On the LS-1's I have seen several run 12.9's with only a whisper lid and exhaust with a good driver. The only 14 sec ones I have seen are crappy drivers or V-6's posings . They only get roughly 1 sec per 100 shot just like everything else in my experience.
and yes at 1400 psi it will flow more N2O then expected so if the jetting is correct for 100hp at 1000 then it will be more then 100hp at 1400.
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A good plan, violently executed now, is better than a perfect plan next week.
George S. Patton, General (1885-1945)
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