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Old 06-08-2007, 01:54 AM   #1
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timing issues?

i dont know a lot about nitrous but a few of my buddies run it in there mustangs and camaros. one issue they have is timing. for example we just hooked up a zex kit on a mustang, a 75 shot ran fine but he jumped it to a 125 and it didnt hit like it should so he called zex and they said he needs to take like 4 degrees timing out. is this something that needs to be considered with our trucks to?

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Old 06-08-2007, 08:39 AM   #2
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timing issues?

The zex kit for the trucks is a wet system that is controlled by activation at wide open throttle that mixes fuel with the nitrous for detonation reasons. Some of the other Zex kits are a dry kit (all nitrous). Dyno's on the Zex like the one I have with a 150 shot have shown that you get pretty much all of the 150, you may want to pull timing so you dont run lean by simply hitting the tow/haul button and not using the 91 tune on the Superchips. Your best option is to insall an active wide band A/F guage and just to some testing. Different mods will effect how or what you need to do when you spray. For instance with my mods I can spray up to a 125 shot with the 91 tune on the Superchips, but I only know this due to being able to monitor my air/fuel mixture. The Zex kit for our trucks also has a built in safety system that will not allow for you to run lean.
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Old 06-08-2007, 02:52 PM   #3
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timing issues?

what you mean by not allowing us to run lean is a fuel safety switch. Right? Where the fuel pressure drops, the actual box shuts off the nitrous?
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Old 06-08-2007, 02:54 PM   #4
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timing issues?

You are 100% correct on the timing central. I ran 125 shot on my truck with colder plugs, the superchips at 87 and never had a problem. The truck pulled like crazy. With headers and Efan and a better suspension setup, I might hit 12s
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Old 06-09-2007, 09:48 AM   #5
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timing issues?

I just run on 87 mode. My A/F goes down to 9.0:1
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Old 06-09-2007, 01:41 PM   #6
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timing issues?

how does your truck perform with the AFR of 9.0, if mine goes below 12 it feels like a parachute opened up out back, my remote opener messed up and was restricting the flow my afr's went to 10.9 i might as well have shifted to neutral and coasted for how much it bogged.
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Old 06-09-2007, 02:07 PM   #7
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timing issues?

It works fine. I run out of gear well before the 1000 ft. I'm not really sure how to tune with the PSC because it can't read my rpms right and I don't know if it matters or not.
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Old 06-10-2007, 01:50 PM   #8
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timing issues?

yeah, if your truck is runnin at 9.0, you need to lean it up... low 12.0's and that thing would scream.
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Old 06-11-2007, 09:32 AM   #9
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timing issues?

just put a toggle on your fuel pump...that way..you can just turn it off when you go rich..LOL
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Old 06-11-2007, 09:38 AM   #10
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timing issues?

Yeah I know it needs to be tuned. I am going to do that this week sometime.
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