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Old 09-20-2003, 02:42 AM   #1
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Engine Temp. Question

Ok I know there really isnt an average temp. for an engine to run at, seeing as not all engines are the same, but I have a question. I have a TOP TN12 S1 and I'm breaking it in. I've just got it going half throttle and its running at 260-270 degrees F. Now Im not sure if thats too hot but sounds hot to me. (And I'm only at half throttle.) Anyone have this engine and could give me an idea at what temp. it should be running around. Remember I'm still in the process of breaking it in. Ive also gotten mixed answers from people. Some have told me its okay cause its in the break in process and others that its too hot. So need some help/advice.

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Old 09-20-2003, 05:32 AM   #2
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well , a few questions for you to answer.

where are you located?

what is the weather like that you are running in?

is there some sort of airflow over the engine?

are you running it at 1/2 throttle or blipping it up to 1/2 throttle every once and a while?

When I first read it it sounded like it is on a break in bench but is it?

ok done for now

it does sound hot, how rich/lean are your needle settings
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Old 09-20-2003, 01:43 PM   #3
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And here are the answers:

Los Angeles and when i was running it was pretty cool outside. For airflow the body i was using has about half the front windshield cut (lined up with the engine), both side windows cut, and a big circle in the back too.
Im running it at 1/2 throttle and blipping it . And its off the bench and running on a surface.
And they told me not to touch the needles for the break in so i havent yet.

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Old 09-20-2003, 01:59 PM   #4
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i would say those are more like race temps then break in temps, i would definately richen it up and run cooler, maybe around 200-220 degrees with the body on.
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Old 09-20-2003, 02:28 PM   #5
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Never brake-in any engine with a body on, you want the most amount of airflow possible. For temps, I would go up to 220, no more than that.


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Old 09-20-2003, 02:37 PM   #6
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Yeah that was the first time with the body on. Been breaking it in very slowly.
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Old 09-23-2003, 09:54 AM   #7
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you might want to check your clutch. i was running my c-5, and it would constantly run around 275 degrees fahrenheit. i would richen it up, i would even run it at half throttle, and it still ran real hot. i popped open my clutch, and i saw the brass shim that the flywheel sits on had wore down. the slipping flywheel caused one of the clutch shoes to break where it connects on the posts. i'm assuming this caused the engine to over-rev and waste all the power the c-5 was creating.

you may or may not have the same problem, but it's worth checking out. if your needles are set right and your clutch is engaging correctly, your engine should maintain a relatively cool temperature.
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