MSD Ignitions, Which one?
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Freshman User
Joined: Apr 2000
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MSD Ignitions, Which one?
I notice many of you run MSD ignitions. What is the difference between a 5 and 6a and is the 6a really worth fifty bucks more. I have serveral vehicles I'd like to put these on but some are modified and some are stock. The modified ones are just moderately modified; one has a Edlebrock Perf. plus cam and the other has a cam and intake.
Posting Guru
Joined: Jun 1999
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From: Durham
MSD Ignitions, Which one?
The MSD 5 is a multi-spark inductive discharge ignition mainly designed to be used with stock engines.
The 6A is the bae capacitive discharge system. A transformer steps up the input voltage (in nano seconds) and stores the charge in a large cpacitor. When the ignition is triggered, the capacitor releases all of the engergy instantly.
The 6AL includes a rev limiter.
I run the 6A with an adjustable timing control on my 351W.
'82 F150 2WD w/351W (orig 300 I6)
Slik
Senior User
Joined: Aug 1999
Posts: 343
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MSD Ignitions, Which one?
I recommend the MSD 6A. If you don't need the rev limit, the multi-spark capacitive discharge really helps idle and fuel consumption.
I have a MSD 6BTM (an AL with Boost retard control) on my turbo race car and it performs flawlessly at rpms up to 8000.
Later.
Randy
I have a MSD 6BTM (an AL with Boost retard control) on my turbo race car and it performs flawlessly at rpms up to 8000.
Later.
Randy
