From one of my old 1980s Car Boy magazine article compilation books.
3344cc using L28 block, 83mm crank stroke and double-stepped liners with 92.5mm bore:
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92.5 is quite something.
From one of my old 1980s Car Boy magazine article compilation books.
3344cc using L28 block, 83mm crank stroke and double-stepped liners with 92.5mm bore:
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Having the exact same number of atoms would be hard; they'll be within a gramme or so.If you have to wet and dry the edges of the pistons then how can the weights be matched?
Having the exact same number of atoms would be hard; they'll be within a gramme or so.
Taking the edges off, I expect I'll be removing maybe 0.1g. And for comparison, the rods out of my old L24 varied between 735 and 743g. (actually one was 712, but it was a mismatched replacement).
I'll try to remember when I get them back.So here’s a challenge: weigh each one before and after, let’s see what the reality of it would be. It would be interesting to know.
The cylinder walls on Alan’s photo look mighty thin. I’m on the phone so can’t zoom in enough to read the widths + being the wrong side of 25, my eyes are getting worse! [emoji848]
I'll try to remember when I get them back.
I can't read them, but I expect the calipers say 3.5mm.
96 - (2 *(92.5/2)) = 3.5 was my calculation.I reckon 2.25mm
I tried to read the gauge.96 - (2 *(92.5/2)) = 3.5 was my calculation.
how does yours go Rob?
Having the exact same number of atoms would be hard; they'll be within a gramme or so.
Taking the edges off, I expect I'll be removing maybe 0.1g. And for comparison, the rods out of my old L24 varied between 735 and 743g. (actually one was 712, but it was a mismatched replacement).
The cylinder walls on Alan’s photo look mighty thin. I’m on the phone so can’t zoom in enough to read the widths + being the wrong side of 25, my eyes are getting worse!
I can't read them, but I expect the calipers say 3.5mm.
I reckon 2.25mm
96 - (2 *(92.5/2)) = 3.5 was my calculation.
how does yours go Rob?
I tried to read the gauge.
The article mentions offset-boring some of the cylinders to mitigate differences in support for the liners in each 'hole'. There's differing amounts of metal left in each cylinder after boring, so they shuffled them about a little to suit. Therefore I'd expect different measurements for the gap between each bore. Not much left for the head gasket to sit on...!
I've seen this offset cylinder bore shuffling done on other types of engines too.
So, coming from a point of utter ignorance on this topic: how does that work with the crank? Are they also using an offset crank of sorts?
So, coming from a point of utter ignorance on this topic: how does that work with the crank? Are they also using an offset crank of sorts?
What did the gauge read Alan?
No. This is about shuffling bore centres along the centre line of the crankshaft, and the small differences are mitigated by the connecting rods finding their own centres on the crank pins. There's enough clearance between pistons and piston pins, and conrods and crank pins, to allow this.
Don't know. Can't see the scale!
The bores in the standard diesel gasket will be about 5mm too small, and I don't think there are any after market gaskets for it.Use a diesel head gasket maybe?