Wet Vs. Dry (Direct Port)
07-09-2002, 06:46 AM
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Wet Vs. Dry (Direct Port)
ok,so here it is,at the end of the month i should be getting a considerable amount of Pocket Change,
i ditched the Turbo after finding out they want two grand to make a manifold,so im going to drop a NO2 kit in my bucket,now,,the big question is do i want Direct port or a dry set up,,now granted they dont make enough internal parts for my car so im kinda sceptical about the wet setup,,what do you guys think regardless im going to be usiing either the JG Kit or NOS
LOL,,,ok now im in the right forum!!!!!!!
i ditched the Turbo after finding out they want two grand to make a manifold,so im going to drop a NO2 kit in my bucket,now,,the big question is do i want Direct port or a dry set up,,now granted they dont make enough internal parts for my car so im kinda sceptical about the wet setup,,what do you guys think regardless im going to be usiing either the JG Kit or NOS
LOL,,,ok now im in the right forum!!!!!!!
07-09-2002, 07:02 AM
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Dry kit are good for up to about 55 horsepower increase. Wet kits border on reliability at 75 horsepower... Direct port kits on stock Tiburons have been seen in the 150hp eek! levels in Puerto Rico.
A dry system sprays nitrous ONLY, and relies on increased fuel pressure (or fancy electronics) to get your stock fuel injectors to supply the needed fuel. The limit here is what your stock fuel system can do...
A wet system sprays nitrous and fuel out of the same nozzle, which takes care of the (obvious) fuel problem. However, your manifold is meant to flow AIR, not liquid. Thus, a wet system main failure point is bad (uneven) distribution of the fuel which leads to certain cylinders running lean and melting expensive pieces sad.gif There's no workaround to this, the limit is about 75 horsepower due to flow restrictions in the manifold.
A direct port system is a wet system but at much more complex levels. A wet nozzle is installed on each intake runner right before the cylinder head. This allows for very precise metering of fuel and nitrous to each cylinder. The drawback is that the smallest nozzles you can get are about 25HP each, which gives you four 25hp nozzles = 100HP shot as the minimum requirement.
Your call on how crazy you wanna get...
A dry system sprays nitrous ONLY, and relies on increased fuel pressure (or fancy electronics) to get your stock fuel injectors to supply the needed fuel. The limit here is what your stock fuel system can do...
A wet system sprays nitrous and fuel out of the same nozzle, which takes care of the (obvious) fuel problem. However, your manifold is meant to flow AIR, not liquid. Thus, a wet system main failure point is bad (uneven) distribution of the fuel which leads to certain cylinders running lean and melting expensive pieces sad.gif There's no workaround to this, the limit is about 75 horsepower due to flow restrictions in the manifold.
A direct port system is a wet system but at much more complex levels. A wet nozzle is installed on each intake runner right before the cylinder head. This allows for very precise metering of fuel and nitrous to each cylinder. The drawback is that the smallest nozzles you can get are about 25HP each, which gives you four 25hp nozzles = 100HP shot as the minimum requirement.
Your call on how crazy you wanna get...
07-09-2002, 07:11 AM
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QUOTE
Red:
The drawback is that the smallest nozzles you can get are about 25HP each, which gives you four 25hp nozzles = 100HP shot as the minimum requirement.
i knew itThe drawback is that the smallest nozzles you can get are about 25HP each, which gives you four 25hp nozzles = 100HP shot as the minimum requirement.
i argued with someone about this a while back ago
they said something about a 60 shot direct port
oh well
thanx red
07-10-2002, 04:30 AM
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Ok I am going to set Jaws and Red right for once and for all about the NX direct port Nitrous systems. The lowest setting for the direct port IS 50 HP to the wheels. The way it works is that it uses a 18 Nitrous jet and a 16 Fuel Jet. Now to get 12.5HP per cyl you change down the fuel pressure to the fuel jets with the supplied fuel regulator down to 7psi. Instead of the standard 40-50psi. This is why NX says you must have upgraded internals for the Direct Port systems. This will overall give the engine the same amount of fuel as it would on a 50HP fogger system. And the same amount of nitrous as a 50HP fogger system. Anyone else wants to argue with me CALL NITROUS EXPRESS and they will say the same thing. Do Not Argue with me about the NX kits. Remember I am a dealer for them and I Know My kits. Also every NX kit is rated at WHP not crank Hp or anything else. You will get 99.8% of the HP rating they say they do. This is why the jet is an 18 and not slightley smaller. This is to compensate for the drive train losses through the tranny and wheels. so you might say 18 X 4 is actually 72HP well, think of what you would be lossing through the tranny and tires. Remember this next time you want to know how much HP extra you will be running on a certain Jetting with other kits as well. You may only net 30-35HP from a 50 shot Zex system and 40HP from a 60 shot NOS system. You will net 50HP from a 50 HP NX system. TNT nitrous systems use flywheel HP. NOS and ZEX use Crank HP.
07-10-2002, 04:48 AM
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SCCA, you have corrected nothing.
You stated by yourself that you use an 18 jet to attain a *50HP* shot. Guess what? 18 x 4 doesn't equal 50? Wanna know why? Because it's rated AT THE CRANK.
Wanna know why it's ALWAYS measured at the crank?
Let's strap a single-fogger NX *50HP at the wheels* kit onto a 1.3L Honda Insight. It will probably gain another 50HP at the wheels just like you say -- maybe even more.
Now let's strap that exact same kit to a Chevy 1-ton dually with a gasoline 5.7L (350) engine. Guess what? You will NEVER get 50 wheel horsepower out of that thing. Guess why? Gee, could it be because the transmission rotating assembly just gained about 700% more mass than in the Honda Insight?
Nitrous is rated at the crank, period, end of discussion. Anyone who claims otherwise (individuals OR marketing divisions) doesn't know their butt from a hole in a rusty muffler.
You even said admitted to it yourself.
You stated by yourself that you use an 18 jet to attain a *50HP* shot. Guess what? 18 x 4 doesn't equal 50? Wanna know why? Because it's rated AT THE CRANK.
Wanna know why it's ALWAYS measured at the crank?
Let's strap a single-fogger NX *50HP at the wheels* kit onto a 1.3L Honda Insight. It will probably gain another 50HP at the wheels just like you say -- maybe even more.
Now let's strap that exact same kit to a Chevy 1-ton dually with a gasoline 5.7L (350) engine. Guess what? You will NEVER get 50 wheel horsepower out of that thing. Guess why? Gee, could it be because the transmission rotating assembly just gained about 700% more mass than in the Honda Insight?
Nitrous is rated at the crank, period, end of discussion. Anyone who claims otherwise (individuals OR marketing divisions) doesn't know their butt from a hole in a rusty muffler.
You even said admitted to it yourself.
07-10-2002, 06:41 AM
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Then explain why a Chevy V8 LS1 camaro dyno'd an extra 149HP to the WHEELS with a 150 HP fogger system?
18 X 4 = 74HP at the crank plus what ever the extra fuel is giving it. Maybe an extra 10HP total. Now you say at the crank ot the jets are AT THE CRANK yes but the system is 50 at the wheels. You corrected nothing with me.
you run a 50HP direct port nitrous kit on a 4 cyl engine you will get 50 HP at the WHEELS. Becaus ethat kit is giving 72HP at CRANK.
When NOS does there jets the jets for a 50 shot are smaller jets than NX will use for their 50HP system. Meaning you AINT gonna see 50HP at the wheels you will see it at the crank. A 50 shot TNT kit will see 50 at the flywheel. The TNT jets are bigger than the NOS and smaller than the NX jets. Get it???????
18 X 4 = 74HP at the crank plus what ever the extra fuel is giving it. Maybe an extra 10HP total. Now you say at the crank ot the jets are AT THE CRANK yes but the system is 50 at the wheels. You corrected nothing with me.
you run a 50HP direct port nitrous kit on a 4 cyl engine you will get 50 HP at the WHEELS. Becaus ethat kit is giving 72HP at CRANK.
When NOS does there jets the jets for a 50 shot are smaller jets than NX will use for their 50HP system. Meaning you AINT gonna see 50HP at the wheels you will see it at the crank. A 50 shot TNT kit will see 50 at the flywheel. The TNT jets are bigger than the NOS and smaller than the NX jets. Get it???????
07-10-2002, 06:54 AM
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Good lord, you're really serious? rolleyes.gif
You mean to tell me that every last car on this planet has the exact same rotational mass percentage loss? My old 1.0L Geo Metro suffered EXACTLY THE SAME rotational percentage loss that an Z06 vette does?!?!?!
If you pull your head out, you realize that it's 100% impossible. The ONLY WAY that NX can *rate* a system for wheel horsepower is if every car in the universe lost the exact same amount of power (percentage) to rotational loss.
Guess what? It doesn't work that way and YOU KNOW IT. Why are you arguing such an incredibly stupid point??? This is 100% blatently obvoius to anyone who knows ANYTHING about a car!!
You mean to tell me that every last car on this planet has the exact same rotational mass percentage loss? My old 1.0L Geo Metro suffered EXACTLY THE SAME rotational percentage loss that an Z06 vette does?!?!?!
If you pull your head out, you realize that it's 100% impossible. The ONLY WAY that NX can *rate* a system for wheel horsepower is if every car in the universe lost the exact same amount of power (percentage) to rotational loss.
Guess what? It doesn't work that way and YOU KNOW IT. Why are you arguing such an incredibly stupid point??? This is 100% blatently obvoius to anyone who knows ANYTHING about a car!!
