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 Nitrous system fuel pressure regulator problem 
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Joined: Fri Feb 08, 2013 2:37 pm
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Nitrous system fuel pressure regulator problem


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last test hit on last race 161 mph.rpk [277.45 KiB]
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Fri Oct 14, 2016 3:09 am
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Joined: Thu May 08, 2014 7:47 pm
Posts: 235
can we get a screen shot? I can't open the file.


Sat Oct 29, 2016 4:16 pm
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Joined: Fri Feb 08, 2013 2:37 pm
Posts: 1744
It will open if you have Racepak software in your computer. You may need to save it to a download folder and open it from there.


Sat Oct 29, 2016 8:30 pm
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Joined: Thu May 08, 2014 7:47 pm
Posts: 235
is there 2 stages of nitrous? or is one of those fuel pressure?


Sun Oct 30, 2016 5:48 pm
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Joined: Fri Feb 08, 2013 2:37 pm
Posts: 1744
The two fuel pressures are nitrous stages. The pump bypass pressure, head pressure on the regulators, was 28 PSI. Running the 2nd stage alone it does the same thing with three different new 12-803 regulators.


Sun Oct 30, 2016 6:46 pm
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Joined: Thu May 08, 2014 7:47 pm
Posts: 235
The first stage fuel pressure looks good.

The second stage fuel pressure regulator looks to be "hammering"???

I have seen 12-803 do this before.

is this a dead headed fuel system feeding 2 n2o systems?

Or a return style system?


Tue Nov 01, 2016 2:52 am
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Joined: Thu May 08, 2014 7:47 pm
Posts: 235
i like to feed multiple stages threw a fuel log, feeding the fuel noids, with one regulator off the end of the log controlling the bypass pressure. good, stable, steady state, and quick recovery.

The second stage is hammering/bouncing the diaphragm ball on the seat. i am surprised its not affecting the first stage fuel pressure.

The oscillation of fuel pressure swinging like that, is what has the air fuel ratio doing the same thing.

I will run the same pressure to all systems alot.

then i go something like this with the fuel jets as an example....

1st stage. 30n/28f
+
2nd stage. 30n/27f alll systems stacked and flowing 900psi of n2o and 6psi fuel
+
3rd stage. 30n/26f


Tue Nov 01, 2016 4:03 pm
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