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CC increase for car with 50" overbore?

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Old Feb 18, 2006 | 07:14 PM
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Question CC increase for car with 50" overbore?

gunna overbore my car but not sure by how much.

just wondering what my cc would increase by if it had a 50thou overbore when i get the forged pistons in there.
anyone know? specs here http://www.gt6.com/triumph/gt6_mk2.aspx
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Old Feb 18, 2006 | 07:28 PM
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Why are you overboring the car ??

Can this be done ??

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Old Feb 18, 2006 | 07:32 PM
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im over boring it as the **** who claimed to have done it in the recon have probably galzed the bores and im putting in forged pistons once they and everyhing has been balanced.

I can take it up to 2.3ltr.
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Old Feb 18, 2006 | 07:36 PM
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I take it you mean the engine then ??
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Old Feb 18, 2006 | 07:39 PM
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I reckon it'd go to ~2065cc

Incidentally, I used to have Triumph GT6 pistons in my old A series powered Mini.
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Old Feb 18, 2006 | 07:46 PM
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Hmmmm, sounds good. Might go even more!take it up to 2.1
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Old Feb 18, 2006 | 07:51 PM
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Wouldnt a transplant from a 200 SX or something be easier ?
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Old Feb 18, 2006 | 11:03 PM
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Originally Posted by hutton_d
When you say overbore by 50 thoug .... do you mean 50 thousandths of a 'mm' or of an inch? The spec. page you gave gives the bore/stroke in mm but when people say '50 thou' they usually mean 50/1000 of an inch.

Anhow, when you've figured that out the formula for capacity is:

(bore/2) x (bore/2) x pi x stroke x number of cylinders.

Or, to put it another way: half-bore-squared x pi x length x num. cylinders

(pi is c. 3.14159 ...)

Enjoy the calcs!

Dave
I worked it out originally in cubic inches and converted, but doing the calcs in mm and assuming 50 thou is 1.27mm it ends up as 2067cc
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Old Feb 18, 2006 | 11:09 PM
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Pleeeeeeaze can a nice mod fix the title?
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Old Feb 19, 2006 | 10:39 AM
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Yeah, a 50" overbore would take it 650 litres
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Old Feb 20, 2006 | 12:26 AM
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200sx transplant ruins the moment when you blow past someone and then they found out its got a 32year old engine in it
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Old Feb 20, 2006 | 08:09 AM
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Why not just go with the 2500 engine?
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