My Intercooler project

**suburbanK-2500HD** · 07-03-2010, 12:40

Here is some pics from my project, got my hands on a used, dented hood.
Fixed the dents, and cut hole in it today.
will remove the supports when i figure out how to replace them with someting else around the hole....

The scoop is from a damaged Subaru Forester Diesel.

**Yukon6.2** · 07-04-2010, 08:44

Hi
Looks like a great project.Would love one for my tow truck.
How about using some heavy guage pipe around the hole,should be able to bend it to match the opening and weld the remaining supports to it.Roll the edge of the hole around it for a finished look a few spot welds should keep the tin from rattling
Keep the pic's coming
Thomas

**bl78ljb** · 07-04-2010, 20:50

Looks great, I can't wait to see the finished photos! When you get done you will have to give us a supply list in case someone wants to duplicate it.

**a5150nut** · 07-04-2010, 22:09

Are you planning on running an electric fan to move air over the cooler when in traffic or slow climbs on long hills?

**suburbanK-2500HD** · 07-06-2010, 11:13

Originally Posted by Yukon6.2

Hi
Looks like a great project.Would love one for my tow truck.
How about using some heavy guage pipe around the hole,should be able to bend it to match the opening and weld the remaining supports to it.Roll the edge of the hole around it for a finished look a few spot welds should keep the tin from rattling
Keep the pic's coming
Thomas

Thanks

There is a insert for the scoop. will post pics later today, then you willse the way it works.

**suburbanK-2500HD** · 07-06-2010, 11:14

Originally Posted by bl78ljb

Looks great, I can't wait to see the finished photos! When you get done you will have to give us a supply list in case someone wants to duplicate it.

Thanks

No problem, will share, and help anyway i can.

**suburbanK-2500HD** · 07-06-2010, 11:16

Originally Posted by a5150nut

Are you planning on running an electric fan to move air over the cooler when in traffic or slow climbs on long hills?

Nope. no fans just natural breathing, It will always be a little heat issue when driving slow, but not worse than other cars with top mounte cooler..

**DmaxMaverick** · 07-06-2010, 11:32

Before you commit to a hood scoop, you should be doing some experimental airflow tests. You may be surprised how the air flows over a vehicle at different ground speeds. The middle of the hood is probably the poorest location for either positive or negative airflow. Just off the cuff, I'd guess your location for the scoop will likely be counter-productive, meaning you'll have a heat soaked heat exchanger, and no way to flow cool air through it when you need it most. In the absence of effective ducting and/or forced air (electric fan, etc.), you may be left with a "feels good, looks good" hood ornament.

**DennisG01** · 07-07-2010, 11:31

Originally Posted by DmaxMaverick

Before you commit to a hood scoop, you should be doing some experimental airflow tests. You may be surprised how the air flows over a vehicle at different ground speeds. The middle of the hood is probably the poorest location for either positive or negative airflow. Just off the cuff, I'd guess your location for the scoop will likely be counter-productive, meaning you'll have a heat soaked heat exchanger, and no way to flow cool air through it when you need it most. In the absence of effective ducting and/or forced air (electric fan, etc.), you may be left with a "feels good, looks good" hood ornament.

Along those lines...

Last winter I noticed that snow and ice actually moved forward, faster and faster, on the hood as I drove faster and faster --- NOT due to gravity! Due to air actually rushing forward along the hood.

Below is the thread with a better description (note I have a bug deflector mounted on the front of the hood so this may accentuate what's happening - w/o a deflector, it may not pose nearly as much of a problem for you).

But, take DMax's advice and do some flow tests to see just how high that scoop needs to be in order to be effective. Duct taping some large "L" brackets on the hood (in a few key spots) with yarn tied at various heights would do the trick. On the flip side, your workmanship looks great!

http://www.thedieselpageforums.com/t...highlight=hood

**suburbanK-2500HD** · 07-09-2010, 13:22

I did a quick test today, and it looks ok, i drove at max 60km\h
i used duck tape, and spread it in the area i want to use in a L shape.
From 30km/h - 60km/h they was mooving ok, the tape is 50mm wide.
Will try other speeds, and type of tape...

**DmaxMaverick** · 07-09-2010, 15:03

Just using "tape" is not very good. Tape yarn, string or ribbon (use a color in contrast to the hood color), about 6"/15mm long, to the hood in various locations approximately 8"/20mm apart. You should get a good "picture" of the actual airflow. It helps if you use a video camera to record the results and narrate the speeds as you go. Vary speeds from 20 MPH to your maximum highway speed and note the changes, and hold the speed for a minute or so at each speed change (to eliminate temporary conditions). If you plan to EVER use a bug deflector at any time in the future, all the info you collect without one will be absolutely useless, and will likely negate your efforts. It would be helpful to test with and without one.

**suburbanK-2500HD** · 07-14-2010, 14:00

Hi

i wont be usin the bug deflector with the hood scoop, so when i find time for it, i wil do some more test on the air thingie

**suburbanK-2500HD** · 08-09-2010, 15:24

Her are some pictures from this evening, gettting closer to the end now...

**spiff** · 08-09-2010, 18:59

When NASCAR hoods looked like this the opening was actually at the rear of the hood just in front of the windshield. You might want to take a look at, say a photo of a '65 Ford NASCAR racer and note that the scoop looks like it was on backwards. The highest pressure is at the base of the windshield. The lowest is usually from after the first 1/4 of the hood to near the windshield.
Tufting is the process using yarn that others are recommenting that you do. This is absolutly necessary as intuition about airflow is so often wrong. Also, its not entirely necessary to put the tufting on any support. In fact, the supports will have their own affect on airflow. Just glue the 4-6 inch pieces of yarn directly to the hood. The camera is great idea, and running at different speeds is necessary as the airflow will likely change direction with speed. Also, any traffic going either way will disrupt your experiment. A long untraveled portion of road is necessary to obtain good results.

**suburbanK-2500HD** · 08-23-2010, 10:51

Some updated pics from the hood.

Will get it finished later this week..

**93GMCSierra** · 08-23-2010, 12:29

I would add a pusher fan between the hood opening and the intercooler. It should pull cooler fresh air in at any speed and it wont matter if the opening is not at a high pressure spot.

**suburbanK-2500HD** · 09-10-2010, 08:52

At last the hood is finished.
Installed it yesterday, wil start on the intercooler install today...

**arveetek** · 09-10-2010, 13:08

Very cool! Nice work. I like it.

Casey

**suburbanK-2500HD** · 09-10-2010, 13:19

Originally Posted by arveetek

Very cool! Nice work. I like it.

Casey

Thanks, it came out nice in the end...

**JTodd** · 09-10-2010, 13:27

I am not sure if it will work, but I really like the look of it. Well done.

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