Too much meth?

[Zrussian13]

Currently running a snow kit with a single 10g/h nozzle on my hellion twins at 8lbs. Thinking about upping the boost to 9 or 10lbs so I thought about going to a dual nozzle set up and adding a 4g/h nozzle for a total of 14g/h. Snow's chart shows that Im right where I need to be for the boost level/ hp of my car even if I up the boost like I plan to do but I've looked through the old meth threads on here and it seems a lot of guys are running bigger nozzles.

Any advice/ input from guys who have been running meth for a while?
TIA

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[deanm11]

I'm not your target as my build isn't underway yet, but I plan to set up twin 10gph nozzles in my 800rwhp setup. You might want to see the Engine Masters episode (MotorTrend TV) where they run a variety of meth/water mixes and duty cycles. The answer to more power was always more meth. Now the risk of tuning to rely on it as fuel, that's a different call to what may prove to best power. Also, you don't have to max duty cycle or meth mix with you going to total of 14+ gph nozzles..

 

[illtal]

Currently running a snow kit with a single 10g/h nozzle on my hellion twins at 8lbs. Thinking about upping the boost to 9 or 10lbs so I thought about going to a dual nozzle set up and adding a 4g/h nozzle for a total of 14g/h. Snow's chart shows that Im right where I need to be for the boost level/ hp of my car even if I up the boost like I plan to do but I've looked through the old meth threads on here and it seems a lot of guys are running bigger nozzles.

Any advice/ input from guys who have been running meth for a while?
TIA

You will need to make sure that you aren't getting too much of it into the combustion chamber. It does register as fuel and the short terms will pull fuel from the injectors. A general rule is no more than 10% of total fueling.

If you have adjustable duty cycle this can work in your favor having a bigger set of nozzle(s), and lowering the DC. That way your covered to go up.

I am running a much larger 25g/hr single nozzle on a PD. Fuel does get pulled but obviously the path is much different than on a turbo setup.

For reference the 1 g/hr is 63 cc/min

 

[Slow306stang]

I'm running dual 16gph nozzles with no issues.

 

[illtal]

I'm running dual 16gph nozzles with no issues.

You're on big boy boost right? What you you typically race on as far as boost?

 

[andrewtac]

You will need to make sure that you aren't getting too much of it into the combustion chamber. It does register as fuel and the short terms will pull fuel from the injectors. A general rule is no more than 10% of total fueling.

If you have adjustable duty cycle this can work in your favor having a bigger set of nozzle(s), and lowering the DC. That way your covered to go up.

I am running a much larger 25g/hr single nozzle on a PD. Fuel does get pulled but obviously the path is much different than on a turbo setup.

For reference the 1 g/hr is 63 cc/min

Is that 10% apply to the meth only; running 50/50 then it applies to only the 50% or total volume.

Using the ID fuel flow charts I am showing about 210 gal/hour when I plug in my numbers so max of 21 gal/hour of meth if 50/50 mix 42gal/hour?

 

[Chris Barnes]

I was running a 10g/h and 6 g/h nozzle on my P1X 2018 GT. I had maxed out the single 10 g/h nozzle so I added the second and it worked great. I was using an Alky kit, so different adjustment parameters and I didn't have it hitting as hard as with the single nozzle. When I was adjusting it, i simply increased the meth until I starting getting misfire codes. This typically happens as the system really starts to come on strong in the mid range. Probably took me 6 or 8 pulls to get it right and never touched it again. I was at 8.5-9 psi, and the STFT's would typically see 12-14% correction. Lund tuned it and he did NOT remove fuel from the tune, simply allowed it to add timing. I also moved the IAT sensor to the #8 intake runner for him to reference. I see you're in Arizona also, so I feel your pain with our garbage fuel. I'm currently working on an Alky system for my 2020 GT500 on 91 pump. Good luck!

 

[Chris Barnes]

Edit: Forgot to add, I always ran 50/50 distilled water to meth by weight.

 

[illtal]

Is that 10% apply to the meth only; running 50/50 then it applies to only the 50% or total volume.

Using the ID fuel flow charts I am showing about 210 gal/hour when I plug in my numbers so max of 21 gal/hour of meth if 50/50 mix 42gal/hour?

Ah you noticed. it applies to the total amount of fuel added. So if you run 50/50 you can run a bigger nozzle until you start to quench. I use the 10% rule. because the ford PCM can trim 10%. and this way you will 100% avoid quench. Also if you run an alcohol based fuel i would definetely stay under 10% because the stoich is different. you don't want fuel pulled and run lean. It's not so much a problem on a petroleum based fuel .

The real way to run meth on your turbo setup would be to direct port and run like 70% meth, the cylinder cooling is mostly done by water, but meth in a high enough dose will do it alone.

Edit:
Also you may have some 1000cc injectors, but the duty cycle will never approach 100%, that too has to play in to the factoring of how much nozzle(s) you need. If you are up around 90% DC on the injectors, meth will lower the DC of injectors as well. Honestly, moving up or down on nozzle size will depend on when you start to quench or misfire. I never have gotten any quenching or misfires even with a 25% meth peak brand windshield wash mix. With a PD, all the fluid that touches the components almost always gets immediately vaporized, the rest goes out. Running a big nozzle just allows for more of the rest to get in the cylinders. I have thought about running a smaller nozzle, but at this juncture the other nozzle I own is a 35 gal/h so I decided to let it be.

 

[illtal]

I was running a 10g/h and 6 g/h nozzle on my P1X 2018 GT. I had maxed out the single 10 g/h nozzle so I added the second and it worked great. I was using an Alky kit, so different adjustment parameters and I didn't have it hitting as hard as with the single nozzle. When I was adjusting it, i simply increased the meth until I starting getting misfire codes. This typically happens as the system really starts to come on strong in the mid range. Probably took me 6 or 8 pulls to get it right and never touched it again. I was at 8.5-9 psi, and the STFT's would typically see 12-14% correction. Lund tuned it and he did NOT remove fuel from the tune, simply allowed it to add timing. I also moved the IAT sensor to the #8 intake runner for him to reference. I see you're in Arizona also, so I feel your pain with our garbage fuel. I'm currently working on an Alky system for my 2020 GT500 on 91 pump. Good luck!

I am also Lund Tune. I too am on a "standard" tune. You COULD ask for them to tune for the meth, but I wouldn't. The PCM will trim and add timing accordingly. And there are no special considerations for when something that may occur to the meth system. No more flashing a standard tune to save your engine.

I remember you posting up your setup. seem like it worked well for you

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