Ok, I've decided to do some work to my car. I'm still doing a lot of research before making a final decision on what to do. I'm still deciding if I want to go FI or NA. But in either respect every thread I've found dealing with upgrades seems to have problems stemming from the lucky #4. I think that a water injection unit would help prevent the problems in #4. And the rest of the engine.

Tell me if I'm wrong here, but even a NA aplication would benifit by being able to deal with lean conditions in #4. And as for FI, it would help deal with detionation, and carbon build, correct? We could advance the timing more with either EMS, or greddy system. Also by preventing knock the engine will not retard itself. Also another benifit, add alcohol to the water mixture for a later burn producing more power later in the stroke. By eliminating the carbon build we would also get rid of hot spots.

Or is there something I'm missing? I have not found much on water injection on this board, so forgive me if I missed it in the search.

Also, If I decide to stay NA, I would want a carbon fiber hood with a cold air inlet for a ram air effect to line up with the stock air box. Does anyone know of a company which makes one? I have not found this in the search either.

Thank you and feel free to PM me with info
scott

 

Am I reading this right: You want to inject water into the engine? Water can't be compressed like air/fuel can.

Thats why we have the term "hydrolock"

Unless I'm not reading this properly.

 

koala: Water injection systems are used to cool the intake charge. While it's true that water isn't nearly as compressible as air, in small amounts it's OK...in fact, it's no different than rain water spraying into your filter.


spa: The #4 cylinder issues were due to inadequate oiling, not lean conditions, so water injection won't solve the issue.

 

You are reading the correctly. Yes I want to inject water directly into the intake. Hydrolock occurs when there is so much water inected into the intake and the cylinder cannot be compressed to the point where it would allow the water out on the exhaust side. A small amount of water in a mist is not going to cause hydrolock. I'm not talking about 3 oz per stroke!

 

Don't bother with water injection. Even if you got to the point where you could manage the individual cylinder distribution to help out #4 (if that was the problem), you'd lose power without the ability to advance ignition timing.

In the end, you'd be better off spending the money on an engine management system capable of doing individual cylinder tuning, cause it would probably be cheaper and more effective.

I've played around with water injection a great deal. It has usefulness on forced induction, but on NA motors there really is no point.

UL

 

[QUOTE]Originally posted by ultimate lurker
[B]Don't bother with water injection.

 

fp, Read UL's post again...he agrees with you that injection is useful for FI apps.

 

Too many beers tonight

 

Water injection is actually a great tool that really isn't used very often. But, it is use widely in rally racing and endurance(24hour ar LeMans) type racing. Water injection is very good for FI if you aren't retarding the timing, but for NA, you would have to have like 15:1 compression to actually need it. I have to agree that on NA, it may help a little, but not enough to use it.

 

how about the hood?