Which MSD ignition?

[Scrapla]

Im going to be running a 347 engine with about 100-125hp of NOS and I was wondering what MSD ignition would be best I see the 6a series with RPM limiting and also noticed the 6a BTM made for cars running boost which allows you to retard the timing, what do you guys/gals think?

[bigred90gt]

I bought 6AL and it started acting stupid after about a year. Sometimes the car will crank, sometimes it wont. I am going to look into another ignition when I rebuild my 90.

[stang_racer20]

I'd go with the 6BTM. Check it out first thought, cause I'm not sure what the difference would be for boost and N2O as far as ignition goes.

[Fat0eknee]

ive seen no problems with my 6al and i have the add on to adjust the timing from the inside i havent looked up the prices to see which route would be cheaper but mine works just fine

[blackEagle]

Originally posted by Scrapla
Im going to be running a 347 engine with about 100-125hp of NOS and I was wondering what MSD ignition would be best I see the 6a series with RPM limiting and also noticed the 6a BTM made for cars running boost which allows you to retard the timing, what do you guys/gals think?

If you plan to spray it, use the Digital 6 box. It has the rev limiter plus a timing retard for nitrous. Don't forget the window switch.

[Scrapla]

Which is the digital 6, on the MSD website theres alotta 6a versions

[MidNiteBlu 5.0]

http://msdignition.com/images/6520.gif

that is the digital 6. its listed under products and then under drag racing on thier site.

Thier site doesnt direct link so you have to do that

[Scrapla]

I got it thanks, Digital-6 plus ignition control PN 6520