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C6 the C5 of tomorrow
Joined: Nov 2000
Posts: 6,665
Likes: 2
From: Twin Cities Minnesota
I don't think it's ceramic if you could polish it off. Ceramic is bonded very well to the metal and extremely hard. It's ceramic after all!
I'd bet it's just paint over cheap steel. even steel can be polished brightly.
Also I don't believe the primaries are different metal than the collectors. they are welded together, not easy to do if 1 is stainless and 1 is carbon steel...
does a magnet stick to the pipes? Stainless is not magnetic ( well most types)
Keith
I'd bet it's just paint over cheap steel. even steel can be polished brightly.
Also I don't believe the primaries are different metal than the collectors. they are welded together, not easy to do if 1 is stainless and 1 is carbon steel...
does a magnet stick to the pipes? Stainless is not magnetic ( well most types)
Keith
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
A magnet will stick to all of it except the collector. It sticks to the side pipe slightly so it may be stainless with a chrome coating. Yes you can weld stainless and carbon steel together, been doing it for years. If you use stainless rod, the weld is stainless and use regular rod and the weld will rust but they will all stick together.
When I said I polished it off, I used a 3M rolock disc on a die grinder, never seen paint that tough. But whatever it is, it's not good enough.
No, I wasn't looking for more flow and horsepower, my L-48's 165 horsepower can breath plenty well. I was hoping for a cool look, but it's going to take a little more investment. I'll try to get through this season, then send them to jet hot next winter. Maybe the primarys down by the collector will keep that color for now and not cook off.
Dean
When I said I polished it off, I used a 3M rolock disc on a die grinder, never seen paint that tough. But whatever it is, it's not good enough.
No, I wasn't looking for more flow and horsepower, my L-48's 165 horsepower can breath plenty well. I was hoping for a cool look, but it's going to take a little more investment. I'll try to get through this season, then send them to jet hot next winter. Maybe the primarys down by the collector will keep that color for now and not cook off.
Dean
Last edited by '75; Mar 24, 2008 at 06:04 PM.
Racer
Joined: Apr 2008
Posts: 418
Likes: 0
From: destin fl
A magnet will stick to all of it except the collector. It sticks to the side pipe slightly so it may be stainless with a chrome coating. Yes you can weld stainless and carbon steel together, been doing it for years. If you use stainless rod, the weld is stainless and use regular rod and the weld will rust but they will all stick together.
When I said I polished it off, I used a 3M rolock disc on a die grinder, never seen paint that tough. But whatever it is, it's not good enough.
No, I wasn't looking for more flow and horsepower, my L-48's 165 horsepower can breath plenty well. I was hoping for a cool look, but it's going to take a little more investment. I'll try to get through this season, then send them to jet hot next winter. Maybe the primarys down by the collector will keep that color for now and not cook off.
Dean
When I said I polished it off, I used a 3M rolock disc on a die grinder, never seen paint that tough. But whatever it is, it's not good enough.
No, I wasn't looking for more flow and horsepower, my L-48's 165 horsepower can breath plenty well. I was hoping for a cool look, but it's going to take a little more investment. I'll try to get through this season, then send them to jet hot next winter. Maybe the primarys down by the collector will keep that color for now and not cook off.
Dean
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
You could just tell your wife that you ran the engine too long on initial startup, and the coating wasn't properly "broken in", and burned off. It'll go something like this:
"My fault, sorry honey, didn't know any better, but don't worry, we'll send them off to Jet Hot, and they'll be good as new! I love you!"
Don't worry, it's ok to lie to women, if you are doing it to keep from hurting their feelings. It's just like the old "Does this dress make me look fat?" bit.
Scott
"My fault, sorry honey, didn't know any better, but don't worry, we'll send them off to Jet Hot, and they'll be good as new! I love you!"
Don't worry, it's ok to lie to women, if you are doing it to keep from hurting their feelings. It's just like the old "Does this dress make me look fat?" bit.
Scott
Racer
Joined: Nov 2007
Posts: 367
Likes: 0
From: Las Vegas NV
Don't return them back, that way your wife will think she made a wrong decision when she bought them for you and that will just break her heart. Send them to Jet-Hot and just tell her that they will be much better if they'll be coated.
You are a very lucky man to that wife!
You are a very lucky man to that wife!
It just proves that women DON'T know what men want or need.........................Buy that sh*t yourself!!!!!
has no woman ever done what you wanted or needed?
if so i could never guess why
Melting Slicks
Joined: Aug 2005
Posts: 2,359
Likes: 15
From: Confusion
Don't return them back, that way your wife will think she made a wrong decision when she bought them for you and that will just break her heart. Send them to Jet-Hot and just tell her that they will be much better if they'll be coated.
You are a very lucky man to that wife!
You are a very lucky man to that wife!
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Drifting
Joined: Jan 2005
Posts: 1,389
Likes: 9
From: Seabrook Texas
St. Jude Donor '05
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
You might also want to paint or cover the visible section of rocker panel before you reinstall the pipes [to make it look a little cleaner]. P.S. It's the thought that counts! Kudos to any wife that tries to help her guy with his car hobby.
Drifting
Joined: Apr 2008
Posts: 1,565
Likes: 2
From: Sparta Mo.
The restriction issue is a loaded question. A stock (ish) small block Chevy needs a certain amount of back pressure to run properly. Believe it or not, it takes a pretty mean engine to benifit from open exhaust. Most tame street engines (under 500-600 hp) do better with full exhausts. I do agree however, that the side pipes look super sweet! I'll take a 20 hp kick in the teeth for the look and sound. I just shot my 82 all black and plan to put the flat black pipes on it. I also agree with the majority here. The pipes fit well, just jet hot them and be done with it. After you get them back on the car, give your wife a big hug and kiss for being so thoughtful.
Burning Brakes
Joined: Feb 2000
Posts: 1,246
Likes: 1
This is just such an old wives tale! Backpressure is a 2 stroke thing and it prevents over scavenging from the tuned exhaust pulling the fresh a/f mixture out the exhaust and thus robbing the engine of potential energy.
For a 4 stroke, scavenging is key to evacuate the spent gasses and pull in jsut that little extra fresh mxture during valve overlap (against a rising piston) for just that little additional VE, and for that you need proper exhaust pulse strength, directly related to exhaust volume & speed and therefore to primary size, collector size, shape and length. Do NOT confuse this with backpressure. A 4 stroke engine will perform WORSE with a restrictive exhaust.
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
Update: 1200 miles and 7 months later and the crappy coating is still on the primaries near the collector, but it finished burning off closer to the engine. The strange thing is that they are not rusting yet, the primaries may be something other than mild steel. I had originally planned to get them coated this winter, but with times how they are, I'm going to see if they are rusty in the spring and maybe use some flat black so they don't look too bad till I can afford Jet Hot.
Maybe when I get around to building the 383, I'll do something with the headers then, and also get rid of the reverse flows. Too quiet and will definitely be too restrictive for more than a stock engine.
Maybe when I get around to building the 383, I'll do something with the headers then, and also get rid of the reverse flows. Too quiet and will definitely be too restrictive for more than a stock engine.
Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
Update: 1200 miles and 7 months later and the crappy coating is still on the primaries near the collector, but it finished burning off closer to the engine. The strange thing is that they are not rusting yet, the primaries may be something other than mild steel. I had originally planned to get them coated this winter, but with times how they are, I'm going to see if they are rusty in the spring and maybe use some flat black so they don't look too bad till I can afford Jet Hot.
Maybe when I get around to building the 383, I'll do something with the headers then, and also get rid of the reverse flows. Too quiet and will definitely be too restrictive for more than a stock engine.
Maybe when I get around to building the 383, I'll do something with the headers then, and also get rid of the reverse flows. Too quiet and will definitely be too restrictive for more than a stock engine.
Racer
Joined: Nov 2006
Posts: 357
Likes: 8
From: Champaign Urbana IL
this is wierd, because i have the same product and nothing like this has happend to me.http://forums.corvetteforum.com/c3-t...tallation.html
