Vented Hood......yes another one

[Otamiway]

My experience is that nothing sticks to that fiberglass schtuff...

Thanks.. I am still working on a solution

 

[wagonteeth]

what about sealing the edges with an epoxy? You could tape it off to get clean lines and pull the tape after applying and before it starts to harden/set up.

 

[boydmick]

I'm curious if you have noticed an increase in the cabin air temp. It seems to me that all the heat is dumping right into the outside air intake. I know on my truck the air from the vents is already warmer than the outside air and I think this would cause a significant increase.

What about engine smells entering the cab; notice any difference with that?

 

[Otamiway]

what about sealing the edges with an epoxy? You could tape it off to get clean lines and pull the tape after applying and before it starts to harden/set up.

Thanks for this epoxy idea...

 

[Otamiway]

I'm curious if you have noticed an increase in the cabin air temp. It seems to me that all the heat is dumping right into the outside air intake. I know on my truck the air from the vents is already warmer than the outside air and I think this would cause a significant increase.

What about engine smells entering the cab; notice any difference with that?

No unpleasant smells in open vent mode (fresh air not recirculating air). I was a little paranoid about that too. I have not noticed any difference in cabin temp.

I was pleasantly surprised how much hot air flows through even with the motor off.

Thats my "seat of the pants meter" saying my install works

 

[dontblink]

I'm curious if you have noticed an increase in the cabin air temp. It seems to me that all the heat is dumping right into the outside air intake. I know on my truck the air from the vents is already warmer than the outside air and I think this would cause a significant increase.

What about engine smells entering the cab; notice any difference with that?

That was a big consideration for me as well, so I went this route:

 

[Otamiway]

Dontblink,

Nice install. I read your thread nice write up.

I too was concern about that from previous thread I read. I wanted the largest holes with minimal structure impact. I recall CDan commenting on degrading the hood performance in an impact in one of the threads.

 

[Smokinrodder]

Very nice! That scoop looks like it belongs there! I think I have found an add on for my to do list.

Sent from my DROID X2 using IH8MUD

 

[Otamiway]

Very nice! That scoop looks like it belongs there! I think I have found an add on for my to do list.

Sent from my DROID X2 using IH8MUD

Thanks.... The scoop is from a 2002 - 2003 Subaru WRX off ebay. I ordered the Mesh Grille from CARID

http://www.carid.com/2002-subaru-impreza-grill/grillcraft-mx-grille-353977.html

Well worth the effort...

 

[1FZj80]

I have been thinking about something similar but wonder how much air flow you actually get when driving. What is the open vent area? Obviously, when stopped with a hot motor, you will feel the heat. But, when driving, the bottom of the windshield is a high pressure zone and positioning the vent in this location might limit flow. Looks good though...

 

[Otamiway]

What is the open vent area?

Open vent... I added more info above. I meant fresh air vs. recirculation mode

When I have the motor running I can feel good air flow out the vent..

 

[thirdmatt01]

I am buying the same scoop. Do you know what year Subaru it came off? Also did you use the Subaru deflector, or do you just drill the holes and bolt it through the hood? Can you post pics of the underside how its bolted. When you say shave it, did they just sand down the bottom to make it thinner? Do you think it would have been any better mounted the other way now that its done? Thanks in advance!

 

[Siege]

Has anyone taped string to the areas where you want to put the vent to see what airflow is doing at speed? For heat extraction to work the scoop needs to be in a low pressure area of the hood (area where air movement is the fastest). The base of the windshield is a high pressure area at speed and if the vent is too close to it then air will get pushed into the vent which would impact radiator efficiency.

In these pictures the Subaru scoop seems like it would be ok but the the louvered vents look very close to where the high pressure area would be.

Not a truck but a good diagram of high and low air pressure at speed.

 

[RC5280]

Vented Hood

Do you mind me asking how much the hood insulation was? I need to replace mine as well.

 

[jcardona1]

Do you mind me asking how much the hood insulation was? I need to replace mine as well.

$110

http://www.utoyot8.com/FullImage.aspx?ccId=421159541&ppId=228595835&ppInfo=(9001-++++)

http://www.toyotapartseast.com/comp...nd-cruiser_hood-front-fender-53-53-12036.html

 

[Otamiway]

$110

http://www.utoyot8.com/FullImage.aspx?ccId=421159541&ppId=228595835&ppInfo=(9001-++++)

http://www.toyotapartseast.com/comp...nd-cruiser_hood-front-fender-53-53-12036.html

Thanks Jose..... Yeah thats about right.

 

[Otamiway]

Has anyone taped string to the areas where you want to put the vent to see what airflow is doing at speed? For heat extraction to work the scoop needs to be in a low pressure area of the hood (area where air movement is the fastest). The base of the windshield is a high pressure area at speed and if the vent is too close to it then air will get pushed into the vent which would impact radiator efficiency.

In these pictures the Subaru scoop seems like it would be ok but the the louvered vents look very close to where the high pressure area would be.

Not a truck but a good diagram of high and low air pressure at speed.

I have not but I believe that its far enough from the windshield to be effective.

Nothing scientific on this but I believe it works to evacuate the hot air both standing and while driving

 

[1FZj80]

I have not but I believe that its far enough from the windshield to be effective.

Nothing scientific on this but I believe it works to evacuate the hot air both standing and while driving

You might be surprised that the flow when driving is less than you think. Also, since the scoop is backwards, you will get eddy vortex coming over the top pushing air into the scoop opening. Like when driving in the Wagon Queen Family Truckster with the rear slider open Just saying, may not be doing what you expect.

Time for a smoke-bomb test

 

[Otamiway]

You might be surprised that the flow when driving is less than you think. Also, since the scoop is backwards, you will get eddy vortex coming over the top pushing air into the scoop opening. Like when driving in the Wagon Queen Family Truckster with the rear slider open Just saying, may not be doing what you expect.

Time for a smoke-bomb test

You may correct.. No access to a smoke bomb. Best test would be to set it off at highway speed in front of the grill....

One of these days

 

[1FZj80]

You may correct.. No access to a smoke bomb. Best test would be to set it off at highway speed in front of the grill....

One of these days

I would vote for the engine compartment. Then take a drive down the freeway and see how much smoke comes out the scoop. Bet you would get a lot of looks