mgt_9688

Was curious about the benefits of Meth Injection on boosted applications. Would there be again of adding meth injection to a boosted car without tuning? That is leaving boost and timing unchanged. On N/A cars you usually gain some power by adding a cold air intake. So would this be similar on a boosted engine? I know tuning for it would yield very good gains. But i'm curious of what would happened if added without modifying the tune.

HCI2000SS

iTrader: (2)

I might be wrong but I've heard it will become super rich without any tuning. If that's true you'll lose power I'm sure

JoeNova

Whether or not it becomes rich depends on the mixture of methanol and water that you use.

There are a ton of benefits to running it even without a tune. I had a bad episode with a boost controller and wastegate in the past week. Set the controller for 10 lbs, ran 20 lbs of boost on pump gas on 3 separate pulls. The last pull, I hit 27 lbs before I let off. If it wasn't for the water/meth, I would be out looking for a new engine.

mgt_9688

What if its used with water only. Just to keep lower intake temps? Would the a/f ratio be the same as without it?

JoeNova

Intake temps matter very little in the long run. Removing heat from the combustion chamber is what prevents detonation.

mgt_9688

So water alone will not remove heat from the combustion chambe or gain any hp?

JoeNova

Water alone will remove much more heat than methanol, but it doesn't burn so its not likely you'll see noticeable gains. It will greatly reduce chance of detonation, and do a great job of cleaning your plugs, pistons, and valves.

Regular blue -20* windshield washer fluid is like 68% water 32% methanol and you can get it less than $2/gallon. Not much reason not to run that.

The Alchemist

iTrader: (19)

Injecting water has a lot of benefits, and yes, you will see some hp gain even if you don't tune for it. It will keep the piston crowns and combustion chamber 'cooler' than not using it, also as the liquid water turns to steam, it cools, but also increases cylinder pressure, which is torque.

stevieturbo

It might be more useful to explain what you are working with, and what you are trying to achieve.

Many cases you could see losses, on the other hand in other cases you may be able to release some gains. But it always depends what you're working with in the first place.

willizm

iTrader: (10)

Not only that but if he is using the tables that pull timing based on IAT then he's going to notice those gains more readily. I had to relax my table since i'm on e85 my IAT's don't matter as much as say a 93oct car.

yenkomike

iTrader: (2)

ran my car on 93 no meth 11.4 afr ran 10.54 at 130 10 # boost 11* timing left it alone and added meth (-20 washer fluid) ran 10.50 at 130 same tune afr now 10.7.

the weather was very close to the same da. all seemed the same.

mgt_9688

What I was thinking of doing is adding some meth injection or just water alone to lower my chances of detonation. Im running 8# of boost on a procharger with 12* timing. What would be the best way to run this without tune just as a combustion chamber cooler mainly. What I have been seeing is that most people use it to boost octane so they can increase timing.

stevieturbo

Bottom line, just run very small quantities of whatever you are injecting. A small amount of 5050 would work just fine.

Dont get caught up with big jets etc

The Alchemist

iTrader: (19)

I agree 100%. At 8psi of boost, and 12 degrees of timing, you are pretty safe, especially since it's a centri-blower, so you're not seeing that 8psi till after peak torque, which helps as well.

A small nozzle, for whatever system you chose, is going to be sufficient and you'll be fine.