Difference in exhaust heat - why??
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Joined: Jun 2007
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From: Mosjoen
Difference in exhaust heat - why??
Hello.
After starting my vette, 78 L-82, I held my hand in front of the exhaust pipes after ca. 20 min. The left pipe was much warmer than the left. Checked the riser, it had opened the valve. Since I still got an Y-pipe I don´t understand this, thought the temp should be the same.
Any ideas??
After starting my vette, 78 L-82, I held my hand in front of the exhaust pipes after ca. 20 min. The left pipe was much warmer than the left. Checked the riser, it had opened the valve. Since I still got an Y-pipe I don´t understand this, thought the temp should be the same.
Any ideas??
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Joined: Jun 2007
Posts: 52
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From: Mosjoen
Exhaust confusion
Hello.
After starting my vette, 78 L-82, I held my hand in front of the exhaust pipes after ca. 20 min. The left pipe was much warmer than the left. Checked the riser, it had opened the valve. Since I still got an Y-pipe I don´t understand this, thought the temp should be the same.
Any ideas??
After starting my vette, 78 L-82, I held my hand in front of the exhaust pipes after ca. 20 min. The left pipe was much warmer than the left. Checked the riser, it had opened the valve. Since I still got an Y-pipe I don´t understand this, thought the temp should be the same.
Any ideas??
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Aint there, dunno, BUT....the heat riser is typically on the pass side of the GM engines, so forces gasses over the top through the intake mani to warm the carb/induction....and so when that pulls off with engine temp, actually a bi metal spring on the pass side flapper...outside where you can see it....it will of course make the pass side run cooler, not to mention even when open the flow is blocked a bit but it more or less equalizes through the up/over passage....
Race Director
Joined: Apr 2003
Posts: 19,352
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From: Tampa, Florida
Looking at an exhaust diagram it appears the right pipe has a more restrictive curves thus diverting more exhaust gases out the left pipe....
click pics to enlarge....
http://www.parts123.com/parts123/yb....Z5Z5Z50000050G
click pics to enlarge....
http://www.parts123.com/parts123/yb....Z5Z5Z50000050G
Thread Starter
Advanced
Joined: Jun 2007
Posts: 52
Likes: 0
From: Mosjoen
Looking at an exhaust diagram it appears the right pipe has a more restrictive curves thus diverting more exhaust gases out the left pipe....
click pics to enlarge....
http://www.parts123.com/parts123/yb....Z5Z5Z50000050G
click pics to enlarge....
http://www.parts123.com/parts123/yb....Z5Z5Z50000050G
