[s-cars] Coil Replacement Options?

[Joshua van Tol]

The time difference would be truly negligible. I think the advantage  
of separate coils is that at higher engine speeds, the individual  
coils have enough time to fully charge, resulting in a better spark.  
Also, it eliminates the possibility of the spark jumping to the wrong  
electrode, as often happens with the 3b engines at higher power levels.

Separate coils with wires should be every bit as good from a  
performance standpoint. The packaging isn't as neat, and there's  
undoubtedly more EMI to interfere with the radio as a result of the  
leads (read antennas) but the performance should (given equally good  
coils) be very similar.

That said, has anyone checked out the coils from late model fords?  
They're pretty neat, and could maybe be made to work. There's  
probably lots of them in the junk yards already.

On May 30, 2005, at 10:02 AM, Dave Forgie wrote:

> Mike:  Interesting thoughts on the GM (Corvette) coils.  However,  
> although the
> remote mounting would be cooler, I would wonder about the extra  
> time and
> resistance to get the charge from the coil to the sparkplug over  
> the longer
> distance.  This what I thought Audi was doing when they converted  
> the 20vt 3B to
> the AAN, i.e. got away from remote coils (okay, one coil in that  
> case) and the
> longer leads to the individual coils and the short spark plug  
> connectors.  This
> change (and maybe some ECU fiddling that it permitted), resulted in  
> 10 hp
> increase (217 to 227 SAE hp (220 to 230 DIN hp)).
>
> Dave F.
>
> mlp wrote:
>
>
>> I don't know the answer re the 1.8 /or 2.7 tt Audi coils, but I'm  
>> told FWIW
>> that some, at least one or more persons have been looking at a GM  
>> product
>> (the Corvette) coils as possible replacements.  This would entail
>> substituting spark plug wires for the plug boots, and remotely  
>> locating the
>> replacement coils else wheres in the engine compartment, as  
>> opposed to in
>> the head where they tend to get, and stay pretty hot.
>>
>> No word on when, if ever this proposed solution may actually be  
>> implemented.
>> But I am, as we speak, sitting with one car without a good set of  
>> coils
>> waiting for an answer.
>>
>> HTH
>> Mike
>>
>>
>>> -----Original Message-----
>>> From: s-car-list- On Behalf Of Dave Forgie
>>>
>>
>>
>>> S-gruppees:  I have posted this same question at least once
>>> before.  The question is whether it would be possible (and
>>> cheaper (??)) to replace our coils with those from say a 2.7tt
>>> or 1.8t.
>>>
>>
>>
>>> Dave F.
>>>
>>>
>
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