KPV

This is very interesting. I remember hearing about WI many years ago. It has been around for a very long time.

Stephen,
Correct me if I am wrong, but, besides the WI acting as a gaseous intercooler, isn't the benefit of the cooler A/F/W mix the fact that it is more dense (because of its cooler temp)? More dense means more mass into the cylinders with each intake stroke and hence more material to burn with each spark plug firing resulting in greater downward force on the piston meaning more hp? Sorry about that run-on sentence
So, as I understand it, if I incorporate WI into my plans (combined with EP Stage 2+GIAC+K24's) I should be able to run a program that is normally setup for 100+ octane if I run 94 octane pump gas (Sunoco 94) exclusively? I can always find 94 octane where I am. This would eliminate the need to find Cam2 or equivalent race fuel to run the higher hp program?
Regards,
Ken

johnfm

Ken

I believe that the benefit to charge density of the WI system isn't that great - the main benefit, as I understand it, is preventing pre-detonation so you can run higher boost.

PorschePhD

Ken,
You are correct about the density of the charge. Although there are a dozen reasons to run water injection.

You are also correct that the reason we are moving on this is the exact reason you outlined. Water is cheap and the results are proven. You will have the ability to run either more boost or a more aggressive setting. The thing that should be known is if the car is strung to the gill, the system will not provide you any more HP/TQ, rather lower your AFR and allow you to run that level on less octane with a better or safer AFR. Cars that are near stock and not being pushed will tend to see gains. For our Stage IV I do not anticipate a big gain if any, I do believe that I can run the stage IVR 100 octane on 93 which is what I am trying to prove. The other factor is I am running dynos on a stock program in my car to see what the benefits are for the average user. This is where I expect to see gains, especially in the summer. <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />

KPV

Stephen,
Your truthfulness in testing and dissemination of the facts always impresses me! Keep up the good work! The WI system intrigues me very much. I hope to see good results and would consider integrating it into my plans. Please take a look at my "Forced Induction" idea post of earlier today. I would very much appreciate your thoughts.
Regards,
Ken

HBdirtbag

I don't know where i've been but i've never really took this concept seriously. I didn't know the details of it really though, I just overlooked it. My crx might really like this. But the kit is rather costly, any ideas on something cheaper. What does your kit include?

PorschePhD

A little update for you guys. I spent some very good time today running test back and forth and really trying to get this dialed in. The car without a doubt is picking up TQ in stock mode. I have some dyno time confirmed next week to confirm actual numbers. Something for the street and real time though....The pipe into the throttle body (the Y pipe) was no less than 20 degrees cooler after running than the outer edges of the pipe. So basically where the intercooler lines snap into the y pipe to the other end after the injectors show serious cooling. This is just the metal pipe. Imagine what it is doing in the motor. The pipe after the injectors was actually cool to the touch after some pretty boosted drives. The car now in stock mode feels like our stage II/III kit. I will keep you all posted as things progress.

KPV

Stephen,
It sounds like you are really on to something here. Do you envision there are any detrimental effects either short or long term? Under a given intake pressure, you are adding water mist/vapor into the A/F mix. That takes up volume. So, where does the extra volume come from? Unless I am misunderstanding it, it would seem one of two things would have to happen:
You either have to reduce the air volume, fuel volume or both to allow for the water volume OR
there is some other means of pressurizing the intake mix to add in the water. So, which is it?

HBdirtbag

Sounds awesome. Have a few questions. It's a constant thing right? It's not setup like a nitrous system where it's armed manually.? Also, how big a tank do you have for the water? How long can you run w/o having to refill it? Is it basically a mini fuel cell?

Zippy

KPV - In the research I've done & implemented on one of my vehicles, you are correct in suggesting that the limited "space" is partially filled with water vapour. But... because the intake charge is up to 100' cooler and therefore much denser, my understanding is that you are actually flowing significantly more mass through the intake than just that added by the water vapour.

Mike

930waterboy

All,

I spent over the last year developing the kit for Porsches. If you go to my website (www.heibar.com), you will find information on the kits and the application/use of water injection. The information on the website designed for the DIY mechanic down as far in the technical weeds as you may want to go. If you have any questions, please do not hesitate to contact me (askheibar@heibar.com) or Stephen.

Thanks,

Brian Raine
HeiBAR

930waterboy

Hey Chad,

Good to hear from you.

As you maybe aware, the February winter weather in DC put us a few weeks behind schedule thus our placement of the advert in Pano turned out to be a little premature.

I kept Stephen updated on our progress for the year+ it took to pull the kit together. The only real concern for the 996TT was placement of the injectors into the Y pipe. You want to keep the injectors at least 3" from the throttle body which posed a challenge given the stock sensor placement.

Stephen kindly volunteered to work the Y pipe placement (in addition to shooting the 996TT install photos). As of yesterday, Stephen had the system fully installed. I believe he is shooting for early next week for his dyno run.

I sent you/Rob King the gauge directly as your were planning gauge layout in your car. It was my understanding that given your initial contact with Stephen, you were going to source your kit through Stephen but preferred to wait until Stephen had completed his installation. ImagineAuto received your kit about three weeks ago.

I can't wait to see Stephen's dyno results and pictures of the kit installed in your 996TT! Hot summer weather is just around the corner!

Thanks,

Brian

PorschePhD

Chad,
I have your kit and your injectors as we discussed. I was under the impression that you didn't want anything until we had dyno proof the kit works. I have had the kit for almost 4 weeks. The mounts, well you will have to create. This is one of the issues I have dealt with on mine and why we are doing the y pipes and install procedure for Heibar. Let me know what to do...