113 replies to this topic

[Truckzilla46]

I have been really considering once my tuning issues were figured out adding meth injection. Well I am getting close so what's your input?

From what I gather it's actually a safety feature.

Also wouldn't it make your cars tune more stable with temp changes? What do you guys think?

[Harrison@Stage6]

We don't use meth on any of our builds. We use a quality intercooler instead. We don't like the idea of changing a tune to run it. What if the pump goes out like it did on a buddies Jeep. Bye bye engine. Too many variables to deal with. We like simple builds. They work better.

[345_CHLNGR]

It does turn Shit Gas into High Octane Race Fuel. Most tuners and builders don't like to use because it is one more variable that they can't control. Others will say that it will take 2 nozzles to get the full affect.
The bottom line is it works if you want to babysit it.

[Illinois Chaos]

Do it and don't tune for it. There are other benefits, like cooling the intake charge, acting as a fuel if your a/f goes lean. Keeps your intake and motor clean and deposit free too.

[srt5939]

N20 

Do it and don't tune for it. There are other benefits, like cooling the intake charge, acting as a fuel if your a/f goes lean. Keeps your intake and motor clean and deposit free too.

how do you not tune for water going into the engine cooling it down?

[Speedy]

Meth injection effectively raises the octane of what's in the cylinders and cools them as the water mist turns in to vapor, grabbing heat and flowing it out the exhaust.  The meth being sprayed in to the combustion chamber richens the mix.  So instead of having a 11.5 AFR you'd have a 10.5.  To "tune" for it you'd lean the fuel out to get it back to 11.5.  The problem comes if there is ever a failure in the system, the AFR suddenly becomes 12.5 and bye bye engine.

 

I agree with Stewart, it's a potentially nice to have if you're willing to monitor the system.  There are some fail safes available in some kits that will open a solenoid (on the bypass perhaps) to remove boost if the system has any problems, but I'm with Harrison on the KISS. 

 

Run a bit richer AFR in the summer (11.2 - 11.4) and a bit leaner in winter (11.6 - 11.8) and call it good.  That's what I do on both my FI vehicles.

[Truckzilla46]

Damn some very good points I did not think about. I REALY don't want to babysit the car. Guess that explains why I don't hear more using it. I had seen in other threads comments of just throwing a 50 or 75 shot of nos which was another thought of mine to research.

[2012srt8]

You could use only 100% water and just cool the intake charge. No need to tune for that or monitor really

[Fastrt09]

You have to tune for it no matter what but you don't have to use the the full size nozzle your suppose to run. I'm using a smaller nozzle and Mike still has to tune for because it comes on so strong. I watch my afr all the time so I'm not to worried about it. If it helps keep the motor safe at 9lbs I'm all for it

[noremac]

I know that water works, but it just seems wrong to spray water into the intake

[345_CHLNGR]

You have to tune for it no matter what but you don't have to use the the full size nozzle your suppose to run. I'm using a smaller nozzle and Mike still has to tune for because it comes on so strong. I watch my afr all the time so I'm not to worried about it. If it helps keep the motor safe at 9lbs I'm all for it

9lbs why not do 12lbs

[Illinois Chaos]

N20 

how do you not tune for water going into the engine cooling it down?

 

 

There are around 30 + HP gains to be had if you tune for it and I don't. My solenoid can fail and my pistons won't do the hat dance. 

[closeracing]

We don't use meth on any of our builds. We use a quality intercooler instead. We don't like the idea of changing a tune to run it. What if the pump goes out like it did on a buddies Jeep. Bye bye engine. Too many variables to deal with. We like simple builds. They work better.

What kit was it that had the pump failure? Just curious, I dont doubt you, you're just the first guy I've seen that actually witnessed a pump failure first hand. I was worried about it too so I talked to Johan, he doesn't recommend tuning for it either, but has only seen failures due to people letting the tank run dry.

On another note there are people around here making huge #'s running 91 pump and pure meth in the system. One guy gained 100 whp on an ls. another is pushing 958whp. It works, just don't know if I'd tune for it unless you had a tune that was for track use only

[Fastrt09]

9lbs why not do 12lbs

I'd like to keep my motor for awhile

[BJB]

If you go with a properly sized intercooler you don't have to worry about a $7.00 windshield washer pump going out...

[srt5939]

There are around 30 + HP gains to be had if you tune for it and I don't. My solenoid can fail and my pistons won't do the hat dance. 

you still have tune for it or you will be fowling out plugs once a month with the rich AF. I don't understand the comment don't tune for it.

 

You can't spray shit in the car and not tune for it and expect it to run the same on the same tune.

[closeracing]

If you go with a properly sized intercooler you don't have to worry about a $7.00 windshield washer pump going out...

I doubt you'd see the same gains at the track unless you added race fuel to the intercooler equation. I know snow performance has a big pump  on their stage 3 and they warranty it for life. Have you ever seen one fail?  I have one and I'd honestly like to know

[Speedy]

If you're gonna use water meth you wouldn't even need race gas at the track.  It's the equivalent of about 116 octane.

[345_CHLNGR]

I'll keep my $7 washer pump:-)

[BJB]

I'll keep my $7 washer pump:-)

Looks like your tank is empty!!