My car is tuned and I wanted to run meth with the smallest nozzle to prevent detonation when I'm at full throttle I'm at 10s on the afr .....but it's hot pass hell and I thought it would help

 

Have you considered using just water?

 

I have but just touching the meth feels super cool and would help but I'm not gonna raising boost or anything just as a safety feature I believe the smallest injector on aem is 125cc

 

What boost level are you running now?
What does your iginition setup look like?
And why are you tuned in the 10's?

 

I'm running 20psi with the 4 mid coil packs for the micrtech and I told the tuner to then it safe cause I went through a blown motor cause my last Tuner

 

msd coil packs

 

What gas are you running?

 

93 octane .......just want to know what will happen will it hurt or help and if it hurts what will it do.......not spraying for power just for safety but heard meth is better then water

 

When I had mine tuned I was told it wasn't safe to run over 14psi boost on pump gas. I would deffinatly at least run water and lean it out some with that boost level, it would be safer that just pump gas

 

From my experience, 20psi without AI is dangerous. Your "tuner" is using fuel and rich afr's for cooling and detonation suppression. 12:1 at 15psi would likely make the same power, be cleaner and run better. From there, a simpe 150cc shot of 50/50 wont over richen your mixture.

 

water is a better knock suppressor than even the best alcohol. basics: AI based for power versus reliability use either strictly alcohol or a 49/51 blend with water. for AI based on reliability use 100% water.

 

so ok 100% water is better then 49/51 mix for reliability...got it

 

It's fine to run without specifically tuning for water (as long as you don't overdo it), but being in the 10's is too rich. But I wouldn't go past 16 on pump by itself. I'd tune to 16psi on pump, and then turn the water on and tune the rest of the way up.

Running at full boost and AFR at 11.5 is plenty safe, you are leaving a lot of power on the table, and being too rich isn't a good thing either.

Tuning with water off and going past 16psi is risky, even if the AFR's are under 11. Are you logging your egt's? going into the high teens without watching EGT is risky as hell. Your AFR can be fine, but you can still ruin the engine.

 

keep in mind down south they have 93AKI which is good for about 22-23psi max so 20psi is about as high as you should push with that pump fuel and is bordering into auto ignition area.

don't quote me though, check the pumps and make sure.