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Old 04-22-2003, 12:24 PM   #1
redchris_2020
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Member#: 18757
Join Date: May 2002
Location: Oregon
Vehicle:
2000 2.5RS Coupe
Blue

Default nitrous Bottle pressure

What bottle pressure do you guys have, my pressure seems to be way to low, it is at 620, the guy at the shop I went to said that it should be around 1100 on a new bottle, which mine is. I know that a bottle heater will probably fix this, but I was just curious because my nitrous system is sucking right now. I bumped up the fuel pressure, so now the nitrous seems to be working alot better but still it is not a huge difference. What fuel pressures do you guys recomend My fpr is set at 42 psi, is that to high for stock injectors or is that okay, I do not know what the fuel pressure should be. Thanks
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Old 04-22-2003, 03:37 PM   #2
Supapooh
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What kind of nitrous system?
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Old 04-22-2003, 04:10 PM   #3
kturner
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Bottle pressure is more temperature dependent than % full. I would have said decent pressure was around 900 psi. Bottle heaters may well kick that up. My ZEX dry kit bumps the fuel pressure to about 60 psi (<55 shot mode) which is as high a pressure as I am comfortable with. I have no real basis for that comfort conclusion though. Also, if you have a wet kit your fuel pressure will be quite a different situation. Do you have any gauges such as A/F or EGT? I would recommend that you get something to warn of lean running. Otherwise, start known rich, listen carefully for detonation and check your plug condition frequently until things dial in.
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Old 04-22-2003, 05:48 PM   #4
redchris_2020
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I am running a zex 55 shot, I just gteched my car at lunch and I ran a 14.2 at 95.3, so it seems to be working fine now, because of the warmer temperature today my bottle pressure is at 720, I will probably invest in a bottle heater, do you guys think that it would be okay to run a 75 dry shot or would that be stupid, I do not use my nitrous that often so I think that I might risk it and I also can control my fuel pressure so I might think about it what do you guys think.I would like to be able to run high 13s with out going turbo, I know I should have got a wet kit. I almost got the new zex wet kit, but it came out the day that I bought this one so I did not know much about it then.
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Old 04-22-2003, 06:34 PM   #5
Supapooh
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I have a zex dry kit as well. I would not run more than a 55 shot as it is. I'm waiting on an svx regulator and wrx fuel pump before I run mine with a 65 shot.. plus I need a new clutch and flywheel like yesterday. No worries though the fidanza and exedy will be in her next month
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Old 04-22-2003, 08:23 PM   #6
Eric SS
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swap and N20. gone. : (

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900psi is optimal
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Old 04-22-2003, 10:05 PM   #7
imprezawd
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Yea I have the same problem with my Venom VCN-2000 setup.
I usually keep the bottle in side my house just to keep in nice and toasty.
But 900-1000 psi is recommended for optimal performance and gains. Even my purge valve wont spray out any N20 to see comming out under or around 600 psi.
I need a bottle heater.
richie
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Old 04-22-2003, 10:15 PM   #8
ImprezaVA
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Arcadia Green

Default N20 bottle Pressure

I was just looking at a Summit Magazine and the "NOS" brand bottle pressure is recommended for 800 psi on a 10lb. bottle. I'm by far not a nitrous expert, but I would assume that the different companies: Nitrous Works, Zex, NOS, Edelbrock, etc. would all have their own recommendations and theories. I might as well learn something here so here is my question: Does the shot you are spraying and the size of the bottle correlate with bottle pressure?

NOS has a NOSzle direct port EFI kit for universal 4 cyl applications for like $943.

-Charles-
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Old 04-22-2003, 11:36 PM   #9
imprezawd
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Ok well Venom says VCN-2000 system utilizes the stock injectors bye pulse them to use more fuel. But how far can the stock injectors go?, and how about my fuel pump ? VENOM vcn -2000 includes a 02 sensor to detarmine if the car is running rich or lean. And when it tends to lean out to much the system shuts off (hopefully) before detonation , etc. I am running a 30% N20 level. I can boost it up to 100% which equals to a 175 hp shot! Venom also says 40% nitrous = 75-95 shot? So i wish i could find out the real deal.. Now the technical assistance guy from venom was saying dont worry abou to much N20 %. Keep going untill u see the system shuts down. Then u know your limit. I was a little scared to do that so i havent./ But he swears by it. He loves the system and never saw a system like this produce NOS peformance #'s and a little more advanced.. I am very please with it.
let me know what you all think

thanks
richie
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Old 04-23-2003, 05:13 PM   #10
Deity
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heck with the bottle pressure, where can I get an adjustable FPR? and how much are they?
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Old 04-23-2003, 11:45 PM   #11
redchris_2020
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I have a weapon r fpr it was on the car when I bought it so I do not know how much it will cost you, There are alot of companies out there that make them you will have to look around
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