Project Deimos: An LS Coupe Build - DIY Powder Coat Oven Complete

[Jeff Kleiner]

Hopefully the Weize is better than an Optima...but if not at least it was only half price

Jeff

[JimStone]

Hopefully the Weize is better than an Optima...but if not at least it was only half price

Jeff

Haha, my thoughts exactly. And if I ever get it down to you for paint, I'll be sure to bring the charger

[JimStone]

Been a while since my last update. I finished the stainless brake and fuel lines several weeks ago. Used 37 degree flares for AN fittings throughout.

Never could figure out double flare with the Eastwood tool for the SS brake lines, so switched to AN which makes it a breeze.


















Made PTFE stainless flex fuel lines to the fuel tank. Screwed up and broke my first Pro-M hanger, so this is my second one. Note to others: DON'T OVERTIGHTEN or the AN fitting welds will break.





Made a vent line for the differential

[PNWTim]

Looks great. I like the little diff vent - can you please share where you got it?

[burchfieldb]

Nice work!

[JimStone]

I found making hard lines fun, so I decided to make hard lines to/from the power steering rack, power steering fluid cooler, and reservoir. The connections to the pump on the motor will be flex line.





Using a Keyser brand power steering fluid reservoir, which I swear is the same as the Moroso and other brands, bust $80 less expensive.




I powder coated it anyway.









Also made hard lines to the fuel regulator








But recently I took a little detour from working on the car itself. I really wanted to powder coat my own panels, and do it at my own pace. I also want to Cerakote my side pipes. So I decided to build a bigger powder coat oven.






It will have 2 oven elements with 7000W total power. I'm going to wire it so I can add an element if the two elements are insufficient. Will have an air recirculating fan and it will be on casters so I can wheel it to/from my outside garage.

Will show more details as I get it finished.

[JimStone]

Looks great. I like the little diff vent - can you please share where you got it?

I actually went through several iterations that I weren't happy with before finding the following simple solution:


Stainless 1/4" barbed to 1/4" NPT coupler

https://www.amazon.com/dp/B07DVYC1XG...fed_asin_title





And a little stainless exhaust muffler

https://www.amazon.com/dp/B08MZ3L58G...sin_title&th=1

[PNWTim]

Pretty clever combo, thanks for the info.

[460.465USMC]

Congrats on your SS hard lines, Jim! They look great.

Being able to PC your larger panels will be really handy. Looking forward to seeing your oven up and running.

Do you happen to have the info on the boat latch and strut for your trunk box? I like your setup and considering something similar.

[JimStone]

Congrats on your SS hard lines, Jim! They look great.

Being able to PC your larger panels will be really handy. Looking forward to seeing your oven up and running.

Do you happen to have the info on the boat latch and strut for your trunk box? I like your setup and considering something similar.

Thanks Chris


Here's the latch I used



https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1



And the strut



https://www.amazon.com/gp/aw/d/B0CY2...b_b_asin_image

Less than $20 combined

[JimStone]

I finished my powder coat oven, which ended up being a pretty fun side-project. And, shockingly, it all worked the first time I plugged it in.


I based the design on this DIY tutorial: https://www.powdercoatguide.com/2014...ting-oven.html

But I simplified a few things, because I'm not looking to make a business out of this or anything. I just wanted to have the ability to powder coat my own panels and Cerakote the exhaust at my own pace. It'll probably end up being a wash cost-wise for the Coupe, but I'll come out ahead if I do subsequent projects.


My oven ended up being 4' x 3' x 6.5' outside dimensions. The interior oven is about 3.5' x 2.5' x 6', so about 90 cubic ft. Big enough to fit the largest aluminum panels and the side pipes.








Materials List:

Structure:
3-5/8" galvanized steel framing studs (20 gauge, 10 ft) x 14-15
Galvanized steel stud track, 10 ft, x 10
9 sheets of 4x7' aluminum sheeting
16 gauge steel sheet for floor
1/8" and 3/16" steel rivets x 800+ (probably overdid it)

Door:
24 inch stainless piano hinges x 2
Door clamps x 2
Single gate caster wheel with spring

Insulation/sealing:
R-19 unfaced fiberglass insulation x 3 rolls
Aluminum high temp sealing tape
High temp RTV silicone
Tadpole gasket for door

Oven bake element x 3 (3500W apiece)
High temperature spade connectors for bake elements

Centrifugal blower fan for a wood furnace - 196 CFU

Controller box / electrical:
PID temperature controller
40A solid state relays x 2
10AWG THHN wire x 50 feet
11AWG high temp wire
Large electrical junction box
PID temperature controller
40A solid state relays x 2
Volt/amp meter
240v rotary switches x 2
Fan motor rheostat
DIN rail components
Cylindrical fuse holder x 2, with 0.5A and 5A cylindrical fuses (for PID controller and fan)
40A circuit beaker (for oven elements)
120v Extension cord - 20 ft
50A, 240v appliance power cord - 10 ft
1/2 and 3/4" EMT conduit, fittings, and 2x junction boxes

Miscellaneous:
Set of 4 casters with brakes



Got pretty much everything from Amazon, except the framing supplies and sheet metal.











I had never used steel framing studs and tracks before, but they're very easy to use













Wool insulation is recommended, but would have been an extra $100 or more, so I went with fiberglass. Is good enough.







This last pictures show the recirculating vent and where the fan will go. The vent helps redistribute the hot air at the top back to the bottom, because otherwise the top of the oven can be 50-75 degrees different and not good for the coating

[JimStone]

The major driver of cost for these ovens is the price of steel sheet to skin the thing. At least 20 gauge steel is recommended, but that was just way too expensive for me. I estimated $850+ for steel sheet alone. So I went a much cheaper route (and will have to deal with some inefficiency). I live near Elkhart, Indiana where there are numerous RV manufacturers. People sell slightly imperfect aluminum panels from the RV industry on Marketplace for cheap. I got all my aluminum sheet for the project for $100. It's 0.032 inch (20 gauge). Not nearly as good at heat retention, but it gets the job done along with R19 insulation, aluminum sealing tape and high temp RTV sealant.











I originally planned for 2 heating elements, but decided to build in another. Easier to do it now than later.




The wiring organization didn't turn out very pretty. I'll have to do better on the Coupe.





It worked first try!







My nifty amp/volt meter showed a problem though - the oven was drawing 43A, which is more than my garage's 240V circuit is wired for (wired for 40A).






So I actually had to deactivate the 3rd heating element. Now drawing about 28A





I'm working out calibration of the PID controller. And I learned quickly I need to run it through some heat cycles OUTSIDE because it was off-gassing some nasty fumes (probably from the backsides of the aluminum sheet, which have some sort of gray paint).


Using an infrared thermometer, there is definitely some hot spots on the back (where the heating elements are closest to the skin) and near my recirculating fan. It gets up to at least 450 degrees inside (the highest I've tried so far).

Most powder coating has temp range of 375-425 F. The high temp Cerakote for exhaust needs 500 F though.

[Higgybulin]

That turned out sweet! Keep us posted on how it works.
Happy Holidays!
Higgy

[burchfieldb]

That turned out really nice! That will be super handy to have on site.

[460.465USMC]

Nice work, Jim! Very cool project. Thanks for posting.

[PNWTim]

Man, I love DIY stuff like this! Merry Christmas to you! I will enjoy watching how well it works and seeing the professional results.

[JimStone]

Thanks guys!

I got it up to 550F, so it gets plenty hot.

The aluminum panels inside expand in the heat (another reason not to use aluminum), causing some warping , but it still keeps temp.