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Author Topic: 50kpa on idle  (Read 6893 times)

Offline Senchiro

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50kpa on idle
« on: April 26, 2012, 04:57:03 pm »
Hello.I have a m20b20 engine with a charger.What can i do to make good kpa? 50 is to many(( 800rpm, 20deg on idle.If without charger, it is 46kpa.
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Offline GintsK

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Re: 50kpa on idle
« Reply #1 on: April 26, 2012, 08:22:33 pm »
What is wrong with 50Kpa?  ???
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Offline Senchiro

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Re: 50kpa on idle
« Reply #2 on: April 27, 2012, 04:40:47 am »
It is not normal pressure on idle i think? normal is near 28-30kpa?
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Offline GintsK

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Re: 50kpa on idle
« Reply #3 on: April 27, 2012, 06:11:18 am »
It depends from cam. Narrow cams with zero overlap gives lowest absolute pressure. With overlap increase pressure rises. In some cases it can be in 90...100kpa range.

Gints
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Offline Senchiro

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Re: 50kpa on idle
« Reply #4 on: April 27, 2012, 07:47:18 am »
cam is stock )) may it be from changed  degree of compression? it was 9.4, now is 8.0
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Offline Jamo

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Re: 50kpa on idle
« Reply #5 on: April 27, 2012, 10:13:16 am »
I would say that is normal pressure
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Offline mattias

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Re: 50kpa on idle
« Reply #6 on: April 27, 2012, 05:02:14 pm »
50 is perfectly normal for a stock M20. It will loose some from the lower c/r.
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