Direct port Nitrous or Single nozzle (NOS)
Mar 17, 2019, 09:03 PM
#1
Newbie
Thread Starter
Direct port Nitrous or Single nozzle (NOS)
Hi everyone,
I am in the midst of building my new setup and contemplating between direct port or single nozzle for the setup. I will be running E85 with PTE 7685 on a stroked 94mm crank with I beam rods and a JE piston. Some say direct port is not suitable for turbo application compared to the single nozzle where it is placed before the throttle body.
Secondly, if i were to opt for direct port injection, should the trigger be synchronized with the injector? I will be triggering the NOS on WOT and the setup is meant for a drag application.
Hope you guys could shed some lights and advise for those who have experiences in such application.
I am in the midst of building my new setup and contemplating between direct port or single nozzle for the setup. I will be running E85 with PTE 7685 on a stroked 94mm crank with I beam rods and a JE piston. Some say direct port is not suitable for turbo application compared to the single nozzle where it is placed before the throttle body.
Secondly, if i were to opt for direct port injection, should the trigger be synchronized with the injector? I will be triggering the NOS on WOT and the setup is meant for a drag application.
Hope you guys could shed some lights and advise for those who have experiences in such application.
Mar 17, 2019, 09:12 PM
#2
EvoM Guru
iTrader: (1)
That turbo is nearest going to make less boost than what is about max for E85's octane. You should really be looking into running meth, or a smaller turbo.
Mar 17, 2019, 09:20 PM
#3
I would never use single nozzle NOS because how can you control how much gets into each cylinder? Then again, with all available antilag options, I would look into mild antilag before NOS.
If you are concerned about timing it with injector pulses, does that mean it shuts off with each pulse? I just can't see the solenoid keeping up long term. Besides, what is the lag between injector signal to open the NOS nozzles? I can't see timing of NOS getting into cylinders being the same as your fuel. (In short, I can't see synchronizing with injectors working). Good luck.
If you are concerned about timing it with injector pulses, does that mean it shuts off with each pulse? I just can't see the solenoid keeping up long term. Besides, what is the lag between injector signal to open the NOS nozzles? I can't see timing of NOS getting into cylinders being the same as your fuel. (In short, I can't see synchronizing with injectors working). Good luck.
Mar 17, 2019, 09:49 PM
#4
Newbie
Thread Starter
I would never use single nozzle NOS because how can you control how much gets into each cylinder? Then again, with all available antilag options, I would look into mild antilag before NOS.
If you are concerned about timing it with injector pulses, does that mean it shuts off with each pulse? I just can't see the solenoid keeping up long term. Besides, what is the lag between injector signal to open the NOS nozzles? I can't see timing of NOS getting into cylinders being the same as your fuel. (In short, I can't see synchronizing with injectors working). Good luck.
If you are concerned about timing it with injector pulses, does that mean it shuts off with each pulse? I just can't see the solenoid keeping up long term. Besides, what is the lag between injector signal to open the NOS nozzles? I can't see timing of NOS getting into cylinders being the same as your fuel. (In short, I can't see synchronizing with injectors working). Good luck.
Mar 17, 2019, 09:50 PM
#5
Evolving Member
Mar 18, 2019, 05:37 PM
#6
Newbie
Thread Starter
Mar 19, 2019, 01:22 AM
#7
Evolving Member
Hook the solenoids up directly to the DPOs and you can enable Nitrous in the functions menu of ESP. This is how I would drive them. I wouldn't mess with trying to get them to match the injectors.
Single port at the throttle body will be waaay easier to set up and has the advantage of being way easier/faster to re-jet. However as others have mentioned you will have variance in nitrous flow from cylinder to cylinder. If you have an EGT in each exhaust manifold runner you can use Haltech's cylinder correction feature(I believe it's under the fuel settings in ESP) to adjust fueling to somewhat negate that.
Single port at the throttle body will be waaay easier to set up and has the advantage of being way easier/faster to re-jet. However as others have mentioned you will have variance in nitrous flow from cylinder to cylinder. If you have an EGT in each exhaust manifold runner you can use Haltech's cylinder correction feature(I believe it's under the fuel settings in ESP) to adjust fueling to somewhat negate that.
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Mar 19, 2019, 06:12 PM
#8
Hook the solenoids up directly to the DPOs and you can enable Nitrous in the functions menu of ESP. This is how I would drive them. I wouldn't mess with trying to get them to match the injectors.
Single port at the throttle body will be waaay easier to set up and has the advantage of being way easier/faster to re-jet. However as others have mentioned you will have variance in nitrous flow from cylinder to cylinder. If you have an EGT in each exhaust manifold runner you can use Haltech's cylinder correction feature(I believe it's under the fuel settings in ESP) to adjust fueling to somewhat negate that.
Single port at the throttle body will be waaay easier to set up and has the advantage of being way easier/faster to re-jet. However as others have mentioned you will have variance in nitrous flow from cylinder to cylinder. If you have an EGT in each exhaust manifold runner you can use Haltech's cylinder correction feature(I believe it's under the fuel settings in ESP) to adjust fueling to somewhat negate that.
Mar 19, 2019, 06:57 PM
#9
Evolving Member
Mar 20, 2019, 04:59 AM
#12
a 30-50 Shot using a single wet fogger will get the turbo up quick. Use the haltech I/O to kick it on above ~95% throttle and maybe 3000rpm. I ran this setup in my Z for many years with zero issues, but started with a 35 shot and ended up at 125 shot because it was so addictive.
Get the AFR dialed in first without nitrous and then tune AFR with the fuel pills on nitrous to match. On 50 shot you probably want to have it reduce timing at least 1 degree.
Get the AFR dialed in first without nitrous and then tune AFR with the fuel pills on nitrous to match. On 50 shot you probably want to have it reduce timing at least 1 degree.
Mar 20, 2019, 06:02 PM
#13
Newbie
Thread Starter
a 30-50 Shot using a single wet fogger will get the turbo up quick. Use the haltech I/O to kick it on above ~95% throttle and maybe 3000rpm. I ran this setup in my Z for many years with zero issues, but started with a 35 shot and ended up at 125 shot because it was so addictive.
Get the AFR dialed in first without nitrous and then tune AFR with the fuel pills on nitrous to match. On 50 shot you probably want to have it reduce timing at least 1 degree.
Mar 20, 2019, 06:15 PM
#14
I ran a 2 speed powerglide in my 240Z behind a 3.1L 280Z motor running a pair of TDO5 16G turbo's so I needed the nitrous to get the car off the line. Man I miss the NOZ!
