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Before installing front mount it would max out .8 now with it goes to about 1 bar? Is this
Normal? other mods added is walbro
fuel pump and new colder spark plugs but I doubt that make diff
 
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Not sure what you know about these sort of cars, but this is the standard info for silvias

yep .9 - 1.0 is about normal for a SR once you have done a turbo back exhaust, FMIC, airfilter.
yes colder plugs will make a difference, also to the engines ability to resist det, colder plugs should be 7 for the boost you are running, make sure you gap them to .8mm even if they are iridium's
If you haven't got one get a EBC
 
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