red hot downpipe
The Power of 1.3
Joined: Aug 2001
Posts: 2,835
Likes: 0
From: Shrewsbury, Massachusetts
I've never seen mine get red, and I have the rest of the exhaust completely stock. The downpipe is aftermarket, but the cat and cat-back are stock.
For those that have glowing dps, are your temp gauges reading unusually high? Do any of you have a way of monitoring intake temps (just to see if ambient engine bay temps are significantly higher than those of us without glowing pipes.)?
For those that have glowing dps, are your temp gauges reading unusually high? Do any of you have a way of monitoring intake temps (just to see if ambient engine bay temps are significantly higher than those of us without glowing pipes.)?
PV = nRT
Joined: Jan 2003
Posts: 2,250
Likes: 0
From: New Zealand (was California)
After a hard run I definitely see glowing on the downpipe (mild steel) where it meets the exhaust manifold.
Totally common. However glowing right way without putting the car through hard duty is caused for concern.
Totally common. However glowing right way without putting the car through hard duty is caused for concern.
Trending Topics
i cant say for the DP cause its wrapped.... but after putting on the DP i noticed my turbo exhaust manifold was completely glowing after a long run!!!! this seems bad to me...... anyone else get this? my manifold already has a few nice cracks in it and im affraid this will cause many more
0-rotor-0-turbo-0-fd
Joined: Sep 2002
Posts: 1,640
Likes: 0
From: NYC
Originally posted by 911GT2
For those that have glowing dps, are your temp gauges reading unusually high? Do any of you have a way of monitoring intake temps (just to see if ambient engine bay temps are significantly higher than those of us without glowing pipes.)?
For those that have glowing dps, are your temp gauges reading unusually high? Do any of you have a way of monitoring intake temps (just to see if ambient engine bay temps are significantly higher than those of us without glowing pipes.)?
I'm thinking of gettind some exhaust wrap for the DP to reduce at least a little the engine bay temps.
I don't have a way to check intake temps so I wouldn't know about it.
The Light is my strength.
Joined: Jul 2003
Posts: 535
Likes: 0
From: Ferndale, MI
Most people seem to think that it's normal. Mine starts glowing a couple minutes after starting the car, and then disappears completely after the car is completely warmed up and the idle settles around 800 RPM. (Usually about 5-10 minutes in this cold weather)
From what I understand (and have been told by a reputable RX-7 mechanic), the car runs very rich at startup. This causes the pipe to heat up this hot, and once the mixture stabilizes the glowing disappears.
But there doesn't seem to be any "official" answer to this.
From what I understand (and have been told by a reputable RX-7 mechanic), the car runs very rich at startup. This causes the pipe to heat up this hot, and once the mixture stabilizes the glowing disappears.
But there doesn't seem to be any "official" answer to this.
0-rotor-0-turbo-0-fd
Joined: Sep 2002
Posts: 1,640
Likes: 0
From: NYC
Originally posted by EdwardNorth
Most people seem to think that it's normal. Mine starts glowing a couple minutes after starting the car, and then disappears completely after the car is completely warmed up and the idle settles around 800 RPM. (Usually about 5-10 minutes in this cold weather)
From what I understand (and have been told by a reputable RX-7 mechanic), the car runs very rich at startup. This causes the pipe to heat up this hot, and once the mixture stabilizes the glowing disappears.
But there doesn't seem to be any "official" answer to this.
Most people seem to think that it's normal. Mine starts glowing a couple minutes after starting the car, and then disappears completely after the car is completely warmed up and the idle settles around 800 RPM. (Usually about 5-10 minutes in this cold weather)
From what I understand (and have been told by a reputable RX-7 mechanic), the car runs very rich at startup. This causes the pipe to heat up this hot, and once the mixture stabilizes the glowing disappears.
But there doesn't seem to be any "official" answer to this.
You have a DP (as your sig. says) so take your car for a nice hard run at night and then just pull over where there is not much light around, open the hood and look for yourself, that sucka will be red hot, that is very normal for a turbo charged rotaries.
don't race, don't need to
Joined: Oct 2002
Posts: 1,292
Likes: 1
From: Tri-Cities, WA
And from this corner..
I too have experienced almost white hot glowing DP on cold startup, which goes away once warmed to operating temp. Lean runs hotter UNLESS you pour enough fuel in to cause combustion AFTER the exhaust ports and turbos (betcha timing get's played with too). As I understand it, this is done to heat the pre-cat quickly on startup, part of the so-called accelerated warm up, so that it will function as it's supposed too, namely to clean the cold start emissions. Any confirms?
I too have experienced almost white hot glowing DP on cold startup, which goes away once warmed to operating temp. Lean runs hotter UNLESS you pour enough fuel in to cause combustion AFTER the exhaust ports and turbos (betcha timing get's played with too). As I understand it, this is done to heat the pre-cat quickly on startup, part of the so-called accelerated warm up, so that it will function as it's supposed too, namely to clean the cold start emissions. Any confirms?
I AM A THIEF!! READ THE FEEDBACK SECTION!
Joined: Aug 2002
Posts: 86
Likes: 0
From: Miami, FL
I am not 100% sure on this, but someone told me that used to happen to their turbo and dp and it turned out to be thatvtheir cat was clogged. Check that out, won't hurt.
