what is the stock coil output for my 89 iroc 5.7? Can i find out the real voltage with my multimeter, if so how??? Whatis the significance of higher voltage and 1/4 mile times?? Is a MSD a worthy investment this early in my build-up? thnx in advance

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'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money

 

i don't know much about eletronics, but as i understand it and can explain it. the msd box allows the coil to "recharge" faster at higher rpms. at the higher speeds the coil doesn't have time to "recharge" and the msd box allows it to keep produceing a strong spark.

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-=ICON MOTORSPORTS=-
1st & 3rd

 

The MSD box increases Voltage and Current. This allows you to open up your spark plugs gap and burn the gases more completely. Besides, below 3000 RPMs, the box produces 4 sparks per plug each time it fires for better fuel economy; above that, one single very hot spark for power. If you wanna see how it works, disconnet one plug wire and lay it over metal and watch, but do not hold the wire or it will get you.
This one of those bolt on's (or plug in's) mods that won't have any negative effect on power, just positive on either stock or none stock (especially on modded engines).
Get one, you won't regrett it

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'88 GTA 350
Headers, catback, free mods, Xtreme energy cam, and intake pieces
13.51@104.27, but can run better as it is.

I just put a new 2100-2300 RPM TQ Converter. I hope a 13.20 or better

RAPTOR, the baddest bird on the planet
AIM HIGH!

 

Worthy at this time? Probably not, but if you keep modding your car it will pay dividends. Stock coil output? I'm not too sure but I think it's around 35,000-40,000 volts.

Ok, an MSD does not increase voltage/current. It stores apx. 470 volts in its capacitor and delivers this to the coil. It allows the coil to rapidly fire because of this. A conventional inductive system feeds the voltage to the coil, and the coil then has to step up the voltage and then fire once each event. An MSD bypasses this with its capacitors. It has capacitors that charge in less than one millisecond. Further, the amount of times the system fires the plug varies with the rpm. The higher the RPMs the fewer the sparks. It isn't 4 or 6 till 3,000 RPM as is usually quoted. Above the 3,000 RPM level, the spark is continuous for 20º crank rotation. On the Aftermarket Product Review board there is an MSD tech that answered a bunch of questions in a really long post for people with questions (and probably articulates it better). He may still be on there answering questions for people.

 

Well, MSD even recommends that you open up your plugs gap to take full advantage of the new boost in voltage and/or current.
Read below, from the MSD website:





MSD 6 Series Ignition Controls
Performance Benefits:

Improves power, quickens throttle response.
Smooths out idle and starting.
Reduces spark plug fouling.
Improves mileage and reduces emissions.


6 Series Ignition Technical Data:

All sparks, including each multiple spark, is 110 milliJoules of spark energy.
Steps up the primary voltage to 470 volts.
Spark series lasts for 20° of crankshaft rotation.
Operates at full power with a supply of 10 - 18 volts and will run down to 5 volts.
Cast aluminum housing and Humi-Seal coated circuits protect the electronics.
Can be triggered using points, electronic ignitions or magnetic pickups


------------------
'88 GTA 350
Headers, catback, free mods, Xtreme energy cam, and intake pieces
13.51@104.27, but can run better as it is.

I just put a new 2100-2300 RPM TQ Converter. I hope a 13.20 or better

RAPTOR, the baddest bird on the planet
AIM HIGH!