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i used to run bcpr7es @ .028 in everything, then i switched to #4644 BKR7E @ .028 because they're V-attackPower
never had a problem with those at 22psi 440hp/380tq running wasted spark buick gnx coil on my rb25
however for my 6-800hp e85 2j build i may go 8 or 9 heat range
Dave
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