N2O Timing Question
N2O Timing Question I read this in a thread in the Nitrous forum. Could somebody please shed some light on it for me? I'm looking at spraying in the future and this could be the answer I've been looking for.
Thanks in advance.
Originally Posted by HD1911
u guys need to find a good tuner who knows his ****...you can run hellatious timing in NA, then run a wire to the PCM from the nitrous arm switch that senses when the nitrous is armed, and Voila! an alternate operating program on your PCM takes over for the nitrous with retarded timing, etc. You see, you get the best of both worlds.
i was wondering if it could be done with a resistor on the iat sensor that is close to 40 ohms which would read somewhere around 300* and make the tune take away the degrees needed. then take away the resistor for reg high motor timing. i want to try a **** like what is used on volume controlls that has a max of 5 k ohms wich is 45 * give or try. crazy idea hopfully it works
I know in the L67 community they can add a table into the PCM and they sell what used to be called "Happy ****" and it was a simple **** that does just what you're describing. Plugs inline with the IAT. I forget the range of adjustment, but it should be plenty for what the majority of the average LS1 N2O users would be spraying.
I'm just trying to figure out how to have max N/A power and safe timing with N2O usage without spending hundreds of dollars on tuning software (I don't know how to tune) so it would be a matter of having someone do 2 separate comprehensive dyno tunes that I would have to flash to the PCM. Can we say inconvenient? So the only other option is the Timing Tuner, and that's a little more than I want to spend as well. Man... Sometimes I miss distributors...
I'm just trying to figure out how to have max N/A power and safe timing with N2O usage without spending hundreds of dollars on tuning software (I don't know how to tune) so it would be a matter of having someone do 2 separate comprehensive dyno tunes that I would have to flash to the PCM. Can we say inconvenient? So the only other option is the Timing Tuner, and that's a little more than I want to spend as well. Man... Sometimes I miss distributors...
Originally Posted by Demon_Speeding
I read this in a thread in the Nitrous forum. Could somebody please shed some light on it for me? I'm looking at spraying in the future and this could be the answer I've been looking for.
Thanks in advance.
Thanks in advance.
AFAIK, not all model years can be configured to do this. If I remember right, I think the 2002 model PCMs (F-body) can be configured for this. I am positive that the 98 PCMs can't (looked into this in the past
). Also, EFI Live does support custom OS. Not sure about other companies like HP Tuners.
As far as using a resistor, I believe that only applies to dry systems, not wet. Maybe someone could confirm that for me.
Hope this helps a little.
Brian
From what I understand it works for the '99 - '02 PCMs. I'll have to dig around. I remember not long after I bought my car it was discussed in different places as far as plugging a resistor into the IAT plug for more aggressive timing. If that works, in theory changing the resistance you could plug a different ohm resistor and have it retard timing. It might take some time to figure out, but it could work. I think the only trouble is, that it might not pull enough out. I mean for someone with a H/C setup that's been dyno tuned, chances are the tuner has added more timing than what will be able to be pulled out with a resistor.
i had edit b4 and you could take timing depending on how high the iat was now with a resistor that would read 300* you could set it to take out x amout of deg for that ait. and maybe take away 0 deg at x deg. thats when you would use the **** to make the change. you would just need to know where the temp would be for certain ohms. and where to stop on the ****
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Originally Posted by Demon_Speeding
I know in the L67 community they can add a table into the PCM and they sell what used to be called "Happy ****" and it was a simple **** that does just what you're describing. Plugs inline with the IAT. I forget the range of adjustment, but it should be plenty for what the majority of the average LS1 N2O users would be spraying.