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Old 05-18-2002, 02:43 PM   #1
HudsoN456
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Member#: 11462
Join Date: Oct 2001
Location: Syracuse Area, NY
Vehicle:
1999 Integra GS-R
Super Sonic Blue Pearl

Default Nitrous Dry Kit question

How does a universal dry kit add fuel to balance the increase in air volume and oxygen density? Does the kit interface with the fuel pressure regulator or are the stock sensors in the car (MAF, MAS, etc) responsible for adding additional fuel?

Also, can nitrous be injected BEFORE the air filter for similar gains as if it were injected closer to the throttle body?

Thanks

Adam
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Old 05-18-2002, 06:02 PM   #2
Gerry
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Adam..A dry kit does not use add fuel. Hence a "dry "system It uses the the stock fuel system to run the engine. A wet system would use it's own fuel/NO2 dedicated system to add hp. With a wet system you could tap into the fuel line that goes to the injector rail. Then use a fuel pressure regulator to bring the pressure down to 12psi and plumb it into the fuel solonoid.
As for injecting nitrous before the air filter??? WHY? My oponion would be to plumb it into the intercooler."to cool the air" or rite before the throttle body.. That's if you are using a dry system....Gerry
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Old 05-19-2002, 12:27 AM   #3
HudsoN456
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Default

Right, but does the ECU detect this change in air mass and add more fuel BY ITSELF? (without the aid of the nitrous components?)
If this is the case, is the ECU and its sensors precise enough to detect this change quickly to add this additional fuel in time for combustion?
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Old 05-19-2002, 03:39 AM   #4
JulianH
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Quote:
Originally posted by HudsoN456
Right, but does the ECU detect this change in air mass and add more fuel BY ITSELF? (without the aid of the nitrous components?)
If this is the case, is the ECU and its sensors precise enough to detect this change quickly to add this additional fuel in time for combustion?
No. The kit adds fuel by increasing fuel pressure via the FPR. You want the ECU to have as little to do with this operation as possible... it won't have any idea what to do when the N2O kicks in.

JulianH
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Old 05-19-2002, 04:08 AM   #5
Eric SS
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swap and N20. gone. : (

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I'm not going to get into it again because I've argued in many-a-threads that you can search for but I woudl stay away fro ma dry kit.
just my $.02

Eric
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Old 05-19-2002, 08:30 AM   #6
Kevin Thomas
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Default Re: Nitrous Dry Kit question

Quote:
Originally posted by HudsoN456
Also, can nitrous be injected BEFORE the air filter for similar gains as if it were injected closer to the throttle body?

Thanks

Adam
Gains will not be similar. The reason for this is that the nitrous would have to travel through the intake to get to the throttle body, to get to the cylinders. In this travelling, it can pick up heat along the way through the intake piping.

Injecting nitrous into the throttle body eliminates this travelling and potential of picking up heat. You'd get as cold a nitrous as possible into the cylinders (with a dry setup.....an even better setup would be a direct port setup), helping to eliminate detonation.

Also, injecting before the air filter shouldn't yield any more gains than if you were riding around with a cold-air intake on a freezing winter night. I would believe anyway.
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Old 05-19-2002, 03:08 PM   #7
HudsoN456
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Super Sonic Blue Pearl

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What happens if you do not connect the part of the kit that raises the fuel pressure? Will the ECU TRY to detect the change in airflow and correct the fuel? Or will the car run horribly lean and possibly knock? Also, does a 50 shot of nitrous even need more fuel?
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Old 05-19-2002, 04:00 PM   #8
Eric SS
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Location: 2013 335i, 2011 G37 coupe
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2000 2.5RS w/ EJ22T
swap and N20. gone. : (

Default

If you don;t connect the part in a dry kit that raises the fuel pressure, get ready for some fireworks.

Eric
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