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Powder coat motor plate? #2704840
10/08/19 10:55 AM
10/08/19 10:55 AM
Joined: Mar 2010
Posts: 607
Indianapolis In. usa
Quickrunner Offline OP
mopar
Quickrunner  Offline OP
mopar

Joined: Mar 2010
Posts: 607
Indianapolis In. usa
Any one done this? Any issues with sealing? Powder coat cracking around bolt holes?


05 Ram 1500 Daytona package
71 Demon Gen3 hemi drag radial project



Missin' my 9 second 70 runner!
Re: Powder coat motor plate? [Re: Quickrunner] #2704841
10/08/19 10:58 AM
10/08/19 10:58 AM
Joined: Feb 2006
Posts: 436
Alberta, Canada
451Guy Offline
mopar
451Guy  Offline
mopar

Joined: Feb 2006
Posts: 436
Alberta, Canada
I polished and then clear powder coated mine. I had a heck of a time getting it to seal up after. Ended up using the gasket as a template and then ground away the powder coat so sealant had something to stick to.


Thanx 451 Guy

512 cu in 71 Demon Super Street Car
Best ET 9.57 @ 139.96

512 cu in 69 Charger R/T
Best ET 11.39 @ 118.11

Re: Powder coat motor plate? [Re: 451Guy] #2704843
10/08/19 11:08 AM
10/08/19 11:08 AM
Joined: Jan 2003
Posts: 17,239
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 17,239
Las Vegas
Never had an issue with sealing or cracking with powder coating a motorplate. We do it all the time, just looks better. We also have anodized them with zero issues.

Last edited by Al_Alguire; 10/08/19 11:08 AM.
Re: Powder coat motor plate? [Re: Al_Alguire] #2704858
10/08/19 12:11 PM
10/08/19 12:11 PM
Joined: Mar 2010
Posts: 607
Indianapolis In. usa
Quickrunner Offline OP
mopar
Quickrunner  Offline OP
mopar

Joined: Mar 2010
Posts: 607
Indianapolis In. usa
I was thinking anodize would seal better, but everything will match with the powder.


05 Ram 1500 Daytona package
71 Demon Gen3 hemi drag radial project



Missin' my 9 second 70 runner!
Re: Powder coat motor plate? [Re: Quickrunner] #2704866
10/08/19 12:36 PM
10/08/19 12:36 PM
Joined: Jan 2003
Posts: 8,509
MN
J
JERICOGTX Offline
master
JERICOGTX  Offline
master
J

Joined: Jan 2003
Posts: 8,509
MN
Mine is powdercoated. So far, zero issues.

MotovatorSept19-5.jpg

69 GTX 68 Road Runner
Re: Powder coat motor plate? [Re: Quickrunner] #2704877
10/08/19 01:44 PM
10/08/19 01:44 PM
Joined: Jan 2003
Posts: 2,258
A garage in England
Tig Offline
top fuel
Tig  Offline
top fuel

Joined: Jan 2003
Posts: 2,258
A garage in England
After powder coating, we couldn't get the water pump housing to seal for any length of time. It also cracked the powder coat around the mounting brackets , chipped on the edges when we dropped stuff like spanners and vac pumps on it. Looked scruffy after a while. Just have a polished one now.
[Linked Image]

Last edited by Tig; 10/08/19 01:45 PM.

'74 Challenger..9.46 and 145.9 so far, easy pass. 4000lb!!!# N/A, 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 4:10's and 10.5s. Marsh Performance pump gas 655ci.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 14.18 @ 96.05 Best Mph 98.5
Re: Powder coat motor plate? [Re: Quickrunner] #2704881
10/08/19 01:51 PM
10/08/19 01:51 PM
Joined: Jan 2003
Posts: 11,493
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 11,493
Marion, South Carolina [><]
Mine is powdercoated...no problems.


CHIP
'70 hemicuda street car...8.91 at 150.5 mph w/ 4.10s, 8.97 at 152.5 mph w/ 3.54s so far
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler
Re: Powder coat motor plate? [Re: an8sec70cuda] #2704889
10/08/19 02:46 PM
10/08/19 02:46 PM
Joined: Feb 2004
Posts: 31,040
S.E. South Dakota !
bigdad Offline
Still Posting A Lot
bigdad  Offline
Still Posting A Lot

Joined: Feb 2004
Posts: 31,040
S.E. South Dakota !
right stuff .. it will seal, hard to get apart later however grin

Re: Powder coat motor plate? [Re: bigdad] #2705549
10/10/19 01:30 PM
10/10/19 01:30 PM
Joined: Jan 2003
Posts: 11,493
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 11,493
Marion, South Carolina [><]
Ultra Grey silicone works for me.


CHIP
'70 hemicuda street car...8.91 at 150.5 mph w/ 4.10s, 8.97 at 152.5 mph w/ 3.54s so far
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler
Re: Powder coat motor plate? [Re: an8sec70cuda] #2705716
10/10/19 08:51 PM
10/10/19 08:51 PM
Joined: Dec 2005
Posts: 3,096
Fulton County, PA
C
CMcAllister Offline
master
CMcAllister  Offline
master
C

Joined: Dec 2005
Posts: 3,096
Fulton County, PA
I've never felt that powder coating was a fits-em-all coating solution. Not a big fan of it in race car applications depending on what the part is and what it does. Other coating processes make more sense.


If the results don't match the theory, change the theory.
Re: Powder coat motor plate? [Re: CMcAllister] #2705862
10/11/19 10:42 AM
10/11/19 10:42 AM
Joined: Jan 2003
Posts: 17,239
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 17,239
Las Vegas
Just dropped off dragster motor plate yesterday to get done. Oh yeah valve covers and valley plate too.

Re: Powder coat motor plate? [Re: Al_Alguire] #2706141
10/12/19 09:31 AM
10/12/19 09:31 AM
Joined: Mar 2008
Posts: 219
NY
challenger451ci Offline
enthusiast
challenger451ci  Offline
enthusiast

Joined: Mar 2008
Posts: 219
NY
Mine is Power Coated with no issues. I used Sand-Tex finish. It has a slight texture to it which I felt would allow the sealer to bite a bite. Not sure if it helps or hurts, but no issues sealing with Great Stuff RTV. Fair amount of street driving too.

Re: Powder coat motor plate? [Re: challenger451ci] #2706223
10/12/19 02:13 PM
10/12/19 02:13 PM
Joined: Aug 2003
Posts: 33,630
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 33,630
Bend,OR USA
Both my mid plate and front motor plate where black anodized when I got the car, I talked to a older tech from Power master this morning( he was catching up on tech calls up)that I had left a message from this past Thursday about what size(gauge) wire to use on my car with one of their 100 amp single wire after burning up the single #10 I had used originally by accidently grounding out the charging lug on the alternator at the Mopar race at Sacramento last month whiney
He said to use a #4 cable directly to the battery and make sure and use a #4 ground from the threaded grounding hole in the alternator back to a threaded hole the engine block to ground the alternator do to the anodizing being a insulator and a bad conductor for the ground from the alternator shock work
I'm going to do that this winter to see if I can get rid of some ignition gremlins I've had with this car luck

Last edited by Cab_Burge; 10/12/19 02:15 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Powder coat motor plate? [Re: Cab_Burge] #2706258
10/12/19 06:55 PM
10/12/19 06:55 PM
Joined: Nov 2013
Posts: 289
Southern Alberta
Uberpube Offline
enthusiast
Uberpube  Offline
enthusiast

Joined: Nov 2013
Posts: 289
Southern Alberta
This topic came up on one of the FB car groups I read, the question was why a good majority of Japanese shops don't paint their motors and accessories. I worked in a couple of shops in Japan and the answer was for a couple of reasons.

1) Paint interferes with grounds.
2) If the paint is thick between bolted parts, it can crack, chip and fall away making the parts loose especially if mounting bosses are painted. . If the car is going racing, they won't paint anything , they will polish a lot of parts though.

One pretty famous tuner there also swears that painted motors run hotter according to what he saw on his engine dyno.

Re: Powder coat motor plate? [Re: Uberpube] #2706263
10/12/19 07:21 PM
10/12/19 07:21 PM
Joined: Aug 2003
Posts: 33,630
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 33,630
Bend,OR USA
Originally Posted by Uberpube
T

One pretty famous tuner there also swears that painted motors run hotter according to what he saw on his engine dyno.

Years ago, early to mid 1970s, I use to see a lot of NHRA Modified Production racers with bare heads and blocks, some Super Stock cars from east of the Rockies Mountains also work Depending on the type and viscosity of the paint will determine how god or bad it seals up the cast iron and aluminum work
I had one TM7 intake and one set of cast aluminum BB valve covers powder coated black, they ran so dang hot and wouldn't cool down quickly I never did that again realcrazy
That black plastic powder coating really held the heat in those parts, NOT GOOD tsk

Last edited by Cab_Burge; 10/12/19 07:21 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Powder coat motor plate? [Re: Cab_Burge] #2706395
10/13/19 12:12 PM
10/13/19 12:12 PM
Joined: Dec 2005
Posts: 3,096
Fulton County, PA
C
CMcAllister Offline
master
CMcAllister  Offline
master
C

Joined: Dec 2005
Posts: 3,096
Fulton County, PA
Again, I'm not a fan of powder on race car parts.

I wouldn't use it on engine parts. I paint iron blocks, for appearance and rust concerns, but I don't go crazy with it.

For everything else, you spend the time to make stuff fit nice, keep your tolerances tight, fasteners fit the holes, rod ends fit in brackets, assemblies fit mounts. Then put a thick coating of powder on stuff and nothing fits, So you grind, drill, ream, etc., to fix grounds, fits, tight holes, etc. It's OK for some things, but most of this stuff I prefer paint or nothing.


If the results don't match the theory, change the theory.
Re: Powder coat motor plate? [Re: Quickrunner] #2706452
10/13/19 04:34 PM
10/13/19 04:34 PM
Joined: Jan 2003
Posts: 26,256
Oregon
A
AndyF Offline
Too Many Posts
AndyF  Offline
Too Many Posts
A

Joined: Jan 2003
Posts: 26,256
Oregon
I don't think I'd powder coat a motor plate but that doesn't mean it won't work. I think it is just up to you and what look you are going for.


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