I was looking into Brisk ZC Multispark plugs. The design is interesting. it doesn't have a ground strap like regular plugs, nor is it one with multiple ground straps to get in the way of the flame front.
I'm thinking of putting them into my 1990 Pontiac Lemans (1.6L engine). Will I see better gas mileage or performace?
No. If they were that great, they would come standard in your car. Vehicle manufacturers are under tremendous pressure to improve fuel economy, so every relatively cheap modification or part they can use will definitely be used. If they didn't use something, it's either because they're too expensive or they don't really perform as well as stated.
When your engine was in its design and testing phase, OEM manufacturers of the various components will have tested and tested again all of the component parts to an exacting standard. You will not gain any advantage by detracting off of this standard. The Brisk plugs may offer some enhancements in a race tuned engine, but the suggestion that a plug without a protruding ground electrode will accelerate the flame front to any appreciable amount would not really stand upto critical examination.
