msd ignition
Post Fiend
Joined: Apr 2002
Posts: 5,438
Likes: 11
From: IN FRONT OF YOU
msd ignition
MSD ignitions are a capactive discharge, and stock units are inductive. MSD can produce high power sparks throughout the rpm range and draws power directly from the battery and uses a custom transformer. A stock unit does two jobs, it is set up like a step up transformer and also must store power until the ignition is triggered resulting in a weaker spark, it doesn't have the time to completly step up the voltage before the ignition is triggered especialy at higher rpms.
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
msd ignition
On the MSD 6a that i have, under 3000 rpm, it gives a mult spark to burn the fuel better, which helped my low end torque and power. Above 3000 rpm, it doesn't have enough "time" to give a mult spark, so it amplifies the voltage for the coil. Stock coils can have trouble providing enough power at high rpm because they have to recharge so quickly, so the MSD helps. It makes the engine run smoother at higher rpm.
Primary rig is:
95' F-150 EB 300/6 5 spd with 4" Superlift, MSD, Ram Air, Gibson Exhaust, 32" BFG Muds
THERE ARE SOME PICS IN MY GALLERY!! :-)
Then theres:
88' F-250 Superduty 351 + c6
95' Mercury Cougar 4.6L V-8
80' E-350 300/6 and a
3 spd column shifter. Top speed, 65mph, Go Baby Go!
The newest addition to the Ford family is a 99' Mustang GT 4.6L
Primary rig is:
95' F-150 EB 300/6 5 spd with 4" Superlift, MSD, Ram Air, Gibson Exhaust, 32" BFG Muds
THERE ARE SOME PICS IN MY GALLERY!! :-)
Then theres:
88' F-250 Superduty 351 + c6
95' Mercury Cougar 4.6L V-8
80' E-350 300/6 and a
3 spd column shifter. Top speed, 65mph, Go Baby Go!
The newest addition to the Ford family is a 99' Mustang GT 4.6L
Senior User
Joined: Mar 2002
Posts: 265
Likes: 0
From: Fayetteville, NC
msd ignition
MSD ignition...Well the MSD stands for multiple spark discharge and some say MASSive spark discharge which is exactly what it does just a 6al bod 0r a DIS system (required for distributorless ignition found on newer fords) will provide spark discharge for 120 degrees of crankshaft rotation. stock is like 30-40 degrees. all that basically means more HP. more spark=bigger bang in the cylinder=more Horsepowerwell worth it!
94 eb dual exaust, custom cyl heads, shift kit,home made cold air intake with scoop. 66mm throttle body, MSD, and 130,000 miles!
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