Turbo-ing. How do they do that?

Started by Chimjunkie, February 21, 2015, 14:00

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Chimjunkie

February 21, 2015, 14:00 Last Edit: January 1, 1970, 01:00 by Guest
Just curious about what is involved in the 1ZZ turbo conversion? Being an NA engine surely the compression ratio is too high for forced induction. So what is done??

1979scotte

#1
February 21, 2015, 14:46 Last Edit: January 1, 1970, 01:00 by Guest
To the compression ratio?  Nowt as far as i am aware.
Decent power is obtainable without modification of the internals.
I suppose it's just less efficient.
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Lee H

#2
February 21, 2015, 14:59 Last Edit: January 1, 1970, 01:00 by Guest
Converted NA cars run a lot less boost than a normal turbo car in order to avoid detonation due to the high comp ratio.
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maybeturbo

#3
February 21, 2015, 16:50 Last Edit: January 1, 1970, 01:00 by Guest
And less ignition advance.

Chimjunkie

#4
February 21, 2015, 18:07 Last Edit: January 1, 1970, 01:00 by Guest
Oh really! Thought some kind of head gasket magicery may have been involved. But then The capacity would be changed...

1979scotte

#5
February 21, 2015, 18:14 Last Edit: January 1, 1970, 01:00 by Guest
I keep dreaming about a set of low comp pistons and tougher connecting rods for mine.
First they came for the socialists, and I did not speak out—because I was not a socialist.
Then they came for the Jews, and I did not speak out—because I was not a Jew.
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men3cac

#6
February 21, 2015, 19:04 Last Edit: January 1, 1970, 01:00 by Guest
Quote from: "Chimjunkie"Oh really! Thought some kind of head gasket magicery may have been involved. But then The capacity would be changed...

Capacity doesn't change- it's 'swept volume' that's quoted, which isn't affected by head gasket trickery

Chimjunkie

#7
February 21, 2015, 20:49 Last Edit: January 1, 1970, 01:00 by Guest
Quote from: "men3cac"
Quote from: "Chimjunkie"Oh really! Thought some kind of head gasket magicery may have been involved. But then The capacity would be changed...

Capacity doesn't change- it's 'swept volume' that's quoted, which isn't affected by head gasket trickery

Thats interesting.

maybeturbo

#8
February 21, 2015, 23:30 Last Edit: January 1, 1970, 01:00 by Guest
But spacing the head would affect compression ratio. Which would help/make it easier, and has probably been done before, but I don't know it's been done, just guessing.

markiii

#9
February 22, 2015, 00:44 Last Edit: January 1, 1970, 01:00 by Guest
the only reason to lower the compression ratio is to raise the boost, and since as is it can make enough power to snap the rods and mince the gearbox its fairly pointless
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Anonymous

#10
February 22, 2015, 09:34 Last Edit: January 1, 1970, 01:00 by Guest
head gasket thickness increase is normally max at about half a ratio, so as mark put it pointless for the money
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