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MSD Pro Billet LT1 Distributor - The Final Opti

MSD's Pro Billet LT1 Distributor May Be The Last Optispark You'll Ever Need

Jay Heath Aug 9, 2007
Vemp_0709_01_z MSD_LT1_distributor Optispark_replacement 2/11

To ensure that our Pro Billet LT1 distributor performed up to spec, we included MSD custom-fit plug wires and a fresh set of NGK TR-55 plugs as part of our installation.

OptiSpark. The name alone is enough to give '92-'96 Vette owners the jimjams and send even the most jaded auto techs scurrying for their shop manuals. Indeed, with the possible exception of the ill-starred "Crossfire" injection system of the early '80s, no single piece of engine hardware has heaped more ignominy on the Corvette's exalted powertrain history than this legendarily perfidious crank-triggered ignition unit.

That the OptiSpark turned out to be such a stinker is all the more disappointing in light of the technologically vanward thinking behind its basic design. By keying spark events to the crankshaft, the front-mounted Opti was able to provide a level of timing accuracy far superior to that of any conventional, top-mounted ignition unit. But when it failed-and boy, did it fail-the car's drivability tanked, leaving owners facing a host of drivability issues and a roughly $1,000 repair bill.

Fortunately, MSD now offers the Pro Billet LT1 distributor, a comprehensively upgraded OptiSpark unit designed to fit all LT1- and LT4-powered Corvettes. We covered the Pro Billet's particulars in a previous article titled "The OptiSpark Option," which appeared in our November, 2006 issue. This month, we offer an overview of an installation recently performed on this author's Polo Green '96 Coupe.

Vemp_0709_02_z MSD_LT1_distributor Optispark_replacement 3/11

Here's our stock OptiSpark unit prior to removal. Given the amount of crud that builds up on these things, is it any wonder they're prone to failure?

Because of the rather involved nature of the job, we strongly recommend having it performed by an experienced, Corvette-savvy mechanic. Fortunately for us, the folks at Brandon, Florida-based tuner Rev Xtreme had performed a number of Opti swaps over the years and were more than happy to help out. The highlights of the installation, performed by Rev X tech Kyle Briese, are included herewith.

While we didn't see a horsepower improvement with the MSD Opti, the modified car did seem to pull with more verve in the higher rpm ranges. Furthermore, we expect the MSD unit's timing-adjustment feature to prove a real benefit as our modification regimen intensifies.

In the meantime, the Pro Billet LT1 distributor's reasonable price tag ($515-about $200 more than a factory replacement), top-quality features, and ironclad reliability make it a welcome addition to our budget-oriented '96. It may be late in the game, but thanks to MSD, installing your final Opti is now a reality.


Rev Xtreme
Tampa, FL
(813) 628-0080



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