Just a thought but would mounting the nozzle after the IAT help hold HOM? Putting the nozzle before the IAT means it sees cooler intake temps, cooler intake temps means more timing, more timing means more knock.
well i tryed both and saw a better afr when my nozzle was before the iat sensor.also my knock went down from 5kr to 1.5 by just changing the location of the nozzle
Just a thought but would mounting the nozzle after the IAT help hold HOM? Putting the nozzle before the IAT means it sees cooler intake temps, cooler intake temps means more timing, more timing means more knock.
I ran into this with my 50 trim setup, I ran it after the IAT so the timing wouldn't be increased with the colder intake temps. You got the right idea for sure. To add, I didn't want high timing since I'm running a 50 trim, so this helped keep my timing around 26-28 degree range vs 28-30 running before the IAT sensor.
I don't see why running the nozzle before the IAT sensor would hurt anything? More timing yes, but you're going to run meth which is going to increase octane anyways. You should be just fine depending on how much meth you run.
Yeah, now I'm lost. . . More timing is better, right? You guys are running knock sensors, so if the additional timing was causing knock, wouldn't it get pulled back?
well i tryed both and saw a better afr when my nozzle was before the iat sensor.also my knock went down from 5kr to 1.5 by just changing the location of the nozzle
This paints a little different picture though, because this looks like 3.5 degrees extra was getting pulled, which compares pretty closely with the timing advance gained through having the methanol cooling the IAT sensor.
well i tryed both and saw a better afr when my nozzle was before the iat sensor.also my knock went down from 5kr to 1.5 by just changing the location of the nozzle
You reduced your knock count by 3.5 by changing the location of your nozzle from where to where?
Yeah, now I'm lost. . . More timing is better, right? You guys are running knock sensors, so if the additional timing was causing knock, wouldn't it get pulled back?
More timing isn't always better because it means more knock. Yes it will pull back timing, its called the knock count, but it might also hurt your motor first. And if you have HOM then it will kick you out of hom.
More timing isn't always better because SOMETIMES it means more knock. Yes it will pull back timing IF IT SENSES ENOUGH KNOCK, its called the knock count, but it might also hurt your motor first. And if you have HOM then it will kick you out of hom IF IT KNOCKS ENOUGH.
Maybe that is a bit better?
What you didn't say that I think is more true than most of this is that timing advanced beyond MBT is disadvantageous, even without knock. What I was hoping someone would post is that the SRT-4 engine is not knock limited with its low compression ratio, so the advance values in the tables are already optimized for MBT at true air temps.
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Why mount nozzle before the IAT?
Linear Mode
