LilJayV10

iTrader: (39)

I understand the concept of meth or meth/water to cool the intake air temps down which increase power.

Does the power increase come from just the intake temps being lower or does the meth actually act as fuel too?

Can meth be used as a type of safety net? What I mean is I know people have it come on at a certain boost level to cool things down and make more power.

Let's say I want to run 8-10lbs on a stock short block from a single turbo. Is there a way to turn the meth on if the IAT's get to high to try and prevent burning up a piston or ring lands.

It wouldn't be used as a power adder just to keep things safe.

Would you have to tune for that? When the meth comes on does it throw the tune out of wack?

Sorry for the newbie questions. I appreciate any answers.

Grr

iTrader: (2)

It does have benefits of cooler air and as a fuel. And if you want to use it as a saftey net, the turbo buick guys have a new controller coming out later this year that is basically a full stand alone fuel computer for meth. You can use wide band tracking, IAT on and off, throttle position, knock sensor monitoring, pretty much anything you want and command it to adjust accordingly. Ill be sure to have the info put up over here once they are done testing
Gary

LilJayV10

iTrader: (39)

Wow that sounds interesting. Turbo Buick guys are like a bunch of Willie Coyotes, they are always coming up with great stuff.

ninetres

iTrader: (35)

Meth cools the intake charge (adding power) and raises makes it safer to run more agressive timing (adding power). Just use an alkycontrol kit.

Lawnboy

iTrader: (54)

Alkycontrol is the way to go ,

Avengeance

iTrader: (4)

Meth does both.. it cools intake charge and adds a lot of octane. So... you gain power with the ability to run more aggressive timing simply because of its octane boosting abilities. Some people use it as a cooler... and leave their timing alone... but either way once you tune with/for meth youre taking a chance.

Some people put the meth injection before the IAT and then tune the car... because once the IAT sensor sees meth it will correct timing. So if you tune in more timing considering the IAT sees meth then if the meth ever fails the car will not add timing... meaning less chance of popping your motor.

LilJayV10

iTrader: (39)

I appreciate the answers guys. I guess I was thinking more as a safety net than to make more power.

How do you activate it? Is it manual or is there a control box or boost referenced valve that turns it on?

MIGHTYMOUSE

iTrader: (59)

all brands have their own fancy and not fancy ways to turn on the pump, none inherently evil either lol.

fwiw i have a high pressure pump and twin nozzles that are triggered by my boost controller via a relay. no fancy this or that. and it works beautifully.

the difference between 'safety net' and 'to make more power' is only the last step when you choose to turn up the boost or not.

98Camarod

iTrader: (43)

I was getting ready to ask a similar question as the op. When you are tuning, is there a setting that allows you to change the stoich since meth stoich is lower than gasoline? Also what is a general guide to follow as far as afr when injecting meth?

MIGHTYMOUSE

iTrader: (59)

you would only need to target a different stoich if you are using a different meter. for example .80 lambda is still .80 lambda, on a gasoline calibrated meter it just appears as 11.8:1

Avengeance

iTrader: (4)

Mine is triggered by a hobbs switch... once the switch sees 2psi the meth is activated. I ditched the cheap *** switch that came with my Snow kit and installed a real good heavy duty Honeywell brand switch. I just feel safer with a more solid unit vs the plastic one that came with the kit.

About watching the AFR.... you can get away with a higher AFR when the car is on meth. I recommend a nice digital unit... I use a Innovate gauge with a wideband.

98Camarod

iTrader: (43)

Double post FTL

98Camarod

iTrader: (43)

Alright, so what is the target afr for a typical boost application and then the meth afr?

calongo_SS

iTrader: (7)

Lot of differing opinions there. I am of the thought make it as rich as you can with out bogging. That will be as safe as you can get. My car is around 10.3:1 at 10 psi with a single nozzle AlkyControl kit. Some people try to lean it out b/c of the added octane of meth, but that just seems dumb to me.

Lawnboy

iTrader: (54)

11.0-11.5 AFR is a good start

98Camarod

iTrader: (43)

Big difference between 10.3 and 11.5....

Lawnboy

iTrader: (54)

yes there is , 10.3 is to rich, the GN cars run in the 10.0-10.5 range, but they are running 25-30 psi of boost.

A LS1 running 10-15 PSI is safe with a 11.5 AFR on methanol,
One of my friends is running a agressive tune at 17PSI and a 11.8 AFR
He is spraying the meth before the IAT sensor as a safty.
I know about LSX cars with boost pump gas and methanol injection, I sell methanol injection systems, and i have one on my car now for 3 years , running 11-12 psi on the stock motor , meth+pump (93 octang) 600 rwhp

dman

iTrader: (5)

just to clarify, if your running without detonation right now at a given boost adding meth won't show any appreciable gains. it's designed more to allow you to run aggressive timing and more boost. Thats where the power comes from. But if you just want a safety net them meth is your friend

MIGHTYMOUSE

iTrader: (59)

what are you talking about?


also fwiw i target about 10:5 over 20# boost

98Camarod

iTrader: (43)

I double posted so I edited it

What would you suggest for 10# of boost with a 50/50 of meth/water