I just bought one of those MSD 6A ignition systems. I'm just curious about any performance/driveability gains I can expect...

Mods are in my sig.

 

If your existing ignitionis working properly you will not see any performance gains. Many claim it smoothed up the idle a bit or made the car easier to start, but I promise you will be no faster if your old ignition was upto snuff-been proven at tracks across the country time and again.

 

None, also may be the start of electical problems after you install it.

 

not really sure why you say that....

i've used a 6, 6a and now a dig 6+ box - the 6a lasted me 7 years before i finally just upgraded... still worked fine

 

Anything mass produced is bound to have bad apples here or there, just as how/where it's installed will also lead to possbile problems.

Our group has 12 6AL's with the newest being 4yrs old and none have ever given a hint of problems to date.

 

Well, I got it installed... The driveability is better, but there's a little hesitation as soon as you give it gas. Probably needs to be re-timed.

While the rotor was off, I noticed the one spring for the mechanical advance weights was off. Its probably been like that since I bought the distributor, as that was the first time I had the rotor off.

 

I did back to back dyno tests and maybe a 2RWHP gain. Bottom line is you won't notice it.

 

It might smooth out your idle a little bit, that is about it though.

 

not worth the coin...better off bolting a bottle up...stock ignitions make more than enough spark for a street engine