I am wondering if some one can explain the effects of spark blowout. I have my on3 kit on and have not the opportunity to enjoy it yet. My combo is gt40x heads, 1.7rr's, b cam. edelbrock performer rpm intake, 42's, dbx meter, anderson inline boosta pump, msd btm. The car seems to idle and cruise fine but at around 2500 it breaks up badly. I forgot to mention a forced induction intank 255 fuel pump.