Can someone explain meth and does it affect reliability at all, I know basic concepts but is it intended for street cars? I plan on building a 10-15 psi dependable street/strip car wondering if I should include in the budget?

 

Yes you can run it on the street.

Meth/water works like a chemical intercooler. It sprays a fine mist of water/meth that cools down the combustion tempature allowing you to have more dentonation prevention. So it takes pump gas and gives it the same octane as racing fuel.

You could even hook it up to a Hobbs switch so once a boost level of say over 8psi is detected it would switch on the meth injection.

 

THIS ^^^^

and call the guys at alky control, they hooked up bad6as with his and that is one professional kit. they will explain anything you wanna know about meth. but what slaughter said pretty much sums it up. cools intake temps like an intercooler and gives a little extra kick of octane making it easier and safer to make big numbers on pump gas.

 

Would it have any effect on a NA motor?

 

It will not give the same octane as racing fuel.

Yes Methanol(M1) carries the same octane as 113-114 gas, but you would have to be using it as the primary fuel enrichment to see 114 octane.

If your using it with 93 and spraying the amount most people do, it might bump it to 97-98 octane.

When not spraying vast quantities of it, it's main benefit is intake air cooling which helps to stave off detonation also and will allow a slight amount more boost to be run.

 

also to add to this ive been told to run 100% meth ...no water mixed in with it

 

My opinion is that the higher the percentage of meth to water mix you use the more critical it becomes that you don't have any failures with the system. As it becomes a larger percentage of overall fuel enrichment vs intake air cooling.

 

Wow.. good to know I can make 901 RWHP through a powerglide on a 348 using 97-98 octane

Your off a little on the octane.. just a smidget

 

+1.. leave the water to the imports and the "slow"

This is my biggest beef.. alcohol injection is alcohol injection.

Water injection is just that.

Mix injection is just that. When you put water and alcohol together you have mix.

When you put water into whiskey.. its no longer whiskey. Quit calling it meth injection when it has water.

 

exactly! meth injection = no water

 

It will have to depend on how much you are spraying.

Your average M10 and M15 nozzle combo isn't going to bump the octane much over that.

Your the expert on methanol injection though, that's just my common sense theory that it would take a lot of methanol(like as much gasoline as we are using as the primary enrichment) to come close to getting the RON of 100% methanol.

 

Fbody Junkie i just noticed your from Greensboro NC, I am from Pittsboro Jordan Lake area.

 

Water also serves as a cooling agent, but no fuel source. Water also reduces the alky flashpoint.

 

GM(Buick) was playing with water injection in the 80's,and Meth...On the Grand National speedo cluster you can see a dummy light call "water INJ" you have to look closely since there is no light bulb behind it ...GN's have been using Alki for 15 or more yrs....the rest of the world caught on to our little secret,,now everyone is turboing everything and injecting Meth...cats out of the bag...

 

How are you calculating this? It would be nice to know how much meth injected on top a 91 octane pump gas would net you a certain overall octane level. Although at some point there has to be diminishing returns. I think in this case there would be such a thing as too much meth.

 

According to some meth injection manufactures they say that adding meth injection on top of pump gas can give you up to 25 more octane points, meaning that your overall octane would be around 116. That seems quite high to me considering that is the level of pure race gas.

 

Does spraying meth alone net a horsepower increase? Or, does all of the power gain come from the ability to run more boost/timing while spraying meth?

 

I'm actually in Mcleansville, but your just down the road! We should get up some time and shoot the ****.

It's very simple it's common sense.

There is no way in hell two itty bitty nozzles(in comparison to a 60lb, 83lb, 96lb, 120lb etc. injector) are spraying near enough methanol to bump the octane rating that high.

EVEN if 50% of your fueling came from Methanol it wouldn't take the octane much over 100.

114(octane of methanol)+93(octane of high test pump gas)/2=103.5octane

It's simple.

Julio (alkycontrol) said himself he targets 25% fueling from Methanol at WOT so if we calculate that 114x.25=28.5 93x.75=69.75 69.75+28.5=98.25octane

So there you have it.

SIMPLE mathematics prove's that right.

The main power in spraying methanol in small amounts like you do using a methanol injection system comes from IAT cooling. If you cool the IAT's off you can safely lean the fuel mixture out some, add boost, or a little of both. Depending on where you are with your timing when you add the methanol injection will determine if you can add anymore.

 

You might want to take a look at this:

http://www.powerblocktv.com/player/s..._num=HP2011-17

 

Im amazed people are replacing 25% of fuel with meth injection, that seems pretty scary.

I have used meth for cooling esp in summer days.