Spark plugs

[Timer]

Regarding the plug gap with the MSD ignition, following is the question I sent to the MSD techs and their reply:
Question:
I have a 468 Chevy in my v-drive boat and your MSD 6M-2 ignition system. The plugs are NGK R UR4 V-POWER set at about .036" gap. Are the plugs and gap OK? If not, what would you suggest?
Answer:
We do not have a preference to spark plug brand, brand of choice. We do offer a starting point to get you started
COMPRESSION SPARK PLUG GAP
up to 10.5:1 0.050"-0.060"
10.5:1-13.0:1 0.040"-0.050"
above 13.0:1 0.035"-0.045"
Open gap in 0.005" increments until best performance is obtained. The only thing we do recommend is to stay away from "hype plugs".
Thanks
MSD Tech

[Nivels]

Superdave
Your right on the gap of 18 to 20. My question had to do with the heat range of the plug. Timer why did you switch to MSD?

[superdave013]

I run blown & turbo charged engines. So I run colder plugs. I use autolight #133. To cold for what your doing. I would run the #13's in your deal. I'm sure the others will be ok, just never used them. Oh, I don't really buy into the platinum or fancy tip deals. I change them too often.
Vertex mags are great. The ones with the external coils are even better.
I ran a Mallory supermag 3. When I switched to MSD my boat starts better. I have better control of the timming. (Mallory mags suck for that) I have a soft touch rev control that works great. Oh, no point to deal with.
In your cruiser you will like an MSD set up.

[Timer]

Nivels, I changed the magneto for the MSD because I was told the magneto has magnets that are expensive to have aligned (?) and it doesn't have the energy/burning efficiency of the MSD at different RPMs. I had no experience with either type of system.
[This message has been edited by Timer (edited June 20, 2001).]

[ULTRA28]

sorry, wrong post
[This message has been edited by ULTRA28 (edited July 06, 2001).]