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hi i am running two direct port systems on my 565 one system is mounted 1 inch higher then the other one and both systems are exactly the same the top system works great with a 30n 22f tuneup at 5 3/4 fp pulling 9.5 out it runs a 8.51 @ 161mph
now when i put that same tune up in the lower kit it runs a 8.69 @ 156mph and it acts like its laboring and i got the nitrous pressure at 1000 on the launch on both systems
looked at the plugs on each kit when trying this and they look good can anybody help with this

and ps each system has its own -6 line and bottle
holley reg s
 

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the top system will most of the time hit a little harder than the lower one. try lowering your bottle pressure down to 900-950#'s.
and see what happens. when bottle pressure is that high(1,000),it will fall on it's ass faster.
 
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