For those with Methanol Injecton...I need help!
What am I doing wrong. I have a 150psi system with a single M8 injector located before the intercooler/after the supercharger. I'm running 50/50 meth/water.
My dyno operator said I needed to run straight water because the meth, along with the cooler IAT's, are making my car too rich. It makes sense imo but I want your opinions as well.
Any ideas?
On a side note, he said in another thread:
Last edited by urbamworm; Sep 21, 2011 at 12:33 AM.
He also said his car runs 12.4 using his wideband o2 sensor and gauge setup and then goes "about 1 point" (so I assume around 11.4) with the meth turned on. I am not sure if he runs water or meth or both though, and like I said he is on a stock tune when saying this.
And more info on Sneakyneons setup which runs meth injection and the mods mentioned above.
runs 18-19 degree's at wot
I had two adjustments to the tune and was out of fuel so I feel there is ALOT left in it.
ya I guess it makes ok TQ....
Last edited by urbamworm; Sep 21, 2011 at 12:39 AM.
And more info on Sneakyneons setup which runs meth injection and the mods mentioned above.
His intake temps stay ridiculously low at 85*

If you have 10psi with 50* air then you have to dump more fuel just to keep the air/fuel ratio the same since the air is denser.
In the case of water injection, you have cooler air but it's not any denser so the ecu will add more fuel to compensate for something that's not there...it's very different from dumping fuel to lower the A/F ratio when AIT's are high.
Ive tried one nozzle and two, Ive had it pre IC and post and my current is a M3 pre TB and a #7 pre IC. the difference is around 30 degrees having it pre IC vs Post, I moved mine for 2 reasons, one I wanted a more accurate picture of IAT temps and also I had gone through 2 map sensors in a years time frame
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I don't have the torque readings for that first run since it had trouble reading the rpm pickup...in later dyno's I saw a maximum of 567wtrq no meth.
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Did you test the system at all before the dyno? It doesn't seem like you have IAT data but I'm surprised that the AFR changed that much. You sure you have good meth and the right jet. Also when are you activating it?
Did you test the system at all before the dyno? It doesn't seem like you have IAT data but I'm surprised that the AFR changed that much. You sure you have good meth and the right jet. Also when are you activating it?
I have a question though, do you have upgraded injectors? If not, then that could explain it since the oem injectors would be maxed out and they can't add any more fuel due to lower IAT's. I you have larger injectors than I have no clue.
did they do it threw the roller speed?your numbers are skewed becasue your not using a 1:1 ratio.You might of not lost as much power as you think from the meth,but that a/f dont lie.
you got just as rich as I did,actually mine hit 10.0 on the first COLD run.
checking my plugs tome and tearing it apart,this thing is going to bug me all night.try running 25% meth and 75% water since we only want to drop temps and dont really need the timing advance we can run with adding meth.
did they do it threw the roller speed?your numbers are skewed becasue your not using a 1:1 ratio.You might of not lost as much power as you think from the meth,but that a/f dont lie.
you got just as rich as I did,actually mine hit 10.0 on the first COLD run.
checking my plugs tome and tearing it apart,this thing is going to bug me all night.try running 25% meth and 75% water since we only want to drop temps and dont really need the timing advance we can run with adding meth.
4th gear next time 1:1 kiddo!!! you know this lol
we messed around once and I dynod my car in second gear and it made 664rwt bone stock!!!
Last edited by skratch77; Sep 21, 2011 at 01:26 AM.
I have a question though, do you have upgraded injectors? If not, then that could explain it since the oem injectors would be maxed out and they can't add any more fuel due to lower IAT's. I you have larger injectors than I have no clue.
How do you explain these 3rd and 4th gear tests from my GTI?


That wouldn't be possible if what you said were true.
Last edited by GT-ER; Sep 21, 2011 at 01:38 AM.
I have no clue as to what's going on then...maybe it's the tune?
I'm going to try straight water tomorrow.
Last edited by GT-ER; Sep 21, 2011 at 01:40 AM.
you are making more power everywhere and hit the same peak power.
I have the dyno of my stock car making 66x torque when we did a second gear run.the drum accelerated insanly fast and thats what the thing registered.
we cant compare our top ends this way to see drop off power.
im using 4th gear and seting up the dyno to read rpms
yours is in 3rd with no rpm signal and using roller speed
Last edited by skratch77; Sep 21, 2011 at 01:50 AM.
you are making more power everywhere and hit the same peak power.
I have the dyno of my stock car making 66x torque when we did a second gear run.the drum accelerated insanly fast and thats what the thing registered.
BTW- I've dyno'd cars in 2nd gear as well...guess what...same numbers. The numbers will skew slightly but it's usually just a few hp ( 3-4whp ) due to the inaccuracy of the dyno and it only guessing your true ratio. As stated before...the dyno CANNOT use rpms to assist in calculating horsepower...it simply can't do it.
This topic is about my issues with the meth setup...not if I "cheated" or not by using 3rd gear. Please stop trying to drift from the point of this topic.
If it makes you feel better to dyno in 4th then be my guest.
Last edited by GT-ER; Sep 21, 2011 at 02:06 AM.




Rememeber, you are crowding out air by injecting h20 / w:m... as the water is replacing the air that would otherwise be there, so you will run richer... I would reduce the amount of w:m / h20 you are running and see how it goes. Aim is to cool; not affect a:f too much.
Also guys re power measurement.... Power is just the rate of torque delivery... a longer gear will spin a drum faster but with less torque and vice versa (i.e. power should be the same...), the cars gearing should be irrelevant although having it match the crank speed to the wheel speed gives a more consistent and accurate crank HP estimate.
Last edited by stevebez; Sep 21, 2011 at 06:03 AM.
I am planning in changing the nozzle location from Pre IC to Post IC. I also install a nozzle just after TB and Pre SC with D03 = 189 cc/min.
I didn't notice cooling a lot is it because I change the nozzle size from 550 cc/min to 315 cc/min? But I should have a list notice a drop in IAT but I didn't. My new nozzle will be D07 with 441 cc/min and that will be Post IC this time and I will see how it goes. So no more Pre IC injection. I am pretty sure that I have a lot in my car even without the w/m I go around 10.6 AFR.
Rememeber, you are crowding out air by injecting h20 / w:m... as the water is replacing the air that would otherwise be there, so you will run richer... I would reduce the amount of w:m / h20 you are running and see how it goes. Aim is to cool; not affect a:f too much.
Also guys re power measurement.... Power is just the rate of torque delivery... a longer gear will spin a drum faster but with less torque and vice versa (i.e. power should be the same...), the cars gearing should be irrelevant although having it match the crank speed to the wheel speed gives a more consistent and accurate crank HP estimate.
I am planning in changing the nozzle location from Pre IC to Post IC. I also install a nozzle just after TB and Pre SC with D03 = 189 cc/min.
I didn't notice cooling a lot is it because I change the nozzle size from 550 cc/min to 315 cc/min? But I should have a list notice a drop in IAT but I didn't. My new nozzle will be D07 with 441 cc/min and that will be Post IC this time and I will see how it goes. So no more Pre IC injection. I am pretty sure that I have a lot in my car even without the w/m I go around 10.6 AFR.
Damn...I need answers...lollll.
I am thinking that your mixture might be more meth than water and that is causes the richness to occur. It is also very important where you setup the nozzles as I spoke to Alan (bassn_07) in length about it. Let me see if I can dig through my pm's for it.



