Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
> Local guy wanted too much to powder coat my engine tins, So I built an oven instead
stugray
post Feb 5 2017, 07:05 PM
Post #1


Advanced Member
****

Group: Members
Posts: 3,824
Joined: 17-September 09
From: Longmont, CO
Member No.: 10,819
Region Association: None



I wanted to powder coat the engine tins myself but some of the pieces are pretty large.
And I wanted to be able to do my steelies as well.

So I had a 48"X30"X30" gang box in my backyard taking up space.

I bought a old working electric oven from a local scrapyard for $10 and it worked.
Pulled the guts out of it for the demonstration.

First I built a "core skeleton" to hold the inner box and the coils:
(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1486343146.1.jpg)

It's useable space will be 18" X 18" X 36".
Then I lined it with aluminum foil and 2X layers of R13 fiberglass with the paper removed.

(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1486343146.2.jpg)

Then I finished out the box and installed the coils:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1486343146.3.jpg)

Finally I made a hollow metal box for a lid and packed it with more fiberglass and finished:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1486343147.4.jpg)

It works for a couple of first runs, but the heating is way too extreme when the coils turn full on.
I expected this behavior because the oven has almost zero thermal mass inside the oven cavity.
So I will install a thermal shield over the coils out of steel plate (like 3/8" or so).
That should slow the response time of the oven and give a much more control-able temp.

I also ordered some 240V Solid State relays.
I'll stick a raspberry pi to it with a temp sensor and allow it to control the coils with wifi access and control.
I also have a temp datalogging capability I will incorporate.

I will post some pics of doing my engine tins. They are stripped ready for me to decide what color I want to do them in.
I have stock-like Matte Black, Semi-Gloss Black.
I also have clearcoat, and "Black Chrome" which is really just a smoky, highgloss clearcoat.

So I am considering putting that or clear over the stripped clean metal engine tins.
I like the look of the bare metal scrubbed clean.
Even with the imperfections and few bits of rusty patches, it looks kind of "steam-punk" and I might go with it.
I'll post some pics of the tins soon.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ConeDodger
post Feb 5 2017, 08:55 PM
Post #2


Apex killer!
***************

Group: Members
Posts: 23,586
Joined: 31-December 04
From: Tahoe Area
Member No.: 3,380
Region Association: Northern California



Nice job! McMark also built his own oven. He left it behind when he went to Michigan. I wonder if he'll build another? (IMG:style_emoticons/default/dry.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
stugray
post Feb 5 2017, 11:18 PM
Post #3


Advanced Member
****

Group: Members
Posts: 3,824
Joined: 17-September 09
From: Longmont, CO
Member No.: 10,819
Region Association: None



Here are the engine tins:
(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1486358291.1.jpg)

(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1486358291.2.jpg)

(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1486358292.3.jpg)

The rear one is the only one that has had a final prep.

So what does everyone think of just giving these main tins basically a clear coat to keep that raw look?

And for the careful observers, yes my tins have been modified.
1 - I have an access hole to allow me to get to spark plug#3 for a CHT probe
2 - I have cutouts on each side of the engine to clear my suspension pickup point supports
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Feb 6 2017, 07:22 AM
Post #4


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None



Love the suspension cutouts. (IMG:style_emoticons/default/wub.gif)

QUOTE(ConeDodger @ Feb 5 2017, 09:55 PM) *

Nice job! McMark also built his own oven. He left it behind when he went to Michigan. I wonder if he'll build another? (IMG:style_emoticons/default/dry.gif)

No it's here. (IMG:style_emoticons/default/wink.gif)

Wood framing, mineralwool insulation. And I've had it beyond 700-degress (by accident) without issue, though I do not recommend it.

I used a couple controller modules and 220v relays off eBay to add temp control and power timer.

But I'm thinking about selling it since blasting and applying powder takes quite a long time and for me I'm not sure the cost-benefit works out the right way.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
brant
post Feb 6 2017, 09:18 AM
Post #5


914 Wizard
**********

Group: Members
Posts: 11,623
Joined: 30-December 02
From: Colorado
Member No.: 47
Region Association: Rocky Mountains



Very nice!

Did you chemically strip the pieces?
Good job. Nice build
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
stugray
post Feb 6 2017, 09:29 AM
Post #6


Advanced Member
****

Group: Members
Posts: 3,824
Joined: 17-September 09
From: Longmont, CO
Member No.: 10,819
Region Association: None



QUOTE(brant @ Feb 6 2017, 08:18 AM) *

Very nice!

Did you chemically strip the pieces?
Good job. Nice build


I stripped the pieces with Zep purple degreaser at high concentration.
Soaking each piece for a few hours with a heater in the tank stripped almost all of the original paint.
Final prep was a wire wheel on a 4" grinder or green scrub pads.

How do you think the tins will look with the bare metal and clear coat?
I thought it would brighten up the engine bay a little more than the boring black.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JeffBowlsby
post Feb 6 2017, 09:36 AM
Post #7


914 Wiring Harnesses
*****

Group: Members
Posts: 8,505
Joined: 7-January 03
From: San Ramon CA
Member No.: 104
Region Association: None



Did a search...you've been working on this project awhile!

http://www.914world.com/bbs2/index.php?sho...;hl=chrome+tins

I saw some chrome tins once, did not look good in my opinion. See the thread for some great painted solutions.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
stugray
post Feb 6 2017, 10:00 AM
Post #8


Advanced Member
****

Group: Members
Posts: 3,824
Joined: 17-September 09
From: Longmont, CO
Member No.: 10,819
Region Association: None



QUOTE(Jeff Bowlsby @ Feb 6 2017, 08:36 AM) *

Did a search...you've been working on this project awhile!

http://www.914world.com/bbs2/index.php?sho...;hl=chrome+tins

I saw some chrome tins once, did not look good in my opinion. See the thread for some great painted solutions.


I had forgotten about that thread.
Back then I used rattle can paint and found that it just wiped right off if it got gasoline on the tins.
Now that I had the engine out again I decided to do it right this time.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
matthepcat
post Feb 6 2017, 10:05 AM
Post #9


Meat Popsicle
***

Group: Members
Posts: 1,462
Joined: 13-December 09
From: Saratoga CA
Member No.: 11,125
Region Association: Northern California



What about color matched to the paint job?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
stugray
post Feb 6 2017, 10:25 AM
Post #10


Advanced Member
****

Group: Members
Posts: 3,824
Joined: 17-September 09
From: Longmont, CO
Member No.: 10,819
Region Association: None



QUOTE(matthepcat @ Feb 6 2017, 09:05 AM) *

What about color matched to the paint job?


Funny you mention that. I also got "Kawasaki Ninja green" powder coat.
So the thought HAD crossed my mind.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Feb 6 2017, 01:01 PM
Post #11


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None



Too matchy-match for me. (IMG:style_emoticons/default/tongue.gif) Plus engine's are dirty places. If you coat it green, you better love spending time cleaning, or not be OCD. (IMG:style_emoticons/default/laugh.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JeffBowlsby
post Feb 6 2017, 04:16 PM
Post #12


914 Wiring Harnesses
*****

Group: Members
Posts: 8,505
Joined: 7-January 03
From: San Ramon CA
Member No.: 104
Region Association: None



The quality and durability of a paint coating application is not only the quality of material but also priming and surface preparation. Prolly don't need to tell you that.

An $8 rattle can paint job is in no way comparable to a high quality application using quality materials and workmanship. I have seen powder coatings fail too. Must check all the boxes to get it right.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
brant
post Feb 6 2017, 07:05 PM
Post #13


914 Wizard
**********

Group: Members
Posts: 11,623
Joined: 30-December 02
From: Colorado
Member No.: 47
Region Association: Rocky Mountains



QUOTE(stugray @ Feb 6 2017, 08:29 AM) *

QUOTE(brant @ Feb 6 2017, 08:18 AM) *

Very nice!

Did you chemically strip the pieces?
Good job. Nice build


I stripped the pieces with Zep purple degreaser at high concentration.
Soaking each piece for a few hours with a heater in the tank stripped almost all of the original paint.
Final prep was a wire wheel on a 4" grinder or green scrub pads.

How do you think the tins will look with the bare metal and clear coat?
I thought it would brighten up the engine bay a little more than the boring black.


It might look very cool
I would hold the on the motor or engine bay and view first.
But I like the idea

I have a bare motor in the middle of my garage if you need as a point of reference
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 15th May 2024 - 03:04 AM