Water injection with DASC

[DustenT]

I am going to purchase a water-injection kit for my DASC's ti. Anyone know if it's better to run the injector before or after the supercharger. I would like to run it into the elbow, as there is a hole there already. Any suggestions?

Chad, your friend is using a 1s system, correct? Are you using one?

[ZeroG]

Originally Posted by DustenT

I am going to purchase a water-injection kit for my DASC's ti. Anyone know if it's better to run the injector before or after the supercharger. I would like to run it into the elbow, as there is a hole there already. Any suggestions?

Chad, your friend is using a 1s system, correct? Are you using one?

Dustin,

Yeah, he first ran his in the elbow right after the MAF/AFM he now runs it in the DASC intake elbow.

Unless you are going to do a direct port set up where there is one jet for every intake runner you need to run the ject beofre the blower. If you run one only one jet after the blower then you will get more water to one cyl then another and the engine will now burn fuel evenly.

I am curently not running WI, but I began the install yesterday I have a 2d that I am going to hook up as a 1s for the time being. I still have not decided on where I would like to place the jet. What is the existing hole in the elbow that you plan on using? The jets are kind of wierd and have a interesting thread pitch so I don't think that any existing hole will fit it, but I could be wrong. Let me know your thoughts.

-Chad

[445DDG]

Hey man,
I looked at your web page and you should be very proud of the job you did to your 318, it is pristine. Do you think that an air flow meter for a 1.9L could replace a 1.8L's meter, that way I could have a much larger port for air to go in?

[DustenT]

Chad,
The hole I am referring to is in the DASC intake elbow, probably the same spot that your friend is using. It is on the back side of the elbow, at the sharpest part of the curve. I'm not sure what size the hole is, but I'm sure I can find an adapter for it. I am going to get a kit from www.coolingmist.com. He is currently selling kits on ebay for about $200. It looks like a pretty good setup.

What are you going to set your boost switch at? I am thinking I want to try mine at about 3~4 psi to start and see what it does. I remember talking to you about this before, you said your friend used a 1psi switch, is he still?

I think running the mist through the S/C is a good think. I think it should really help lower the overall temp of the S/C and the intake air temp.

[DustenT]

Originally Posted by 445DDG

Hey man,
I looked at your web page and you should be very proud of the job you did to your 318, it is pristine. Do you think that an air flow meter for a 1.9L could replace a 1.8L's meter, that way I could have a much larger port for air to go in?

Thanks,
I don't know about the MAFs. 1.8L are OBD-1, the 1.9L are OBD-2. They might not work the same with different computers. Somebody else would know better than I.

[ZeroG]

Dusten,

My friend removed his elbow and drilled a hole. The pressure switches that come with Aquatmist are adjustable, and yes he runs his at 1 PSI with a 6 Mil jet. I think I am going to start with an 8 mil jet at about 3-4 PSI like you mentioned.

If you find an adapter for the rear hole let me know!!!

-Chad

[m44ic]

Originally Posted by DustenT

Thanks,
I don't know about the MAFs. 1.8L are OBD-1, the 1.9L are OBD-2. They might not work the same with different computers. Somebody else would know better than I.

somebody was talking about a conversion piggyback kit lately in here, I think in the engine forum.

[DustenT]

Originally Posted by m44ic

somebody was talking about a conversion piggyback kit lately in here, I think in the engine forum.

Is it possible to completely eliminate the MAF sensor? If we could eliminate that sensor I think we could put real blow-off valves on our DASCs. That would be sooo sweet. I love that sound! Whoppppppshhhhhhhhhh! Any thoughts??? PS. I have OBD2.

[ZeroG]

Originally Posted by DustenT

Is it possible to completely eliminate the MAF sensor? If we could eliminate that sensor I think we could put real blow-off valves on our DASCs. That would be sooo sweet. I love that sound! Whoppppppshhhhhhhhhh! Any thoughts??? PS. I have OBD2.

The only way to elminate a MAF/AFM is to use a MAP sensor. It is a key tool in telling the engine how much fuel to inject. Very important for driveability. If you had a race car and were at WOT all the time you might be able to remove it all together. You would need Stand Alone ECU with programed maps so the car know what to inject and when.

-Chad

[sikbrik]

In reference to the "blow off valve" comment, superchargers are generally much more efficient with a bypass valve rather than a BOV. You'd be hard pressed to find a S/C setup with a BOV. I could be wrong but I haven't seen 'em. Good luck!

[DustenT]

Originally Posted by sikbrik

In reference to the "blow off valve" comment, superchargers are generally much more efficient with a bypass valve rather than a BOV. You'd be hard pressed to find a S/C setup with a BOV. I could be wrong but I haven't seen 'em. Good luck!

Jackson Racing supercharger kits use the exact same Eaton m62 supercharger as the DASC kits do and they have a BOV.

[sikbrik]

Straight from the Jackson Racing site:

"Because of our unique bypass valve design, engine life is not effected. Our system is so efficient and produces such useable torque, that you are rarely at full throttle for any length of time. When you are at cruise speed or idle, the bypass allows the engine to breathe normally, no boost. Only when you depress the throttle aggressively does the bypass close and you have an instant 6psi of boost. Consequently, with our unique bypass valve and reasonable boost, engine life is not effected."

While it sounds similar to the effects of a BOV, it's not really a true BOV.

[sikbrik]

I do stand partially corrected, however. I found a "racing" Bypass valve that does blow-off pressure instead of re-routing it. Not recommended for a kit using something the size of an M62, though.

"These type of by-pass valves are not needed or recommended for most low-boost standard street or street/race type aplications, because they are over-kill and might even cause the motor to produce less power due to blowing off a portion of the air that the supercharger is producing. In general, it is recommended to use a race by-pass valve on superchargers with more than 12 psi."