Problem with SPF 1207

[gsharapa]

I know a lot of people are mounting the MSD 6AL box upside down under the dash. MSD recommends you not mount it upside down! If you are in an area of high humidity, rain or big swings in temp, the box can build up condensation which can not run out if it is upside down. Bottom line is a MSD box that will fail down the road! Your choice as many of the Superformance dealers are mounting them this way.

The 750 carb sounds ok based on your dyno results, but I would think the jetting is a bit weak for a 392 stroker. I was running a 750 double pumper with 74 in the primary and 76 in the secondaries, on a 351 crate 385 HP. I never liked vac secondaries and always wanted the over all performance and feel of a manual double pumper carb. Maybe some of the guys with this engine can post their success with what carb and setup of jetting and power valves.

I'm running a 514 with a 1050 double pumper with 86 primaries and 87 secondaries!

The MSD wiring is great. You can leave your SPF wiring as is and just use the following:

SFP Wire: MSD Wire:

Brown (Always Negative) attach to the Heavy Black wire on MSD Box

Black/Blue hook to the thin Red wire going into the MSD box,

Black/Green hook to the Tach plug on the MSD Box

The rest is hooked up as per MSD instructions;

. White wire not used,
. Heavy Red to + side of battery or + side (Hot) of solinoide,
. Orange to + side of coil,
. Thin Black to - side of coil,
. Green (-) & Violet (+) to the MSD Distributor

FIRE THAT BABY UP!!!!!!!!!!!!!!