Meth Injection
Thread Starter
Intermediate
Joined: Jan 2012
Posts: 33
Likes: 0
Meth Injection
Hi,
I was told today by a tuner that you cannot NOT tune for meth. He said it was a power adder and not a safety, if you run out of meth your engine is done for. I thought I had read you could run meth for safety and keeping IAT down, therefore not pulling timing? Maybe I'm just reading the methanol injection posts incorrectly?
Thanks for any insight!
I was told today by a tuner that you cannot NOT tune for meth. He said it was a power adder and not a safety, if you run out of meth your engine is done for. I thought I had read you could run meth for safety and keeping IAT down, therefore not pulling timing? Maybe I'm just reading the methanol injection posts incorrectly?
Thanks for any insight!
Le Mans Master
Joined: Jun 2004
Posts: 6,164
Likes: 103
Hi,
I was told today by a tuner that you cannot NOT tune for meth. He said it was a power adder and not a safety, if you run out of meth your engine is done for. I thought I had read you could run meth for safety and keeping IAT down, therefore not pulling timing? Maybe I'm just reading the methanol injection posts incorrectly?
Thanks for any insight!
I was told today by a tuner that you cannot NOT tune for meth. He said it was a power adder and not a safety, if you run out of meth your engine is done for. I thought I had read you could run meth for safety and keeping IAT down, therefore not pulling timing? Maybe I'm just reading the methanol injection posts incorrectly?
Thanks for any insight!
Thread Starter
Intermediate
Joined: Jan 2012
Posts: 33
Likes: 0
yes you can tune for meth, you want your IAT sensor after the meth nozzle, that way you can tune it to pull timing if the IAT'S start to get high, or you can just use it for safety, but there is always a chance of pump failure, tank empty, or an electrical problem, not that bad things can always go wrong but it's possible, you may want to find a tuner who is more familiar with meth.
Safety Car
Joined: Aug 2006
Posts: 4,347
Likes: 25
From: Apache Junction AZ
Here is a thread you should read. http://forums.corvetteforum.com/c6-t...lications.html
It is about using meth with a non boosted engine. You can also use meth with your boosted application in several ways. Firstly, you can tune your boosted engine without meth and then add then meth to cool the intake temperatures. That is the safe way.
The other way is to tune your engine with meth and use the IAT sensor to pull timing if you lost the meth. This is the way my car was tuned in '07. I have never been comfortable with that prospect because as your tuner says, if you loose the meth you will probably loose the engine because the IAT won't pull enough timing fast enough to save the engine. That is why I am adding a second safety backup which will monitor the meth flow and drop the engine out of boost the instant that the meth flow is outside of the normal parameters. (See the attached pdf)
It is about using meth with a non boosted engine. You can also use meth with your boosted application in several ways. Firstly, you can tune your boosted engine without meth and then add then meth to cool the intake temperatures. That is the safe way.
The other way is to tune your engine with meth and use the IAT sensor to pull timing if you lost the meth. This is the way my car was tuned in '07. I have never been comfortable with that prospect because as your tuner says, if you loose the meth you will probably loose the engine because the IAT won't pull enough timing fast enough to save the engine. That is why I am adding a second safety backup which will monitor the meth flow and drop the engine out of boost the instant that the meth flow is outside of the normal parameters. (See the attached pdf)
Last edited by 07MontRedcp; Jul 14, 2012 at 12:56 AM.
Le Mans Master
Joined: Jun 2004
Posts: 6,164
Likes: 103
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Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
There are different ways to setup a tune for meth. The best way in my opinion is to dial in a safe AFR without the meth running, then have it go rich with the meth flowing. All my cars with meth have been no leaner than 11:1 with the meth active. If the meth were to fail, it would still be in a reasonably safe zone.
Also, you should set up the IAT spark table to add any extra timing you want when the temps drop from the meth, and take it away if they go up. You don't have to do that, but it's a great way to make extra power and protect the engine.
But to answer the original question: no, you don't NEED to tune for meth. It will probably not be ideal, and overly-rich, though.
Le Mans Master
Joined: Jul 2010
Posts: 6,013
Likes: 726
Hi,
I was told today by a tuner that you cannot NOT tune for meth. He said it was a power adder and not a safety, if you run out of meth your engine is done for. I thought I had read you could run meth for safety and keeping IAT down, therefore not pulling timing? Maybe I'm just reading the methanol injection posts incorrectly?
Thanks for any insight!
I was told today by a tuner that you cannot NOT tune for meth. He said it was a power adder and not a safety, if you run out of meth your engine is done for. I thought I had read you could run meth for safety and keeping IAT down, therefore not pulling timing? Maybe I'm just reading the methanol injection posts incorrectly?
Thanks for any insight!
Burning Brakes
Joined: Aug 2012
Posts: 811
Likes: 18
From: STL
I ran meth for over a year on my 10 second G8 i absolutely loved it.
Little boost of octane of course, cooler IATs, and a little more timing(only added timing depending on certain IAT temps) that way if the meth didn't work or failed the extra timing would not be added.
Alky Control i had was also top notch!
Little boost of octane of course, cooler IATs, and a little more timing(only added timing depending on certain IAT temps) that way if the meth didn't work or failed the extra timing would not be added.
Alky Control i had was also top notch!
I think i know who you are referring to.... 
Safety Car
Joined: May 2006
Posts: 4,016
Likes: 93
From: St. Louis, MO
Tech Contributor
I've ran my meth tank completely dry. When moving over 100 lb/min of airflow, things can go wrong really fast. Even when the tank is dry, my engine still hasn't popped. There are different ways to tune and compensate for the meth. It is entirely possible to tune a car to work if the meth fails while still having a benefit from it spraying. I wouldn't call meth a power adder... just a power enabler.