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Old 08-01-2008, 02:05 AM   #1
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Default V-Spec not reaching temp

So im a good ways into the break-in of my V-Spec(blue head). Every break-in guide i read says to get above 200F as quickly as possible to avoid engine wear. Now i can achieve 200F - 230F quite easily if i rap the heat sink and preheat but as soon as i unwrap the heat sink the temp drops to 150F-180F and its very difficult to get it back up, i can just hit 200F but leaning it out and doing high speed runs... if i lean it any more its going to run well ...lean.

The fuel im running is high quality, probably the best we have here in aus(MMs HB 444), so that's probably contributing to the low temps and the ambient temp is around 70F-80F.

Id love to have these kind of temps on a broken in engine but it kina sucks on one im trying to finish breaking in.

Big thanks for any advice.
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Old 08-01-2008, 03:32 AM   #2
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I put tin foil around the head and then drive it up and down the street. I'll do 2 runs up and down the street, then come in and check temp to make sure it's ok. After 1/2 gallon I'll take it off and start race tunning it.
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Old 08-01-2008, 05:25 AM   #3
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I keep the foil on the head until break in is finished, that keeps the temps up.
How many tanks have you done so far?
Once the break in is finished the temps should come down anyway.
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Old 08-01-2008, 09:03 AM   #4
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what brand of temp gun are you using ? most hobby grade temp guns are terribly inacurate, so its possible your motor is well past 200 but your gun is reading wrong....
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Old 08-01-2008, 05:44 PM   #5
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Im also having this same problem, my LRP .28 spec3s have never gotten higher than about 180F, normal running temp is like 140-160.

I could also lean it out more, but im scared it will be too lean. I am not producing much smoke when I run at half throttle.
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Old 08-02-2008, 07:52 PM   #6
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where are you taking the temp reading from? The will read 10-20° hotter than the top of the colling head....
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