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Old 11-23-2014, 04:39 PM   #11 (permalink)
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Rebuilding the rear wheel strakes in sheet metal fer the first time. This should keep the extra air from flowing into the trailer when I'm towing it.




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Old 11-23-2014, 05:36 PM   #12 (permalink)
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Both sides done! Whew!

Rear shot...
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Old 11-23-2014, 06:05 PM   #13 (permalink)
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Old 11-23-2014, 10:53 PM   #14 (permalink)
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Sized up the strakes so they are at the proper angle. Matched up the diffuser to the strake angle as well. I'm guessing it's close to 2°? I guess I should leave the back of the rear strakes open?



A quick paint job...
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Old 11-24-2014, 05:39 AM   #15 (permalink)
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Quote:
I guess I should leave the back of the rear strakes open?
I'd guess more important to close them at the front. I can see daylight through them in the pre-paint picture.

Since it's sheet metal, what's all the wood for?
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Old 11-24-2014, 08:09 AM   #16 (permalink)
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Quote:
Originally Posted by freebeard View Post
I'd guess more important to close them at the front. I can see daylight through them in the pre-paint picture.

Since it's sheet metal, what's all the wood for?
It is enclosed from the front. The daylight you see is from either gap betweeen the quarter panel and the top of the stake or the exhaust cutout as I have to allow fer the exhaust pipe to expand and stretch as it heats up.

The wood is fer support and fastening points. One of the rules I have fer my mods is no drilling into the frame or body sheet metal.
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Old 11-24-2014, 05:19 PM   #17 (permalink)
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strakes open at back

The mudflaps should take care of any errant flow trying to mess things.
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Old 01-25-2015, 03:06 PM   #18 (permalink)
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Been dealing with some popping and cracking noises that seemed to come from the front of the truck. I had to pull the diffuser out since my hitch receiver had broken the welds off of the receiver reinforcement and git that re-welded back on.

In the process I discovered that the 2x4 metal studs I used fer building the diffuser with had cracked from the frame flexing. Lucky fer me, it wasn't catastrophic! With the diffuser removed, the popping/cracking noises disappeared!

I ended up replacing those studs with some 2x4 wood studs and extended the length to include the extended diffuser. The trailer bottom gap cover will still be attached to the rear diffuser without any issues. I did add extra hinges to allow the diffuser more articulation when the rear axle goes up and down.

Broken studs...


New wood studs...




New hinges to allow fer more articulation...


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Old 09-14-2015, 12:52 PM   #19 (permalink)
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I could hear some extra scraping noises when I was backing up and also that my mileage hasn't been where it had been in the past so I started looking around the rig to see what might have changed. A quick peek under the rig I noticed that the rear diffuser had sagged in the middle rear below the rear axle.

Pulled the rear diffuser off and installed a slotted metal 90° angle iron to better support the middle load across the diffuser.


I also installed a rubber strap in the middle to better support the diffuser load from bouncing instead of relying on the rear wheel strakes to support the pounding from the diffuser.

I can now install my rear vent panel without any significant gaps.


Current rear view...


Hopefully this will reinstate my mileage again.
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Old 09-17-2015, 02:34 AM   #20 (permalink)
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Nice! looks cool!

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