2nd Generation Specific 1986-1992 Discussion

Nitrous On A S5 N/a

Old 01-26-2004, 09:47 AM
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has anyone run nitrous on a n/a? I'm thinking of what I want to do to my car, since my engine will be gone soon....I was think about just doing a nice little 50 shot on a stock mazda remanufactured engine
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Old 01-26-2004, 12:57 PM
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I have run it on my n/a don't go over a 75hp shot , i would start with a 35hp and work your way up to a 50hp.
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Old 01-26-2004, 01:05 PM
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When you ran the Nitrous, did you do dry or wet setup? Did you use the stock ECU or did you put in an aftermarket computer like Haltech or something like that?
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Old 01-26-2004, 01:05 PM
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in the faq section: link

I don't know if that'll help, but still some good info.
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Old 01-26-2004, 02:05 PM
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FC3S.org has a write up on the install of the Summit wet kit. Although I cannot access their site at this time.



With a wet kit you do not need any additional fuel controllers, as the additional fuel needed is injected along with the nitrous. I think the kit lists for like $499.
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Old 01-26-2004, 03:45 PM
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i like the wet kit and i had a stock ecu.
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Old 01-26-2004, 04:02 PM
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Okay SPD...



I read the FAQ and the guy mentioned that no matter what an upgraded fuel pump is needed with a higher flowing fuel pressure regulator or the Turbo fuel pump resistor pack? Did you use any of this?



Last thing I would want to do is pop my engine because it was running too lean under high stress...
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Old 01-26-2004, 05:27 PM
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I ran a direct port 100 shot with the stock ecu. Ran 14 flat with slipping clutch and spinning the tires through 3rd. Definitely get the walbro fuel pump but i didnt need an aftermarket fuel pressure regulator.
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Old 01-26-2004, 07:11 PM
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Run a wet setup. Dont go near a dry one. Your injectors are working hard enough they will not handle the extra fuel you need for N2O.



I ran a 75 shot wet on my 90GTU. I jetted the fuel 2 pills larger than they called for this way I was sure I was running rich.



I would be worth the money to dyno it and make sure its not lean.
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Old 01-27-2004, 01:12 AM
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Originally Posted by Baldy' date='Jan 26 2004, 11:05 AM
in the faq section: link

I don't know if that'll help, but still some good info.
If it didn't help, the author is right here to answer any specific questions.



The problem with an N/A engine is not so much forcing nitrous through it; the stock block is PLENTY strong. Its what surrounds the block... the ignition retard, the exhaust, the intake, the fuel system, and namely: the drivetrain.



To run a 50 shot:

-get an upgraded fuel pump, such as a walboro, and install it. If you are alright with running rich at idle and low load, then so be it; if not, take corrective action. Chances are, you'll be fine running it as is (the write-up is written as a "perfect" install).

-get a wet single fogger kit. Don't bother with dry; FMU's are a total pain in the *** and limit the system.

-Wire the system for WOT-only activation, and don't engage below 4000 (when aux. ports are closed).

-run high-octane gas whenever you want to engage the system.

-Upgrade to full exhaust and an intake.

and.... get an upgraded clutch. You'll need it.



That's all there is to it. When you get to that point, let me know, and I'll let you know how to tune it.
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