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So ive heard alot of different things when it comes to how much i should change the gap on my sparkplugs based on the power adders we got. So my question is what should i change my gap too on my plugs. Here is what i am running

89 LX 5.0 stock upper/lower intake, 80mm SCT MAF, GT45 turbo w/5psi (was part of car when i bought it), 42lb injectors, shorty headers, xpipe, new fuel press reg, e303 cam and NGK UR45 plugs. Thanks in advance for the help
 

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i gap mine at .028"-.030" on 9psi supercharger, runs great, no miss, no spark blow out
 

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On 5 PSI you should be alright out to .035 or so. My truck is a different motor altogether(5.4 Mod 2.3KB blower 17PSI), but I'm running TR6's at .032. Different motors, but forced induction is forced induction. Anything less than .030 and you're robbing yourself of power.
 
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