Only force the ground electrode arm to the desired location, further away or closer to the center electrode. ***When adjusting the gap on your spark plugs, never pry, apply or exert any force on the spark plug center electrode, or center electrode ceramic insulator. If boost is 20psi or more, close the gap to. The Slingshot tends to idle and perform well overall and have a life with these plugs installed. They work constant and reliably at any power level. We recommend ONLY running the OEM ACDelco plugs for these cars. Gap to 0.028.ĪTS-V (Cadillac ATS-V, CTS V-Sport, LF4, LF3): OEM ACDelco iridiums or even better Denso iridium ITV24. LTG (2.0 Camaro 1LS, 1LT, 2LT, RS / 2.0 ATS Base, Luxury, Premium, Performance): Sonic/Cruze 1.4 (Sonic 1LS, 1LT, 1LZ/LTZ, RS | Cruze 1LT, Eco, 2LT, LTZ, RS): Turbo on e85 BKR7e gapped (tighten gap as boost goes up) rule of thumb is as large as you can go without breaking up. Turbo on 91-93: BKR8EIX iridiums for the best for performance. 032Ībove 500whp you can run the Denso race plugs we offer. No NGK or other brands as they cause misfires and do not run correctly. LNF / LHU (2008-2010 Cobalt SS-TC / 2008-2010 HHR SS / Sky Redline / Solstice GXP):ĪCDelco OEM GM plugs ONLY. Turbo/Highly modified: Autolite 103 or TR6/TR6IX. FWIW.L67/元2 SC: Stock or lightly modified, TR55/TR55IX, TR6/TR6IX, Autolite 103/104 gapped at. Not an expert, just figured Denso knows more about their Iridium plugs than I do so decided not to mess with their factory gap. Feels like power has dropped off a bit in the low end more recently, but that could be a few other factors including the distributor cap and rotor which are also at 75,000 miles, so can't blame it on the plugs (this particular engine has close to 290,000 miles on it, head untouched).Īlso have a set of Denso Iridium TT plugs recently installed into another FZJ80, not re-gapped, no issues. Now on a second set of the same plug with 75,000 miles. In a pinch they could have been cleaned up, regapped (carefully) and put back in service. That Denso determined the gap to optimal for that particular Iridium plug and if my aging system could produce enough energy to fire standard plugs at the FSM gap, then it should be able to fire the Iridium plugs at a slightly wider gap.Įither way, I've ran one set of Denso Iridium Power plugs for about 100,000 miles and when I took them out they were in not so bad a shape, center electrode still present, side electrode worn with increased gap. To fire an Iridium plug compared to a standard plug.
It's my impression from reading Denso's literature that it takes less energy NGK also recommends adjusting the gap no more than +/- 0.008” from the factory preset gap. If the gap must be adjusted, use a tool that only moves the ground electrode and does not pry between or against the electrodes. NGK recommends a round wire-style or pin gauge gap tool to measure the gap. Care must be taken to avoid bending or breaking off the fine-wire electrodes. While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment.
Do not change the gap on platinum, iridium or twin tip spark plugs, as the fine electrodes may get damaged.
Always use a special spark plug gapping tool to change the gap. With nickel plugs, especially with motorcycles, the gap may need adjustment. From Denso's website FWIW (I'm not a spark plug expert):ĭENSO spark plugs are manufactured with a pre-set gap.
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