I have stock intercooler and pipes, I'm wondering if it would benefit my intake charge temps to run alky and not up the boost (I don't want to be alcohol dependant!). Basically I don't want to get alky and a tune, because I don't want to HAVE to have alcohol in order to drive my car to work =p

Could I get some decent gains by sticking with my 23psi of boost and spraying a little booze?

I read on cooling mist that they got 18hp from an SRT-4 by just bolting the system on, and they were only spraying water.

Anyone else done what I'm talking about? I realize that I could gain some SERIOUS horsepower by upping the boost, but I'd kinda like to play it safer. I'm thinking that maybe it will make my AFR too rich and that would be the issue.

If my AFR is richer then it is right now, then I will lose power is this correct?

Any help would be greatly appreciated.


(btw, I searched)

 

why is it that all the guys with yellow Evos try to run 23psi on pumpgas????

running an alky kit or meth kit is like running race gas.... it cools the charge temp preventing knock and enableing you to run more boost. with alky you can run 23-24psi on pumpgas. the way most of these kits work is that when your boost excedes 20 psi the alky kit is activated. you can set your boost controller at 20psi all week long and never use any alky. then crank it up to 23 on the weekend and gain power when you want to use it.

 

Adding alcohol injection to your car will make your A/F ratio much richer if you do not tune for it, in my case it was over a point more (from 11.1 to 10.0). There is really no way to do what you want. If you run alcohol injection and retune it you always need to have it on or you risk leaning your car way out. I typically run about 23-24psi on the street, at the track more like 26-28psi. Like the post above says if you are not running alot of boost the system won't even come on. But if you do not have some kind of fuel management system this will be hard to tune for.

Shad

 

UMM, not really, no. Most kits are dual stage kits, as in, they come on at a certain PSI then are at full blast at another set PSI. And race gas doesn't cool your intake charge, its the same temp as 93 octane.

You will see a gain out of spraying alky on your current tune, 1 because your intake temps will be dramatically reduced, and 2 because you are probably pulling some timing in this heat with your current tune spiking to 23psi.

BE CAREFUL THOUGH, alky is addicting, and knowing you can crank the boost and timing will get to you sooner or later, then you can never go back. Once you feel a good timing curve and 26psi you can never go back!

 

when i said like race gas i ment the ability to run more boost.

 

If you spray methanol without pulling fuel you will run very rich, and bog.

In your situation, it would be best to run water, like I am.

 

I agree and with other alcohols also. I also ran water with my set up and it ran the best when the A/F ratios were lean. The best advice is you have to get your water/alcohol set up tuned to your application. If 4TUN8's current A/F is about right or a little rich, he will see no gains or will actually lose power. Just wait and get tuned.

 

people run 27-29 psi on pump with alky and most cars begin spraying the alcohol at as low as 12-14 psi so they can run aggressive timing right off the bat. So at 20 psi he'd still be spraying and using alcohol and he'd still need it because of the aggressive timing

 

Yep you will loose power, Why? Because you are loosing some of your combustion area when using alky due to the vast amount of fluid going into the chambers without more air (richer AFR) so hp will go down without a tune. With a tune you can create more hp and make up for the loss due to all the benifits of advanced ign timing and more boost truly using the alky/meth.

 

Why not go with the the 50/50 mix and run it that way with a proper tune? If it is that big of a deal to keep the bottle filled then I would say just forget about it altogether. I am running 100% alky and only fill the bottle every 2 weeks, I check my oil more then I do the level of the alky.

 

My alky is set to spray at 12 lbs of boost. Mine is single stage -- you really dont need dual stage unless you are knocking really bad. Right now I'm just running windshield wiper fluid and I'm having fun with it. Tonight I will be tuning with it so I'll let you know how it goes

 

I appreciate all of the advice. So water injection would benefit me on my current tune?

I take it I can't just put alky in the tank, turn up the boost and watch the AFR's?

 

Go with the water/alky mix, but if you're not getting any detonation and not going to up the boost I don't really see the point since it will actually make you loose some power, but it will give you a larger saftey margin.

 

I tried that with my current setup, and even without the alcohol, the ECU just added more fuel as I ran more boost. So my AFRs stayed constant, then when I added alky, they went incredibly rich.

Now Im just running water until I can get a way to tune it in.