<VV> Aftermarket Coils Re: follow-up on bogging down, sputtering

[Test User]

frank-disagree. the allison coil which i'm replacing with a msd both use
ballast resistors. msd uses a .8 one while the allison was more. both are
45,000 volt coils-mike mann

On Mon, Aug 17, 2009 at 6:13 PM, FrankCB <frankcb at aol.com> wrote:

> Dennis,
>     I agree that the stock coil should be good enough for the stock
> (unmodified) engine. Most of the aftermarket coils are lower resistance than
> the stock coil and therefore will TRY to flow higher-than-stock current but
> ONLY if they have a full 12 to 14 volts present at the positive terminal.
>  This higher current can cause significant voltage drop especially if the
> stock resistance wire is not eliminated.  Even if the resistance wire is
> bypassed, the higher current through the stock wire from the back of the car
> to the front, through the old ignition switch and returning back to the
> engine can cause significant voltage drop so that the voltage at the coil +
> terminal is much less than 12 volts.  The coil is really a transformer so it
> multiplies the voltage in the primary to make a much higher voltage in the
> secondary that ignites the combustion through the plugs.  But if the primary
> voltage at the coil + terminal is way below 12 volts (due to excessive drop)
> then it's possib
>  le the sparking voltage may actually be BELOW the normal STOCK sparking
> voltage from the stock coil.  So it's important to make sure you have the
> correct voltage at the coil when the engine is running no matter what coil
> you are using..
>     Frank "sparky" Burkhard
>
>
>
> In a message dated 08/17/09 16:25:42 Eastern Daylight Time,
> dpleau at wavecable.com writes:
> I went through three aftermarket coils in a short period of time.  One
> Pertronics and two Accel before I went back to the original.  All had the
> exact symptoms Ernie had.  That's why I suggested his problems was the
> coil.
> All three had the right resistance both before and after they started
> causing problems and they were hooked up properly.
>
> Dennis
>
> -----Original Message-----
> From: virtualvairs-bounces at corvair.org
> [mailto:virtualvairs-bounces at corvair.org] On Behalf Of John O'Shea
> Sent: Monday, August 17, 2009 1:15 PM
> To: Virtual Vairs
> Subject: Re: <VV> follow-up on bogging down, sputtering
>
> Finding the "good quality aftermarket coil" may turn out to be just as much
> of a crapshoot as the stock types.
> I know of several Corvair folks who have installed the "high output"
> expensive aftermarket coil and they found out two things:
> 1. On anything short of a serious race engine there's no improvement in
> performance.
> 2. Reliability of the expensive aftermarket coils is equal to or worse than
> stock coils.
> BTW, an article in one of Bob Helt's books thoroughly debunks the urban
> myth
>
> that your stock (or near stock) Corvair engine
> will run better with a high output coil.
>
> Turn flame on here, but please spare the group anecdotal "evidence" and
> "facts".
>  _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are
> the property
> of the writer, please attribute properly. For help, mailto:
> vv-help at corvair.org
> This list sponsored by the Corvair Society of America,
> http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options:
> http://www.vv.corvair.org/mailman/options/virtualvairs
>  _______________________________________________
>