My NX kit NEVER worked good on my engine.
I did all i could to improve things but without success.
The engine wasn´t running clean in the upper rpm range and the 100hp jets never felt like +100hp.
There was NO difference in using a Controller or not.
I was at the track for one day and decided to sell the kit and get a WON Kit.
Best ET with NX was 0.4s than NA.
Maybe i could improve things with some more time and money But i found my way to WON and i didn´t want to work with the NX kit anymore.
I put the WON Kit on the engine. The injectors in the same location, did the static test, test run was perfect.
50 hp jets without controller felt way better than the NX kit with 100 hp jets!!
I put 100 hp jets in with soft controller settings a beat the NX kit.
Et´s where 0.3s better than NX. No problem!
Even without controller the power comes in very smooth! On a cold day i put a bigger N2O jet in and am fine! (have to get a bottle heater)
With 150 hp jets and no controller (or with the setting from the 100 shot) wheelspin in 4th gear is no problem
With the controller set correct you can´t feel when the Nitrous comes in.
Et´s are 1s better than NA and i´m 20km/h faster. (still no bottle heater!!! there is more to come!)
This is all on a stock engine with some NGK Sparkplugs. No ignition retard no other mods!
And this is only how both kits perform on my engine. The difference is big!
NX also has a Forum (in germany) and someone you can call if you have some questions (btw: Trev called ME!). Again, the difference is big!
NX was a waste of money and time!
Thomas