?

i.e like these :http://www.demon-tweeks.co.uk/performan ... 84/2-3-1-1

Or are they a particular spec?

Tool will know..............

Cheers

DB
Met Blue Series 2 Elford Turbo
S3 Rally Car (under Construction - Nearly Finished !)

RamoNZ
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Location: Auckland, New Zealand

Re: Ignition Coils

Post by RamoNZ » Wed Jul 25, 2012 10:12 pm

Anyone will do, without ballast resistor.

I would fit an FC coil pack myself and run waste spark on the leading plugs. I'm going to convert the RX2 to it but can't really do a write up until then, but plenty info on the net. Look for DFIS or direct fire ignition system. The diz just becomes the trigger to fire both terminals of the FC coil pack for both leading plugs And completely bypassing the diz and rotor arm which are subject to wear and an air gap etc - one rotor will be on the power stroke and the other acts like a third spark in the exhausting/other rotor chamber. win win all round.

You can then run one of these for the trailing, but not really worth it unless both originals are buggered.

*Edited to actually give a reason why you might do this :)
Series 3 13b EGi 6 port, Tender Blue
Series 2 12a stock, Silver
Series 1 RX2 12a, Herschel Orange

TOOL
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Location: Var, France (ex NZ, ex UK)

Re: Ignition Coils

Post by TOOL » Wed Jul 25, 2012 10:47 pm

What Ramondo said.

What's wrong with the Mazda ones? They're good units.
Back in sunny France

TOOL
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Location: Var, France (ex NZ, ex UK)

Re: Ignition Coils

Post by TOOL » Thu Jul 26, 2012 9:35 am

Oh yeah, thanks for the vote of confidence, but Ramon and Tim are much better with leccy stuff.

I'm hopeless. :oops:
Back in sunny France

DB RX63
Posts: 705
Joined: Mon Apr 02, 2012 10:52 pm
Location: South East UK

Re: Ignition Coils

Post by DB RX63 » Thu Jul 26, 2012 10:13 pm

Ramon,

You lost me I am a simple bloke.........

I am just looking at working my way through various things to update/replace and I was checking that a "standard" coil would be ok. You never know with a Mazda........
Met Blue Series 2 Elford Turbo
S3 Rally Car (under Construction - Nearly Finished !)

TOOL
Posts: 2514
Joined: Thu Sep 01, 2011 10:30 am
Location: Var, France (ex NZ, ex UK)

Re: Ignition Coils

Post by TOOL » Thu Jul 26, 2012 10:27 pm

Search on Ausrotary. Lots of info on it there.

DFI ignition. FC coils are the upgrade part.
Back in sunny France

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ian65
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Re: Ignition Coils

Post by ian65 » Fri Jul 27, 2012 5:59 am

standard second hand fb coils are plentiful..... I've got about half a dozen lying about and 1st gens are being broken on a pretty regular basis nationally so getting a coil shouldn't be a problem if you ever need one
1986 Series 3 13B Turbo II
http://rx7fb.com/viewtopic.php?f=2&t=2400
1992 Peugeot 205 1.9 GTI
1975 Honda SL125 Street Scrambler

codge
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Joined: Fri Apr 01, 2011 11:41 am
Location: South Yorks.

Re: Ignition Coils

Post by codge » Sat Jul 28, 2012 12:09 pm

Must be the most reliable piece of kit on any car.....that and the old points capacitor. The car shops used to say 'change this capacitor to protect against failure' But they never failed on me. A bit like PPI mis-selling......can we claim anything back after a zillion years?

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kenwhiteside
Posts: 166
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Location: Hove

Re: Ignition Coils

Post by kenwhiteside » Fri Aug 31, 2012 2:21 pm

Can you run wasted spark on a rotary?

On at standard piston engine you would be sparking on the exhaust stroke therby burning any residues. Surely on a rotary engine as the rotors are out of phase you would be sparking when the point of the rotor was inbetween the two plugs. Is this a good idea? Probably burns up some of the trailing unbrunt gases i guess?

Lucky
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Location: Worthing, UK

Re: Ignition Coils

Post by Lucky » Fri Aug 31, 2012 3:05 pm

They are wasted spark aren't they? :?


EDIT: at least, FDs are. I have to admit I haven't looked too far into the mysteries of the FB ignition system, mainly cos it hasn't gone wrong. Yet :lol:

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