What gap for 408 ???
04-02-2015, 03:51 AM
#1
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What gap for 408 ??? The ngk platinum (PZTR5A-15) spark plugs are pre gapped at 1.5mm.
Would this gap be ok for a 408ci Ls1 stroker (460rwhp) ??
Would this gap be ok for a 408ci Ls1 stroker (460rwhp) ??
04-08-2015, 04:15 PM
#3
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Gap is about compression ratio, not displacement.
That is, really, peak cylinder pressure (CR times any
boost / jug / whatever).
If your compression ratio is similar to stock then use
a similar gap.
That is, really, peak cylinder pressure (CR times any
boost / jug / whatever).
If your compression ratio is similar to stock then use
a similar gap.
