308 Turbo Mod

The benefits of Water Injection are substantial and well documented. A lot of people hear about the idea of injecting water into the air that enters the engine and wonder if putting water into the engine isn't a bad thing.

The truth of the matter is that it's a very good thing if done properly. Only a small amount of water is injected as a fine mist. This mist is evaporated quickly in the hot intake air. As the water evaporates, it cools the intake charge significantly.

Cooler intake temperatures make the engine less likely to knock. This allows the ECU to fully advance timing and extract more power. This strong cooling effect also makes the air more dense so the air mass in the cylinder can increase, which allows the fuel delivery amount to increase, which increases the power released for each turn of the engine.

It's often said that water injection will allow your car on a hot day to run as well as it does on a very cold day. For turbocharged cars, this also means that the engine can be run at a higher level of boost for a given grade of gas and ambient temperature.

 

I adapted my system into a Nissan that was running 16lbs boost thru a roots blower.
Under full noise the intake temp was 108 degress CELCIUS I played with nozzles sizes from 1to 1.5 and finally a No 2 and bought the intake temp down to 46 degrees an astounding 62 degrees difference.
I also recently built a Hyundai concept vehicle in conjunction with Hyundai Oz for the motorshow circuit, I put an Eaton unit on it and ran 18 lbs which took the V6 from 160 KW to around 300KW and used water in two stages a 1 nozzle cutting in at 2800 RPM and a 1.5 at 4000 RPM using hobb switches I adjusted at the bench for 4-5lbs and then at 10lbs boost the intake differences were again as great.
I then ran pure alcohol thru the system and it cooled it even more whilst fattening it up in the big HP ranges. Causing me to drop the secondary nozzle to a 1 as it "put out the flame" due to too much alcohol.

These systems are relatively easy to put into your cars and the componets are easy to find.

Start with a Flojet pump hobbs switch gas cut off valve and you are nearly there.

I am watching the blower install threads with baited breath as i will be in there like a rat up a drain pipe and will use injection on my Mondial when they are released.

 

A 3-4 litre resovior with a 1.5 nozzle delivers a whole heap of in boost time I gotta tellya. Installation of a low level indicator at a half or litre gives plenty of warning so no excuses. My warning device cost me 10 bucks and was a simple install.

 

the temps i've measured with the infared gun, range from about 165~180 on the supercharger itself. the manifold on the engine is usually about 195~205. and the spark plug wells read about the same. so even compressing 10psi the charger is still cooler than the engine getting the manifold. not that doesn't mean it wouldn't benifit from an intercooler, i'd love to squeeze one in. but man is space tight. and with 400+hp already and trouble using it, why go to the trouble?

my thought was also to use the water injection and port it where the EGR was, great nozzle location to. but more money and it's still not a 100% fix. now ditching the aluminum intake for composit and running a built in water/air intercooler is on the option list. i'll be working thru designs soon.

 

When running boost as well as water or alcohol injection it is a great idea to run pneumonic gasket material between your intake and head surface to stop heat radiation which in itself will reduce intake temps by around 20-30 degrees celcius

 

Do you mean "phenolic"? .... if its pneumonic you should see a doctor

 

Yeah you got me there ...I tried to go in and edit the post but for some reason it wouldnt let me.

 

The bottom line.

As I am interested in more power (as are lots of people on this forum), hypothetically, if you decided to sell kits, what would you charge for the bolt on package?

More power would give street credibility to my Monzer projects.

 

?

 

MODERATOR NOTE: I consider this more "new development" stuff, not a commercial enterprise, even if it means you're helping some other FChatters do what you've done to your car, that's OK! So carry on... at least until it starts looking like a business.

We're glad to see this kind of innovation -- it benefits all of us in the 308 community!

 

Hi Steve, its a very nice system so far.

I would put in my 2 cents having worked with some racing turbo vehicles :

Heat shield and wrap that turbo and the exhaust. The 308 engine bay is poorly ventilated and the turbo can cook the diff and other bits in short order.

If you have not already, develop some type of support brackets for the turbo other than the manifold. The manifold will fatigue and crack with use and also having to support the turbo and all associated vibrations.

Probably you have already thought of this and may be on it already.

Keep up the good work.

Cheers

Eric

 

I've had some limited experience with turbos where did you add the turbo in the exhaust line and what parts did you have to modify to complete the install

 

Nice video, sounds great.

I noticed you have a G-tec in one of your pictures. Have you done any 0-60 times or any other data collection?

 

Just wondering if you have looked at the Subaru IC cores, they aren't the largest IC's and do mount horizontal from the factory.

I know the engine bay is very tight, but maybe a smaller IC with a mister would be enough to help a bit.

 

So how is this going? Any news?

 

Yeah, what happened to this project?