Spark plug and gap
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 1,007
Likes: 196
From: Sullivan Illinois
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Spark plug and gap
I have a '99 frc 32,000 miles. It has a small Lunati cam 221 .558 116 lsa, Bassani long tube headers w/ crossover pipe & high-flow cats. Currently running NGK TR-55 & magnecor wires. Is this the right plug to be using and what should the gap be? Thanks for any help you can give me.
Le Mans Master
Joined: Sep 2007
Posts: 7,604
Likes: 8
From: Belleville Il
Plugs are a matter of personal preference,,not personally familiar with them,but a lot of members seem to like them. I used delco Iridiums gapped at .040 which is a good all around gap.You can't go wrong with it.Some Tuners recommend .035 on performance tunes,some years had .060,but.040 will run fine and last a while as even with wear it still won't be too wide.Mine is a 2000 and that what was in the book for it.
