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Hey guys hope somone can help me with my flat spot problem...

Have a red top rb20 and just put r33 turbo, elec boost control running 11 psi

It was fluttering and missing up top from 5 - 7k rpm after i ran more boost so i changed the plugs. Told the gaps are too big for the boost.

put some NGK R iridium number 7 plugs in and car is heaps smoother and responsive but flat spots in power from 4500 to 6000 rpms.

After 6000 it pulls real nice and smooth to 7000 rpm

Never had any probs on stock setup

any help would be great

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https://www.sau.com.au/forums/topic/119794-big-flat-spot-on-rb20/
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