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under construction

anyone looking to give advice ,show pictures of there projects in progress and hotrod tech ...

Location: middletown,ohio
Members: 1013
Latest Activity: Mar 16

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RWD Bonneville????

Started by walter young Oct 13, 2014.

89 caprice tbi help please 4 Replies

Started by jason deussen. Last reply by Keith Baumgarner May 18, 2014.

1946 Suburban

Started by Russell A. Sweet Jan 31, 2014.

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Comment by Hunt Joseph on December 18, 2014 at 7:15pm

Comment by Hunt Joseph on December 18, 2014 at 7:15pm

Comment by Hunt Joseph on December 18, 2014 at 7:14pm

Hey guys, I have not posted much in a while. I am just did the Dyno tuning on the Charger yesterday.It made 841 HP and 830 Torque to the wheels.I am still working on the hood when I get it done I will post pics 

Comment by Vall Miller on December 3, 2014 at 11:52am

 And you need to check your coil before removing the resistance, as the Pertronix or MSD both like 12v. to them, but not all coils have enough built in impedance to remove the resistor. If your coil doesn't have enough internal resistance, it will melt down if given a full 12v. input.

Comment by Vall Miller on December 3, 2014 at 11:49am

 I'm referring to spark output to the plugs, which isn't controlled or set by the distributor, but can be affected by coil output. The MSD 6A and 6AL both put out a very high voltage spark, which is magnified from whatever the coil puts out. The MSD box puts out between 520dcv-540dcv primary, and about 135-145 millijoules of spark output.

  That 2nd number and the multiple spark feature are the real keys to making an engine perform; especially in a engine set up for hi performance where often idle rpm create a rich situation, or suffer from a spark that's too cold at wide open throttle.

Comment by Red Barchetta on December 3, 2014 at 11:28am
as far as the voltage output, it's still all depends on your coil and how the points/control box, controls that coil. The 6a box sent 12 volts directly to the coil whereas your stock ignition usually has a resistor that limits the voltage. With the Pertronix, you have the option to remove the resistive wire thereby increasing the voltage to the full 12 volts just like the 6a box does, otherwise, it will have less output than the 6a.
Comment by Red Barchetta on December 1, 2014 at 10:27pm

I can get their Flame Thrower coil, paint it up stock Ford colors (Black with a yellow/mustard top), and remove the resistance wire to get the full 12v to the system. 

Remember I'm trying to keep things looking as stock/original as possible, as least to the casual observer. These Shelby American guys can tell with a glance if you dont have the right radiator cap, but its not them I am worried about. Not going to put it in a concourse show. But I do want to show it, after its had a few 11 to 12 second passes down the track. The motor in its stock version already did a mid 13 pass.

Comment by Vall Miller on December 1, 2014 at 10:06pm

The Pertronix is better than points, but it wont come near to the voltage output your 6a does! You can hide it under the dash, and get an extender plug to run wiring to the engine bay.

Comment by Red Barchetta on December 1, 2014 at 10:04pm

Yes, thats why its called MSD 6a, by MSD Ignition. But its a big red box that is hard to hide on a car you want to try to make look stock. The Pertronix 71281 Ignitor III Adaptive Dwell Control for Multiple Spark with Digital Rev Limiter all fits under the distributer cap, and only has one extra wire that goes to the positive side of the coil, along with the standard ground (black) that goes to the negative side. Put them both in a black heat shrink tube and a casual glance will not be very obvious that it is even there. Pertronix advertises for the Ignitor III: 

  • 5 times more spark energy than points
    ...increased burn time
  • Multi-spark thru the entire RPM range
    ...improved combustion
  • Increased spark energy
    ...More Horsepower & Better Mileage
  • REV limit set by user
    ...accurate to +/- 50 RPM

I currently only have the Ignitor II. No Multi-spark (aka MultipleSparkDischarge) , No REV Limiter. I'm just looking for the MultipleSparkDischarge/Multi-Spark though, with out the big red box.

Comment by Vall Miller on December 1, 2014 at 9:43pm

 Are you aware that your 6a box already does a multiple spark?

"

MULTIPLE SPARKS

The MSD produces full power multiple sparks for each firing of a plug. The number of multiple sparks that occur decreases as rpm increases, however the spark series always lasts for 20° of crankshaft rotation. Above 3,000 rpm there is simply not enough "time" to fire the spark plug more than once, so there is only one powerful spark."

 

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