After digging into it a little bit it seemed like the nitrous was leaking a bit from the t fitting which is right before the nitrous goes into the air box. I replaced the nylon line with brass line and it doesn't seem to leak any more.
Took a quick video and I've never bench tested nitrous like that but it looks good to me, what does everybody else think?
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My rice rocket best times
Pump Gas: 8.85 @ 152.3 in 2016
Race Gas: 8.982 @ 152.16 in 2014
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