I know a little bit about meth injection and i know that it can be used to cool the air but also be used to increase the octane. ive heard horror storys about how corrosive it is and how it eats through the best pumps within a year or 2.

Now i have heard that alcohol just cool the incoming air but it does not increase octane or act like a secondary fuel system. its not corrosive because i use it in my grill and spill it everywhere.


what kind of difference is there performance wise?

any other pros/cons that i didnt list?

 

Denatured alcohol (more or less E98) from the hardware store is really close to Meth. I made 527whp on a customer car recently running it. The only downside I can see is it is more a gallon than meth, but other than that there are only the Pros you would expect...no corrosion, longer pump life, octane increase, extended fuel system, etc.

 

I really haven’t seen a downside to W/I & yes both will increase octane. Running 100% meth is hard on pumps, although some manufacturers do have pumps capable of handling it, they generally don't advise it to lengthen pump life. To reap the biggest benefit there should be some water in there somewhere, which will also knock down the corrosiveness of meth.

FWIW, I believe the mixture you run should be dictated by the climate you live in. Here in Utah we have very hot dry air in the summer with average humidity around 20%...very different from Florida. I have played with different mixtures starting at 100% meth to 50/50 then 60/40 & 40/60. Of those, 60%h20/40% meth gave me the coolest charge temps at that time. Since then I have upgraded from a pps to a pwm-v system with pre & post turbo jets & started testing again but ran out of 100* days so I have to wait to finish.

If you really want to jump down the rabbit hole, here’s a link with some of the more relevant NACA papers from WWII
http://www.not2fast.com/NACA/

 

i've reade somewhere on another forum about this, do you add a gallon of denaturated alcochol to the gas tank on every fill up or do you use water meth injection system to inject the denaturated alcochol?
I've seen people on 350z forums run 30psi of boost on 93 octance plus 2 gallons of denaturated alcochol on every fill up

 

is it better to run straight denatured alcohol or a 50/50 mix with water?

 

yes i saw that thread in the dyno section. that is pretty much what inspired me to research alcohol injection. there isnt any e85 close to me and i live in an apartment complex so storing it is pretty much impossible.

ive made up my mind im gonna jump on board. do you suggest that i tap all 4 intake ports and run it like a direct port setup, or will a single nozzle work good enough?

thanks for your response

 

I run 100% denatured alcohol/93 oct @ 30 #'s of boost with a injection system, it has a 1 gallon tank. It lasts me for months at times, it all depends on how hard you drive. Know if I was to beat the **** out of my car I would say that it would last one tank full.

 

It does increase octane and it does act like a secondary fuel source!

 

better is to run 50/50 mix but with demineralized water. alcohol must be less than 50%.

 

Only if you dont like making max power.

 

Regarding methanol, please do not forget that it's highly toxic. Don't inhale the fumes (it evaporates quite easily and doesn't have any detectable smell) or have the meth come into contact with your skin.