Sniper Readiness for First Start on 315W/427

[CP82AERO]

This forum is really helping me, as I am nearing first start on a 351W/427 with an all Holley Sniper system, meaning:
Holley In-tank "returnless" pump
Hyperspark distributer, Ignition Box and coil
550-511 Sniper Throttle body unit

Also, per Holley I have sniper-dedicated pos/neg runs to the battery posts--separate from main cabling

And, per common sense and wisdom gained from reading about EMI issues I have:
-mounted the coil and CD box away from the ECU and distributor
-all associated wiring is either routed away from spark plug wires, distributor, alternator wiring, and am paying attention to ensuring 90 deg crossing of other wires.

So am I good? Aside from the EFI problems that make it to the forum many of you out there, many of you have no or few problems and so do I need to go the extra mile to shield the distributor, upgrade the MSD-5540 "Street Fire" plug wires (500 ohms per foot of resistance, helically wound conductor that suppresses EMI)?

Finally--and perhaps important--I didn't realize that Holley recommends not tying in the hyper spark distributor for first start, adding it in later. Why? Do I really need to source an old-school distributor (with a steel gear) initially?

Thanks, Brian

[ggunter]

Sounds like you have covered the bases, fire that baby up!!!

[ggunter]

You may or may not have issues with the sniper. I removed mine and went back to a carb.

[Papa]

There's another thread on gear material issues with the Hyperspark distributors. Are you certain your gear is the right one? Other than that, run through the initial setup wizard for the Sniper and it should start if all the connections are correct. From there, check the timing per the Hyperspark directions. You'll do that with a static timing test that you'll configure through the Sniper's handheld unit. Once up to temperature, you'll set the idle and IAC and that should get you to a good starting point. Remember, the Sniper's self-learning will only build a learning table for the fuel map. At some point, you'll need to merge the learning table to the actual table. Be sure to read the entire Sniper manual, not just the quick-start guide.

[CP82AERO]

Great advice!...and my Hyperspark dizzy came with a cast iron gear which I had a machine shop change out for a steel one I found on Summit--I have a Comp Cams hydraulic roller.

Thanks again.