eg:R

Need help with tuning Water/Meth Injection. When tuning the car in 3rd gear everything went fine. The Car is boosting 25lbs. Water/Meth Injection start at 8psi and full pressure at 23. when tuning on 4th gear the car seem to get flooded with the injection due to 4th gear taking longer to get to redline and will get more injection compare to 3rd gear run. Running s300.

lyncoors

What mix. It might be running to rich. What is you afr. Lean it out some. 4th gear is where you should be tuning

lyncoors

What size nozzle too

eg:R

i bought the kit used and im not sure on the nozzle size. i was using 100% meth. do you think that could have been the problem? im going to try 50/50 and see how that goes

lyncoors

A smaller nozzle and a mix would fix your issues

eg:R

ok i try 50/50 mix and still has the same problem. not knowing what size nozzle i have should i just get the smallest nozzle they carry?? i think that will be the 60 ml/min or which one will be best for my setup.

lyncoors

what hp are you at and what kit

eg:R

450hp range with a snow performance kit

civic-r11

How is your Hondata s300 running your water/methonal. I am in the process of about to put mine on my car.. and i am wanting my hondata s300 to turn it on and off.. how did you sent up yours???

eg:R

im using mine with the boost box. i think control by voltage to control the flow.

ralph11sec

did you use the voltage output of s300?
where is the nozzle located?

it should be the same in 3rd/4th gear.

Tjabo

What is your AFR with the methanol injecting? This is really pretty straight forward stuff if you just look at it in terms of the basics. Think Lambda for your AFRs (i.e. don't worry about the different stoich ratios for the methanol, just shoot for your basic AFR target of 11.5:1, 12:1 or whatever), and remove fuel from your EMS tune to compensate for the fuel added by your methanol injection.

As mentioned above, if richness is causing the problem, then running a mix will reduce that richness, at the same time as adding a healthy dose of detonation suppression to your setup.

If you're running rich like this, the easiest answer is to simply raise your boost level up some. The detonation resistance you've gained will help keep things safe, the richness will be reduced by the additional air, and you will make big power! ! !

As always though, keep a CLOSE eye on your plugs for any minute signs of detonation.

eg:R

im not using the s300 voltage output source. the nozzle is located 5-6inches before the throttlebody

which nozzle size should i be using with a 450-500hp range?

Tjabo

The answer is "whatever it likes." There are a lot of different ways to approach the whole thing.

Do you have any ideas what the answers might be to the AFR questions I posed above?

welfarepc

try using fuel trim per gear scalers to adjust the AFR in what ever gear you are bogging in.

eg:R

yes, we try leaning out the gas and got to a/f of 12.5 and still get a lot of missfire. the missfire start around 5500rpm and 20lbs of boost.

eg:R

Yes we are using the fuel trim per gear. The car is getting tune by boost by gear. The only thing I can try now is getting the correct nozzle because the one I have in the car is unknown. The kit was bought used and we just ran what ever nozzle that was in there. Can’t get contact of the guy anymore but he was running it in his 350hp turbo integra.

Tjabo

Hmmm. . . That's surprising to me. . . I suspect the methanol injection isn't the cause of the misfires then, other than it does add a lot of liquid to the combustion chamber due to the different stoich point of the methanol.

Could it be possible that you have a spark problem then? Maybe try gapping your plugs a little tighter? What gap have you been running?

Jaker

I had issues with a misfire in the taller gears at around 5,000 rpm (it was pretty bad, struggled to get past those RPMs with full throttle). An MSD fixed the problem for me. It was probably a band-aid fix for a weak coil, but it did fix the issue.

eg:R

spark plugs are gap around 25-27mm. we did a tune without the meth and everything was ok. we just have the rich misfire with the meth.

lyncoors

i still think you nozzle is to big, what kind of car did it come off of,

eg:R

car off a integra b20bvtec that dyno around 350hp. what size nozzle will i need for my setup? i might just have to get the correct nozzle and go from there.

Jaker

A rich mixture is much harder for the ignition system to fire. Oh, and I hope you meant .025-.027" on the gap, otherwise that's your problem for sure.

lyncoors

have you tried a mix because i think that has to be the problem. with 100% meth my car felt sluggish in the higher rpms with a 11.0 afr.went with a 50/50 mix and it felt great and leaned it out to a 12.2. but this was on a 500hp srt-4. on my car now i run 4 DO2 nozzles (direct port) with a 50/50 mix with dsm 450s. (stock block ftl)

Tjabo

Guys, the OP said he leaned it out all the way to 12.5:1. That's pretty darn lean!

I don't know Honda ignition systems at all actually, but I suspect maybe even if his plugs were gapped at 27 thou, they may need to be a bit tighter. . .