Dominator24

Has anyone experimented with the spring selection to develop MSD advance curves with a bravo magnum 454 gen4? It looks like curves B and C are similar and top out around the max rpm for my motor (around 4600). I had decent results with the factory set up but would like to dial it in better with winter additions of a new carb, headers and intake.
Thank you,
Jim

MILD THUNDER

I would run the largest "black" bushing in the kit. This will allow for more base timing, and will help it idle better. I'd set the total timing to 34*, which will give you around 16* base timing. I'd use spring setup "B", which will have full advance in by around 3200RPM.

Dominator24

Thanks Mild Thunder! Idling is key in our multipurpose application. Is there a set up that optimizes top end?

ezstriper

your best bet is to leave the MSD dist in the box and run something else, as they love to turn to rust in no time at all, they also give NO performance advantage over even a simple HEI

sutphen 30

exactly,,merc dist w/ v6 or hp-v8 module.or for less work,stock 350/454 distributor from the 88-95 era,2 wire hook up,just need the right internal module as I've seen a few come thru w/ no limp/back up advance curve programmed into them.

SB

Friends do not let friends run distributors with moving weights in their boat.

And this being said from someone without a smartphone. LOL.

fbc25el

I put some holes in the bottom of my cap to try to vent it better to see if that would help with the rust. Did not help much. I put a crank trigger on it and pulled everything out of the distributor but the rotor button. Now that helped.

MILD THUNDER

I've been running msd distributors for quite some time now. I learned years ago about their "rust" issues.

In 2010, I sent both rust buckets back to MSD to be rebuilt. They came back like brand new. I coated the internals of them with CRC SP-400. The reluctor, magnetic pickup, shaft, etc, all still looks like the day I coated them 5 years ago.

The CRC stuff has impressed me. It does exactly what is supposed to do.

http://www.crcindustries.com/ei/prod....aspx?id=03282

MILD THUNDER

I do agree though, for a basic 454 merc, the stock ignition is hard to beat.

the stock cams are pretty mild, and don't really "need" more base timing than the setup using the 24* V8 module. The option to use a V6 module is always there too if you installed a hotter cam too.

Knot 4 Me

Remember to blue Loctite those rotor screws!