Numbers don't add up
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TECH Junkie
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From: Winter Garden, Florida
Numbers don't add up Bought a used NX kit and didn't get the results I was expecting. Currently am a h/c - bolt on car and am making right at 400rwhp. Thought I'd be safe on the stock bottom end and only run a 100 shot. Well TOO safe is what it turned out to be. It ended up netting me 5mph/5 tenths at the track in similiar weather - here's what the car did:
11.82 @ 116 N/A
11.33 @ 121 100hp shot
The car has since picked up near 2 tenths and a best of 123 mph, but that was with a good DA.
Got the car on the dyno on Friday to check a/f, and sure enough, only gained about 50hp. A/F seems to be good at 12.8 across the board. Guess for now I'm just going to jet higher to a true 100hp
11.82 @ 116 N/A
11.33 @ 121 100hp shot
The car has since picked up near 2 tenths and a best of 123 mph, but that was with a good DA.
Got the car on the dyno on Friday to check a/f, and sure enough, only gained about 50hp. A/F seems to be good at 12.8 across the board. Guess for now I'm just going to jet higher to a true 100hp
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TECH Junkie
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From: Winter Garden, Florida
Originally Posted by onebadz
Remember the lower the ET the more HP it takes to drop a tenth or gain a MPH.
Good luck
Wes
Good luck
Wes
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TECH Junkie
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From: Winter Garden, Florida
Just to make sure I've checked the jets, and then the next day I checked them again. Bottle pressure is controlled by my NX bottle heater and stays between 900 - 1050psi as confirmed by pressure gauge.
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Thread Starter
TECH Junkie
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From: Winter Garden, Florida
Got the TR6s in and have them gapped at 38. Went to fill the bottle and at least now I have an idea of what's going on. After 6 full passes on a 100 shot the gas was only down 2lbs! Looks like I'm not getting the nitrous flow either from the bottle valve or the solenoid. I upped the jets to 125 to see what would happen and ran the same as the 100.
Might want to check the nitrous filter. Did you blow the lines down after the install before spraying the car? I would think you should have used over a pound per run. I use about 1.5# per run with a 125shot. if your really using the 100 jets I dont think bigger jets will help. you must have a restriction in the line. Could the hose be pinched somewhere?
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TECH Junkie
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From: Winter Garden, Florida
I didn't expect changing the jets would solve the problem, just another confirmation that the gas isn't flowing. I've got time to figure it out, the track is closed for a month.
Originally Posted by onebadz
Remember the lower the ET the more HP it takes to drop a tenth or gain a MPH.
Good luck
Wes
Good luck
Wes
Originally Posted by next
So is 11.2 for a/f optimal on a 100 shot and if I go higher should I keep it at that?
Give us the specs on your car as well. As that plays a huge role on what power the car makes. With alot of valve overlap the nitrous kits have to be pilled higher just to make 100 rwhp. THe nX kits should make 100 rwhp easy with the 100 hp jetting.
Mike
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TECH Junkie
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From: Winter Garden, Florida
The TR6s are currently gapped @ 38. Right out of the box they were 40. I've checked the pills and nozzle twice and they appear to be clear of any blockage. I'm convinced though that there's either blockage in the bottle valve or a bad nitrous solinoid due to the low volume that the bottle is putting out.
Here's the specs on the car.
Comp Cams XR 228/228 .571/.571 113lsa
Stage II heads, Ferrero 2.02/1.57, Comp 918's
LS6 Intake, VHP MAF ends, polished TB, TB bypass, 160 t-stat, Direct Flo lid, K&N filter
NX wet kit, MSD Window switch
Midwest 4400 torque converter(non lockup), B&M trans cooler
LS1Edit tuning by Norris Motorsports
Exhaust
Jet Hot Headers, Hooker ORY, SLP dual/dual, Flowmaster muffler, exhaust cut-out
Suspension
Front sway bar delete, BMR sub-frame connectors, HAL QA1 front shocks/springs, CE rear shocks, BMR lower control arms and relo brackets, Spohn torque arm with spherical rod end
Misc.
Pro stars, ET Streets 26x11.5
Chrome moly, weld in, custom 6 pt roll bar
Jaz racing seats, RCI 5 pt harness
Walbro 340 intank fuel pump, Aeromotive fuel pressure regulator
Probably more info than anyone would ever need, but cut n paste makes life easy!
Here's the specs on the car.
Comp Cams XR 228/228 .571/.571 113lsa
Stage II heads, Ferrero 2.02/1.57, Comp 918's
LS6 Intake, VHP MAF ends, polished TB, TB bypass, 160 t-stat, Direct Flo lid, K&N filter
NX wet kit, MSD Window switch
Midwest 4400 torque converter(non lockup), B&M trans cooler
LS1Edit tuning by Norris Motorsports
Exhaust
Jet Hot Headers, Hooker ORY, SLP dual/dual, Flowmaster muffler, exhaust cut-out
Suspension
Front sway bar delete, BMR sub-frame connectors, HAL QA1 front shocks/springs, CE rear shocks, BMR lower control arms and relo brackets, Spohn torque arm with spherical rod end
Misc.
Pro stars, ET Streets 26x11.5
Chrome moly, weld in, custom 6 pt roll bar
Jaz racing seats, RCI 5 pt harness
Walbro 340 intank fuel pump, Aeromotive fuel pressure regulator
Probably more info than anyone would ever need, but cut n paste makes life easy!