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Model specific boards => Golf mk2 => Topic started by: dan7 on 05 October 2009, 19:11

Title: Boring...........
Post by: dan7 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:

Title: Re: Boring...........
Post by: molegti 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.

Title: Re: Boring...........
Post by: Wayne 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.

Title: Re: Boring...........
Post by: l333 on 06 October 2009, 08:04

or you could just measure the stroke length and bore size and work it out properly

Title: Re: Boring...........
Post by: Wayne on 06 October 2009, 08:55

TSR 1.9 is or should be a standard crank.

Title: Re: Boring...........
Post by: jezza16v 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: