I have been running 80 PSI since I got the kit, and since I have my wideband, I'm able to more accurately see my air/fuel curve. Today I lowered it to 75 PSI with these results:
My peak A/F number now is 12.83 (During VTEC engagement) This number is pretty decent right? Also, should I try lowering it to 70 or 72, or do you think I should keep it at this?
If it were me, I would not lower the pressure anymore. 12.83:1, IMO, is starting to get on the lean side. If it were me I would bump up the static pressure 1 or 2 psi and check the a/f again. With the higher octane available to you, and the the J&S in place to alert you of any problems, I would think you are going to be ok.
Do you have vtec set around 4k rpm? That's what it looks like from the graph. You will go leaner when the high cam lobes kick in.
My VTEC is set at 4,500 RPM... If I lower it to 4,000, would that smooth out the power curve, resulting in less lean crossover? Bump UP my FP? to 77? or down to 73?
Woops, I forgot those were just incremental numbers at the bottom of the graph, not rpm That jump in a/f is probably where you have vtec set.
I'm currently running vtec at 3800. The Hondata base map runs vtec at 3000
The BEST way to set your vtec engagement is on a dyno. With that said, I have been playing with my engagement quite a bit with just my wideband and how it "feels". You'll have to use your judgement on that.
Yes, I meant raise, not lower, your pressure, see if you can get your peak a/f to about 12.5:1.
80 felt fine.. It did seem to dump a lot of black soot on my bumper like it was running super rich... Also I was getting like 240 miles per tank highway.. Mainly, I'm afraid of the pressure being to high on the fuel system, is that a viable worry?
The pressure is pretty much too high, regardless, in my opinion (which is why I never ran the JR setup). So it's really something you need not worry about since you are stuck with it in that setup.
Since you have the wideband, see what happens at pressures betweeen 75 and 80. Couldn't hurt, and you might find that you can run a little less than 80.
Check it out, Xmas and my bday is coming up.. and my family is askin' what I want.. so I can get like a cartech FMU or injectors if I asked.. but the question is, is it worth it, considering how I'm not running real lean? And I'll fool around with the static FP to see what works... (BTW u got some frickin' quick response time on those replys, u must be a looser like me, LOL)
LOL, I'm at home sick, just sitting in front of my comp instead of doing my homework
Upgrading at this point is up to you. Your setup is certainly capable of keeping the a/f where it should be. If you feel uncomfortable with the high fuel pressures, that would be a good reason to upgrade your setup.
i would leave it at 75psi. at 75 you're between 12.0 and 12.5:1 throughout that graph, you have good gas, and a j&s.
what kind of peak fuel pressures are you getting at 80psi? have you run it at 70psi? i wouldn't be entirely surprised if there is very little difference in the actual amount of fuel being delivered between 70 and 80psi static because the flow rate of the pump is dropping like a rock past 100psi.
that wideband setup ROCKS. i am tempted to get it and a vafc for my s2k just to amuse myself!!!!!!
Why am I getting leaner with 80 PSI now? :-(
I noticed 3 things today..
1)I checked my static FP, the pressure was lower at first. I then pulled the vacuum hose, and it read 77 (This was after I set it bcak to 80), a few seconds later it read 80... Bad FPR??
2)I went to set my VTEC lower (from 4500 -> 3800) on my V-AFC, I then monitored the engagement point.. it didn't say VTi-ON until I hit well over 4000RPM (Is it supposed to say "On" right away?)
3)My first 3 speeds for the heater/ac have dissapeared.. It only works on HI (Even kicks in the A/C on the lower speeds, but no blower.
If anyone could give me any direction, it would be appreciated...
i really believe that the inconsistencies you are seeing are because the fuel system is not designed to run at 110psi. this is why i suggested you try 70psi, which should put you in the 100-110 psi range at WOT. this should be more consistent. at 120psi i wouldn't be surprised if you're getting different fuel delivery depending on a wide range of factors that affect the pump's true limit - voltage, temperature, density of the fuel, blah blah blah blah
Schwett,
I bought a electric FP gauge from Guy, and I got a brand new replacement from Autometer (Recall) At any rate, I haven't been able to install it yet, but I'll soon have that so I can see what FP I'm at during boost... About the 70 PSI, I'm about to try that now (And wake up the neighbors!)
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That jump in a/f is probably where you have vtec set.
Linear Mode
