02-17-2010
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#1
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
Drives: Lancer and Durango
Posts: 7,017
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Polishing the cast manifold.
Hey guys, This may seem like a stupid question but its probably one that no one wants to ask because of the flaming that may ensue. So i will.
The stock cast manifolds are really ugly when they get that rust on there, look like a brown peice of Crap attached to your nice shiney turbo/head.
Ive been googleing and found a couple sites and methods that have to deal with polishing cast iron.
One method describes first putting it in an electrolisys bath for a day or two, then using sand paper and slowly going from a gritty one to a more smooth one. (the guy said start using 50 grit and moving up from there.)
Another post where they were restoring a cast oven, discribed using a sand blaster or also recommended using a wirewheel on a drill.
What have you guys found to be the best to make it come up with the nicest finish. Besides just ceramic coating.  Honestly, if its possible i would like to see a mirror finish. but i dont know if thats possible with cast iron. but who knows.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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02-17-2010
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#2
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formerly ecoli
Join Date: Oct 2003
Location: On the dyno
Posts: 4,892
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Re: Polishing the cast manifold.
Best way it to throw it in the trash and get a decent intake manifold.
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02-17-2010
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#3
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
Drives: Lancer and Durango
Posts: 7,017
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Re: Polishing the cast manifold.
Quote:
Originally Posted by ecoli
Best way it to throw it in the trash and get a decent intake manifold.
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Exhaust manifold not intake manifold. Thought i would correct you so that some kid doesnt try to put an intake mani on the exhaust side.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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02-17-2010
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#4
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immune from paybans
Join Date: Oct 2005
Location: West Des Moines
Drives: poorly
Posts: 4,358
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Re: Polishing the cast manifold.
Quote:
Originally Posted by tpunx99GSX
Exhaust manifold not intake manifold. Thought i would correct you so that some kid doesnt try to put an intake mani on the exhaust side.
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How about your sheet metal exhaust manifold idea? That would be nice and shiny. SMEM anyone?  |
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02-17-2010
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#5
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R U DTF bro?
Join Date: Aug 2003
Location: Oak Point, TX
Drives: C8 Stingray Z51
Posts: 20,620
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Re: Polishing the cast manifold.
Just do a silver ceramic coating. That way you'll actually see some benefits and it'll stay silver and not just rust immediately again.
__________________
Quote:
Originally Posted by Murlo26
I agree with Kracka.
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02-17-2010
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#6
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
Drives: Lancer and Durango
Posts: 7,017
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Re: Polishing the cast manifold.
Quote:
Originally Posted by Kracka
Just do a silver ceramic coating. That way you'll actually see some benefits and it'll stay silver and not just rust immediately again.
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This is supposed to be a boredom project that to me sounds fun. (at least until i get bored of that. Dont want to just pay someone to do this, i want to put in the time and effort and see the results.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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02-17-2010
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#7
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formerly ecoli
Join Date: Oct 2003
Location: On the dyno
Posts: 4,892
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Re: Polishing the cast manifold.
Best way is to throw it in the trash and get an FP exhaust manifold. |
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02-17-2010
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#8
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
Drives: Lancer and Durango
Posts: 7,017
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Re: Polishing the cast manifold.
nm
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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02-17-2010
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#9
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 Sonic Champion!
Join Date: Jul 2005
Location: Litchfield
Drives: VA STI
Posts: 1,793
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Re: Polishing the cast manifold.
Quote:
Originally Posted by ecoli
Best way is to throw it in the trash and get an FP exhaust manifold. |
Lulz
I don't know why you would spend that much time trying to make a stock exhaust manifold look good. Put a heat shield on it or buy a different, better manifold. |
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02-17-2010
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#10
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aka Goodbye
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Re: Polishing the cast manifold.
Quote:
Originally Posted by ecoli
Best way is to throw it in the trash and get an FP exhaust manifold. |
And then watch it rust, or at least look like absolute dogshit. I'm coating mine this spring. |
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02-17-2010
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#11
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
Drives: Lancer and Durango
Posts: 7,017
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Re: Polishing the cast manifold.
I think im going to start with electrolysis to clean the exhaust manifold. Ill post pics after this is complete. Should be a fun way to pass the time while my other parts are coming in. using this method http://users.eastlink.ca/~pspencer/n...ctrolysis.html
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
Last edited by tpunx99GSX; 02-17-2010 at 11:41 AM..
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02-17-2010
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#12
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formerly ecoli
Join Date: Oct 2003
Location: On the dyno
Posts: 4,892
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Re: Polishing the cast manifold.
How about a nice heat shield.
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02-17-2010
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#13
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
Drives: Lancer and Durango
Posts: 7,017
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Re: Polishing the cast manifold.
Quote:
Originally Posted by ecoli
How about a nice heat shield.
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LOL Your just mad because you didnt think of it first.. HA HA HA
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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02-17-2010
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#14
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Join Date: Nov 2005
Location: Cottage Grove
Drives: Silver '02 IS300, Blue '06 Suzuki SV1000
Posts: 5,293
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Re: Polishing the cast manifold.
Umm, you know that it's just gonna rust again almost immediately, don't you?
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'02 Lexus IS300
'06 Suzuki SV1000: Back on the road and ripping hard as ever!
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02-17-2010
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#15
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Polishing the cast manifold.
Polishing cast metal is like trying to polish a turd.
__________________
"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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02-17-2010
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#16
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
Drives: Lancer and Durango
Posts: 7,017
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Re: Polishing the cast manifold.
Quote:
Originally Posted by Matt D.
Polishing cast metal is like trying to polish a turd.
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Mythbusters actually busted that myth that you cant polish poop. They had a guy do it with his hands. made it nice and shiney.
http://www.youtube.com/watch?v=hBj6PonX14A
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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02-17-2010
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#17
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R U DTF bro?
Join Date: Aug 2003
Location: Oak Point, TX
Drives: C8 Stingray Z51
Posts: 20,620
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Re: Polishing the cast manifold.
The best will be when he flips it over after polishing one side to find the other side is already rusted again 
__________________
Quote:
Originally Posted by Murlo26
I agree with Kracka.
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02-17-2010
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#18
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
Drives: Lancer and Durango
Posts: 7,017
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Re: Polishing the cast manifold.
I believe i saw something that said you can get the manifold clear powder coated.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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02-17-2010
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#19
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Polishing the cast manifold.
Quote:
Originally Posted by tpunx99GSX
I believe i saw something that said you can get the manifold clear powder coated. |
Ha, yes do this. We could take bets from everyone on what color it will be after a 30 minute drive, or if there will even be anything left. Then use that money from the bets to buy a heatshield or a different manifold. |
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02-17-2010
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#20
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Join Date: Nov 2005
Location: Cottage Grove
Drives: Silver '02 IS300, Blue '06 Suzuki SV1000
Posts: 5,293
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Re: Polishing the cast manifold.
But it's still a turd 
__________________
'02 Lexus IS300
'06 Suzuki SV1000: Back on the road and ripping hard as ever!
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