Direct Port
I did this setup on my celica, it works and look amazing, but the truth is, it takes alot more work and planning to build a direct port setup correctly and you are more than likely never gonna use that big of a shot that would require a direct port setup.
The main benefit of direct port is even N2O/Fuel distribution to each cylinder and a colder charge, because you wont be cooling the whole plenum and it has less time to pick up heat. The up/down side is direct port is a harder hitting system.
Total power is adjustable the same way it is for a single jet, you just use more of them with smaller holes.
Cost and complexity are the biggest factors for why people don't use it more often. Instead of one nozzle and a hand full of jets, you need six nozzles, adjustment jets for each, more tubing and a distribution bocks.
Installation will require you to remove the intake/lower plenum and drill and tap it six times and install all of it as well. When you sell the car, it all comes off again, unless the buyer wants it or you just disconnect it and plug it up and call it a day.
In the end direct port is technically better but single nozzle more practical for the average user.
In all of that, I am probably going direct when the time comes
Chris
Total power is adjustable the same way it is for a single jet, you just use more of them with smaller holes.
Cost and complexity are the biggest factors for why people don't use it more often. Instead of one nozzle and a hand full of jets, you need six nozzles, adjustment jets for each, more tubing and a distribution bocks.
Installation will require you to remove the intake/lower plenum and drill and tap it six times and install all of it as well. When you sell the car, it all comes off again, unless the buyer wants it or you just disconnect it and plug it up and call it a day.
In the end direct port is technically better but single nozzle more practical for the average user.
In all of that, I am probably going direct when the time comes
Chris
You could run a bigger shot on stock internals as well, see with a single fogger setup, the cylinders closest to the intake or gonna take the hardest hit as they will get the most nitrous, making them more prone to damage. So on a small shot a single fogger is fine because you arent putting in enough nitrous to really hurt things, but on a bigger shot, say 100+ a direct port setup is much safer, as you could distribute the nitrous evenly to each cylinder, while a single fogger 100 shot might give a 30hp shot to each of the front 2 cylinders and divide the remaining 40hp to the rest of the car. However a 100hp shot on a direct port would only be about 16hp per cylinder, hardly anything dangerous.
interesting...
has anyone tried out the universal NX direct port kit that they now offer?
http://www.nitrousexpress.com/Pages/80004EFI.htm
has anyone tried out the universal NX direct port kit that they now offer?
http://www.nitrousexpress.com/Pages/80004EFI.htm
not sure if the Maximizer works with a direct port setup but it can ramp up the shot so it doesn't hit all at once: NX Maximizer
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I am planning to install the NX direct port injection system along with my new Crawford cast plenum, once I receive it. This way I can reinstall the OEM plenum when I take the car in for service, therby removing the NOS system as well. I plan to make the electrical connections via terminal blocks, so there will be no remaining visible wiring for the system either. It should be pretty trick! I have used direct port injection in the past and found that the benefits far out weight the added cost/complexity.
Last edited by g35irish; Feb 3, 2005 at 11:49 AM.
I'm doing the same on the electrical side.
I spoke to NX a few days a go and they said someone in NY is using their NXL direct port kit on a 350Z and is loving it.
I just don't know how it would fit since the fuel rail is so covered up
I spoke to NX a few days a go and they said someone in NY is using their NXL direct port kit on a 350Z and is loving it.
I just don't know how it would fit since the fuel rail is so covered up
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