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Home > Help Needed / General Tech Chat > What is the max overbore on a linered block?

turbodave16v
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Not for me - but a turbo owner stateside...
It is a near-stock motor, so no worries on huge power outputs. The only 'OE' pistons are of course +040 - I just don't recall if the stock liners will be happy at +040. Anyone got experience of this?

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Tom Fenton
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+20 is certainly OK as my block is at +20, no experience of +40 though.


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On 28th Nov, 2016 Rob Gavin said:
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BENROSS

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dave, there is a thread on this some time back, i recall there was no issues with
+ 40" But that was the limit!

i think it was Bri, AKA Dangerouse






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Dave,

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Build thread - http://www.turbominis.co.uk/forums/index.php?p=vt&tid=7483

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Rob H

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I expect the biggest problem will be that from the factory the liners are not centrally bored or at least the ones in my old engine weren't (I'm guessing they have a machine that does all four in one go) so on side of the liner thens to have more meat in it that the other. So the liners may need replacing of you may need to offset bore the block to recenter the bores in the liners. I hope that makes sense.

Edited by Rob H on 6th Feb, 2009.

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James_H

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On 6th Feb, 2009 Rob H said:
I expect the biggest problem will be that from the factory the liners are not centrally bored or at least the ones in my old engine weren't (I'm guessing they have a machine that does all four in one go) so on side of the liner thens to have more meat in it that the other. So the liners may need replacing of you may need to offset bore the block to recenter the bores in the liners. I how that makes sense.


the only bit that didnt make sense were the last 5 words. *wink*


Rob H

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better now?

Isambard Kingdom Brunel said:
Nothing is impossible if you are an Engineer


James_H

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haha well we'll will have to see if vegard has anything to say before you get the gold seal of approval.

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