got a question about alky injection i know that it is a substitute for octane so if you are runnin pump gas and you want to run HOM alky is a good idea if you have the right recipe to keep yourself in HOM most people havent quite figuresd it out. personaly I run NOS additive with 3/4 tank of 93 and it works fine for me. But the question is around here I know a couple of "FORD" racers that build race motors some twin turbo that run water injection. This is what they told me about my satge 3r and alky injection so fill me in if you think they are wrong I mean they do drive "FORDS" they told me never and I mean never run alky injection when you are running high octane fuel and these are guys that are in there 50s and have been doing this along time so im sure that they know a thing or two and this turbo stuff is all new to me my SRT4 is my first turbo car. the thing I do not understand is why NOT they tried to explain it to me like it makes to high of an octane level or something but maybe yall can explain it better

 

Well, I've never heard "NOT" to run W/I with high octane fuel.

I personally have stage 3 with toys and a cooling mist w/i set up. I've been playing with different formula's to try and get HOM to hold. I've found if I run a bottle of NOS raceing formula, and my W/I (80%methanol to 20% distilled water), I can hold HOM all day on 91 octane gas.

If I run just the W/I and 91 octane, its a hit and miss, usually I get kicked out in 3rd gear around 5200 rpm, however when I get home from this deployment I'm changing some things with my w/i set up. I have heard of people running 93 octane and w/i and able to hold HOM. I just don't think 91 octane gas is going to cut it.

Now, based on the fact that methanol raises the octane of the fuel, I'm not sure how your ford guys figure not to use it. Now, I guess if your running supper high octane race fuel, example 110 or higher, I guess you really don't need w/i.

Another thing, is HOM will kick you out when it senses detonation, If I run HOM with out my w/i, I usually get kickeed out of HOM immediatly. So if W/I is preventing detonation, which allows more timing, and a safer running engine, how can this be bad????

 

I run NOS additive as well with half a tank of 92 octane and it stays in HOM for me as well that is not my question. My question is why am I being told not to use ALKY with high octane. as far as water injection with high octane fuel works great

 

i dont see how it would hurt but im not 100% sure.

 

it won't hurt, but it won't help. "alky" injection is a water/methanol (alcohol) mix which is what fstsrt4 was talking about. what w/i does is to prevent detonation and allow or more advanced timing on a lower octane. the reason why it's not a good idea to use meth injection and a high octane fuel is because it becomes difficult to burn. the higher the octane the harder it is for the engine to ignite and burn the fuel. if you've alreadt got methanol going in there and then you throw a high octane fuel on top of it the ingition won't be able to properly burn the fuel. that's not the end of the world, but it will slow you down.

the whole point of using w/i is to allow for lower octane, so you wouldn't be running a high octane fuel with it anyway. the most you should have to run with a water/meth set up is probably 100 octane to keep hom active. maybe 104, but that would be it. so you're not talking about really high octance fuels anyway. there's no need to be running 110+ if you've got w/i.