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Author Topic: Boring...........  (Read 1167 times)

Offline dan7

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Boring...........
« on: 05 October 2009, 19:11 »
My mate bought a block from E38 for his digi. The guy claimed it was a 1.9 from TSR. I lent my mate my digital vernier to check the bore and he tells me it's 82.8mm. The standard bore size is 81mm. Would this oversize make it a 1.9?  :huh:
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Offline molegti

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Re: Boring...........
« Reply #1 on: 05 October 2009, 21:40 »
based on some rough maths (percentage increase on bore diametre I come out at about 1840 cc based on the info youve given. If the crank was changed for one with a longer through the capacity would be increased further so you cannot completely rely on bore size.
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Offline Wayne

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Re: Boring...........
« Reply #2 on: 05 October 2009, 23:39 »
All 1.9's built by TSR used 82.5 or 82.8 overbore but were classed as 1.9's, if you want to confirm 100% it is a TSR engine you should find extra markings around the engine number area.
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Offline l333

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Re: Boring...........
« Reply #3 on: 06 October 2009, 08:04 »
or you could just measure the stroke length and bore size and work it out properly
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Offline Wayne

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Re: Boring...........
« Reply #4 on: 06 October 2009, 08:55 »
TSR 1.9 is or should be a standard crank.
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Offline jezza16v

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Re: Boring...........
« Reply #5 on: 06 October 2009, 12:04 »
Standard cap = 1781cc x 1.05 = 1861cc. (82.8 squared/81 squared = 1.05). i.e. near enough 1900cc.   :wink:
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