Lets not start a flaming thread...I was wondering the same thing about the heat shield....will taking it off benefit the car cause of weight reduction or will it hurt cause of less heat dispersion?
It is simply a stamping that weighs nearly nothing and says "HOT" on it. It is there for a reason that may have something to do with heat control. Then again does anyone have any real underhood temperature data both ways?
Leave it on
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Grandpa's toys-modded suspensions and a few other tweaks
'99 Prelude SS - A sweet song in motion SOLD
'89 CRX Si= SCCA/NASA/PDA ITA #99
'03 Dodge Dakota Club Cab (4.7L)-gonna tow
Thanks to KONI, KIRK Racing, Longacre, UPRacing, Summit, Racing Electronics and my crew.
i've never datalogged it both ways, but it must prevent some transfer of hot air from the exhaust manifold to the rest of the engine bay. your header gets damn hot. i'm sure honda put it there partly to keep heat down and away from the intake and partly to keep people from TOUCHING the header!
and yeah, it doesn't weigh much at all. leave it on.
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Originally posted by jc836 IT is a simply stamping that weighs nearly nothing and says "HOT" on it. It is there for a reason that may have something to do with heat control. Then again does anyone have any real underhood temperature data both ways?
Leave it on
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The heat shield is there to keep the exhaust hot enough so that the Cat can do it's work. The Cat likes hot exhaust and therefore will use this heat along with the platinum to convert the gases into harmless CO2 and water. And some other reductions.
Originally posted by Luder03 The heat shield is there to keep the exhaust hot enough so that the Cat can do it's work. The Cat likes hot exhaust and therefore will use this heat along with the platinum to convert the gases into harmless CO2 and water. And some other reductions.
I don't know about that claim.... I think the exhaust would be plenty hot for the cat to work with or without the heat cover.
well, i took it off cause my cousin said it weighed like 40 lbs. It weighed about 2 or 3. If I could go back in time, I would have left it on. Although it does kinda look like I got aftermarket headers, the rusty looking colors don't do it for me.
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'00 Prelude NX'd 13.71@102.83mph (Blown Engine, JDM replaced and sold)
'05 Nissan Altima 2.5S and how.
Originally posted by ZMonkey11 well, i took it off cause my cousin said it weighed like 40 lbs. It weighed about 2 or 3. If I could go back in time, I would have left it on. Although it does kinda look like I got aftermarket headers, the rusty looking colors don't do it for me.
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"AIDS is not just God's punishment for homosexuals; it is God's punishment for the society that tolerates homosexuals." R.I.P. Jerry Falwell.
ANyone thought of actually polishing their stock header?
I have a 2001 lude...so from what i hear the DC header will not do me any good sinc the gains wont be noticable. So i thought of just removing my stock header and polishing that SH/t A little sand paper a few hours of your time...some polish and BAm ...nice looking polished header. WHAT DO YOU ALL THINK ...is it a good idea
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If you want to take the cover off and still retain the the Low under hood temp then put some header wrap on the Header. That way you can also hide the Ugley rusting Header. Just a thought.
Originally posted by schwett lol. "if i could go back in time..."
you could just put it back on.
Yea schwett...I could...but its called the laziness factor...its factored in...and plus, if I do put it back on, I gotta buy another nut to hold the heat shield on. I lost 1, and only got 2 of them. I say...ARGH!
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-Andrew
'00 Prelude NX'd 13.71@102.83mph (Blown Engine, JDM replaced and sold)
'05 Nissan Altima 2.5S and how.
I don't know about that claim.... I think the exhaust would be plenty hot for the cat to work with or without the heat cover.
From what I know and learned in engineering, what I said is true. Not to mention the hotter the exhaust gases, flow will be increased with less back pressure since density is lesser.
a flimsy metal shield not in direct contact with the surface of the header won't really keep the header hot, at least not in any appreciable way. it will keep the heated air around the header from travelling in a particular direction. if honda was really concerned about keeping the exhaust gases hot, they'd have thermally wrapped the header. with or without that shield, the header will stay damn hot.
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Originally posted by Luder03
From what I know and learned in engineering, what I said is true. Not to mention the hotter the exhaust gases, flow will be increased with less back pressure since density is lesser.
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"AIDS is not just God's punishment for homosexuals; it is God's punishment for the society that tolerates homosexuals." R.I.P. Jerry Falwell.
Originally posted by schwett a flimsy metal shield not in direct contact with the surface of the header won't really keep the header hot, at least not in any appreciable way. it will keep the heated air around the header from travelling in a particular direction. if honda was really concerned about keeping the exhaust gases hot, they'd have thermally wrapped the header. with or without that shield, the header will stay damn hot.
The shield has this purpose and one of the purposes are what I have said. Old exhaust manifolds are made of heavy cast iron and they do not need a heat shield since it's a good heat retainer.
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