mrr23
08-30-2006, 09:16 PM
here's some testing i did with the wife's car. i was wondering why some companies rate at motor and some rate at rear wheels, given the same jetting. i had .063" nitrous and .033" fuel pills in for what Ny-trex says is 150 motor rated. NX says that's rear wheel rating. so, to try and figure this out, ricky from NX suggested that some of it might be in the nozzle that i was using. so, i bought the NX Shark nozzle to compare it to the Ny-trex nozzle i already had on the car. also, i talked with Ny-trex about this as well. what they suggested is that the small solenoid that comes with their basic kit might be a restriction at the level i'm using. the Ny-trex small solenoid has a .081" orifice. the jet is a .063" the theory is once you reach about 70% jet size to orifice size, you are maxing out what the solenoid can do. i was at 77%. so, Ny-trex suggested that i move up to their larger solenoid with a .125" orifice. this would bring the ratio to about 52%.
here's the results: http://www.stealthram.com/nxnytrex.htm
test #1 - given exact same jetting and switching from the Ny-trex to the NX Shark nozzle, i gained 8.7 rwhp and 0.19 rwtq. these are peak numbers. the NX Shark made the a/f ratio .5 leaner.
test #2 - i put the Ny-trex nozzle back in and then jetted the fuel side down from .033" to .031". so, with the same A/F ratio, the NX nozzle made 4.49 rwhp more. The ny-trex nozzle made 5.43 rwtq more.
test #3 - this is where it gets interesting. now, i swapped out the small solenoid to the larger solenoid. changing nothing else, i gained 18.5 rwhp and 20.05 rwtq. another interesting find is the a/f ratio went lean again. thought here is more liquid nitrous is getting through the solenoid and to the nozzle.
test #4 - i raised the fuel jet back to .033" from .031". this made the a/f ratio the same to compare the small solenoid to the larger solenoid. still gained 17.75 rwhp and 8.75 rwtq.
test #5 - i put the NX Shark nozzle back in with the same jetting to see if test #1 would repeat itself. 6.81 rwhp and 22.9 rwtq more with again a leaner mixture.
here's the results: http://www.stealthram.com/nxnytrex.htm
test #1 - given exact same jetting and switching from the Ny-trex to the NX Shark nozzle, i gained 8.7 rwhp and 0.19 rwtq. these are peak numbers. the NX Shark made the a/f ratio .5 leaner.
test #2 - i put the Ny-trex nozzle back in and then jetted the fuel side down from .033" to .031". so, with the same A/F ratio, the NX nozzle made 4.49 rwhp more. The ny-trex nozzle made 5.43 rwtq more.
test #3 - this is where it gets interesting. now, i swapped out the small solenoid to the larger solenoid. changing nothing else, i gained 18.5 rwhp and 20.05 rwtq. another interesting find is the a/f ratio went lean again. thought here is more liquid nitrous is getting through the solenoid and to the nozzle.
test #4 - i raised the fuel jet back to .033" from .031". this made the a/f ratio the same to compare the small solenoid to the larger solenoid. still gained 17.75 rwhp and 8.75 rwtq.
test #5 - i put the NX Shark nozzle back in with the same jetting to see if test #1 would repeat itself. 6.81 rwhp and 22.9 rwtq more with again a leaner mixture.