CHT temps, individual cylinder differences? |
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CHT temps, individual cylinder differences? |
falcor75 |
Apr 12 2018, 10:50 PM
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#1
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia |
For those of you that are running 4 CHT sensors under the plugs, what differences do you see between the cylinders?
Whats your typical temps for each cylinder with: A: Engine warmed up sitting at idle for a minute or two. B: Engine warmed up, cruising at 50-55 mph in fifth gear. |
Elliot Cannon |
Apr 14 2018, 03:46 PM
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#2
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None |
Coming home from Rt. 66 a number of years ago, I was driving up a very VERY long up hill stretch west of needles into about a 50 mph wind. The throttle wouldn't answer to accelerate and when I looked at the head temp. it was way over 400 degrees. Way over! I pulled over, let it cool, drove from then on in 4th gear and about 60-65 mph. The engine temp. cooled down nicely, to the usual 325-350 and stayed that way till I got on the other side of the mountain and then resumed in 5th gear. I should mention that when I stopped and pulled over to let it cool, I almost couldn't open the door to get out, the wind was so strong.
When the cyl. head temps go up, drop a gear, the higher rpm's mean the engine is working less hard and the fan speed also increases. Thanks to Joe Sharp for the advice. (IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/smoke.gif) (IMG:style_emoticons/default/driving.gif) |
worn |
Apr 14 2018, 05:33 PM
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#3
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can't remember Group: Members Posts: 3,149 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
Coming home from Rt. 66 a number of years ago, I was driving up a very VERY long up hill stretch west of needles into about a 50 mph wind. The throttle wouldn't answer to accelerate and when I looked at the head temp. it was way over 400 degrees. Way over! I pulled over, let it cool, drove from then on in 4th gear and about 60-65 mph. The engine temp. cooled down nicely, to the usual 325-350 and stayed that way till I got on the other side of the mountain and then resumed in 5th gear. I should mention that when I stopped and pulled over to let it cool, I almost couldn't open the door to get out, the wind was so strong. When the cyl. head temps go up, drop a gear, the higher rpm's mean the engine is working less hard and the fan speed also increases. Thanks to Joe Sharp for the advice. (IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/smoke.gif) (IMG:style_emoticons/default/driving.gif) I built a 2056 with too much compression and a non-stock cam. Rebuilt the manifold pressure sensor and have to run richer than I want to in order to keep below 400. My experience with fourth gear hasn’t been positive. Louder, but not much cooler. Excellent motivation for a six |
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