Hey fellas-

I got an 06 sti. Right now i have cobb accessport, cobb turbo back, cobb light weight pulley. I want to get a little more power without doing the turbo and all that fun stuff right now, i dont got the money. ive been reading a little bit about this alcohol injection from SMC is this a good kit? Would i need any other mods for it, i dont wanna ruin my engine so i wanna make sure. thanks

-Josh

 

I would say to do a fuel pump and then run it. Personally we usually use Aquamist systems but have used SMC's in the past. I would say to get one that has solid fail safes as this is probably the most important reason to get a good W/I system.


Good Luck,

Mitch Mckee

 

what do u recommend? A walbro or any other ideas and what size

 

Just a Walbro 255 will be fine.

Mitch

 

are these a bear to install or pretty simple

 

Fuel Pump is really easy.

W/I is time consumng but by no means hard. If you are not mechanically inclined I would leave it to a shop to do.

Mitch

 

So would only a Fuel pump be required for Meth/Water kit?

Why would a Fuel pump even be required? If you don't upgrade the injectors whats the point of hte Fuel pump. I know it is not a bad upgrade but is it benefical? Would the extra fuel not come from the Meth/Water Kit?

Would the most important thing be to improve the air flow into the cylinders i.e. upgrade turbo (more air flow, or up boost?

I am in the same boat deciding on just to install a Meth kit on a stock turbo etc..

I think I might just hold out and upgrade the turbo first then the Meth afterwards unless I see any super benefit of not upgrading hte turbo first.

Best of luck though whatever you choose, let me know

 

I was debating the same thing now. Maybe just hold off until i can upgrade the turbo then the meth

 

Make sure you understand the purpose of it and why you are doing it. You are trying to cool the intake charge, not provide alcohol for the motor to burn. If you haven't improved flow through the turbo substantially, you're not going to see much of a benefit. Switching to a bigger, better intercooler (TMIC or FMIC) also cools the intake charge, and is much more reliable -- it never fails to work.

Water or meth/water injection does not provide power, it provides cooling and increases intake charge density; it is an equivalent effect to using higher octane (less likely to burn) fuel. To see the benefit of the power, you have to turn up the boost quite a bit, most likely to a level which would be dangerous or fatal to the motor if the meth system failed to work. Imagine running 91 fuel in a car with a 100-octane tune; that's what happens when your meth tank runs dry, or the injector fouls, or the motor seizes or several other possible fail points.

It is just a personal opinion, but meth kids to me seem like a last mod, not a first one; AFTER you've got a built motor, a bigger turbo, a FMIC and all the supporting mods, THEN you use a meth kit to tweak that last 30hp out of the setup. I've certainly seen some huge numbers with them, just as I've seen big numbers from NOS kits, but those setups also had monster turbos and tons of support mods and the car owners were comfortable with the idea of the whole thing grenading just to get that last 10% of power.

 

^^ Nice point ^^ Think I will wait for the last mod.

What you could do instead of Meth/Water is just get a race gas map and be done as a first small step if you really want a little HP for cheap i.e. No real upgrades, again the turbo I feel is the weakest link in the STi.

 

thanx alot meth injenction is out. time to start saving money

 

Open the airways all the way up. If you haven't gotten a header yet think about that. I know on stock turbo once I had completely opened mine up if felt like a nasty V8. My friend had a 2003 Cobra with exhaust and a different pulley and he even admitted my car felt like it had more torque then his (doubtful though, they're monsters).

Think fuel system and airways right now, or even drivetrain (i.e. clutch). The more of that stuff you get the closer you'll be to being able to think "turbo upgrade" and reaching into some real power.

Also, there are some extremely cost effective ways of making an STi handle even better for nothing. Think thicker rear sway bars, strut tower bars and bushings. You could go with almost all that stuff for around $1000, about what a water injection kit will cost.

 

on stage 2 sti's with our coolingmist kits we are seeing 340ish whp but 385wtq...approaching 400wtq not bad!