I had a chance to look in the engine compartment for a bit yesterday and I think the area where the wiper motors are might work well. There is a pass through on the passenger side that goes from the engine bay to the wiper area. This would be perfect place to feed the meth line in. I have to look a little more to see if there is a pass through to let the line out on the other side.

I like this place as it is totally out of the way from the heat of the engine compartment. The only question is does it have any moving air and is it out of direct rainfall?

I will explore this option more soon, I think it might be a promising location.

 

keep me posted dudical.
i took pictures of 'heat shield' and still need to figure out how to post in this forum.

 

Here's what I'm planning to do (see attached picture). I've relocated the HSV and flow sensor on a bracket that mounts up right behind the driver's side headlight. It should see air that is about the same temperature as what the mass air flow sensor attached to the cone filter sees, which is generally in a safe range for the HSV (ambient temp when the car is moving and under 150F when the car is stopped).

The HSV should see plenty of airflow from the factory air scoop ordinarily, which is pointing right in the direction of the components. I think there may be a bit of moisture that gets in this area when it's raining, but the bracket itself will block moisture that would otherwise go directly from the opening above the headlight, and the moisture that might come in through the hood vent when the car isn't moving isn't going to fall that far forward under the hood.

I haven't finalized this and I would VERY much appreciate ANY quick feedback at all before I go ahead and do the rest of the re-install. I've spent a lot of time pondering this and this is the best I could come up with for balancing ease of access to the components (to do maintenance and ensure that there aren't any hidden leaks), good air flow, and proximity to the upper IC pipe.

Thanks!

 

I think this is a good place for the HSV and flow sensor.

 

how about distance from flow sensor to the jet? hope not too far...

 

It's less than 2 feet away. It would be easy to move it closer to the nozzles, but that would have to be in a significantly hotter area of the engine compartment.

 

I don't think it matters because the hose will still be filled with water after injection.

 

Thanks for the quick response, Richard. I finished up my re-install under the hood. Now I need to move on to the trunk to redo my tank set-up.

 

pics of home made/custom made heat shield.
thanks to zzombae for time and plan.





let me know what you guys think.
will this be good enough?

 

I moved mine because I didn't think a shield would suffice, but I may be overly conservative. Ultimately, the temp of the components behind the shield is going to be the same as the temp of the surrounding area. The question is whether the problematic heat comes in occasional blasts to the firewall or whether there is a constant convection oven effect that brings the rear engine compartment as a whole to too high of a temp.

 

Without a temperature probe, it is difficult to be certain if the heat shield is effective.

How difficult is it to access the wiper motor area? It is a pain for access for the future also. I think the front or side of the engine bay may be a better bet.

 

Richard, I removed the plastic cover over the wiper area. There is some room in there but not a ton. Also I am not sure if the movement of the arms and the motor would influence the flow sensor readings. Finally I also don't know if it would get wet.

I have taken as many pictures as I can from all different angles to show you and see what you think would be the best place to mount the sensor and HSV.

Here is a directory with all the pictures.
http://www.skidmore.edu/~a_blaker/Car/Wiper%20Cowel/

 

As long as the flow sensor is 6 inch away form the motro, it wil not be affetced.

I looked throught all the pictures. you can almost fit the entire water injection system in there.

It is a good find. Thanks for taking all those pictures.

If the HSV is going to be mounted there, make sure it has rubber bushes on the sub-bracket.

 

Why rubber bushings?
Do you think there is enough moving air?
What about water?

 

The HSV makes a very similar noise to engine knock when activated, especially onto a panel surface. rubber mount will dampen the sound level.

If there are no damaging heat there, cooling by convection is adequate.

I think putting the HSV and flow sensor into a plastic tube will prevent direct water splash. Road salt on winter roads is most unpleasant for any metal components.