C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Plug gap

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Old May 16, 2016 | 05:31 PM
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Default Plug gap

What do most people gap their
Double platinum plugs at with forced induction? 5psi
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Old May 16, 2016 | 09:55 PM
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93?

Mine are gapped to 25 but I will have 18 or so lbs on 93+meth
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Old May 17, 2016 | 02:33 AM
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I have mine at .035" running 8 psi and an MSD 6A and it works fine to 6000 rpm.
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Old May 17, 2016 | 11:17 AM
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Hi Herb - The bigger the gap the better !!! Why do some engines have 2 plugs per cylinder ?
The real question is what gap can you fire up to what RPM ? And that depends on your set-up. A distributor style engine on an 8 cylinder engine has limitations that can be met by reducing the plug gap or adding a CDI module - and on and on and on ! lol
greg
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