UK Karting - Notice Board (2-Stroke Karting) : Re: Alfano to BT82 and running in

Notice Board (2-Stroke Karting)

Re: Alfano to BT82 and running in
Posted by 'Liam' on 29 Jul 2012 @ 21:56

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LiamJoined: March 2010
Total Posts: 1
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Takes a bit of getting your head around I know, because I've had to do it myself, and struggled at first. Cylinder pressure is experienced much like hydrostatic pressure on every face exposed to it. As well as the top face of the ring being exposed to cylinder pressure, there is a small clearance between the top face of the ring and the upper ring land. There is a big clearance behind the ring, which tends (I'm told) to fill with cylinder pressure, forcing the ring out against the bore. On a BT82 (and a modern F1 engine I believe) the ring is actually L-shaped, so the gap that sees pressure forcing the ring out against the bore is even easier to see.

I've got a couple of mates at work that spend half their lives reseaching this, and what happens to the oil film thickness as the cylinder pressure increases. I'll check with them that I've got my facts basically correct, but I'm pretty sure that's how they are thought to work. It's certainly true that if you use insufficient throttle running-in, the bores tend to glaze.

Liam

Message Thread:

Alfano to BT82 and running in by 'GR2' (27 Jul 2012 @ 16:03)

Re: Alfano to BT82 and running in by 'DonaldJTKM4S' (28 Jul 2012 @ 11:19)

Re: Alfano to BT82 and running in by 'Liam' (28 Jul 2012 @ 12:13)

Re: Alfano to BT82 and running in by 'Hi99' (28 Jul 2012 @ 20:19)

Re: Alfano to BT82 and running in by 'DMR' (29 Jul 2012 @ 8:51)

Re: Alfano to BT82 and running in by 'Traxtar' (29 Jul 2012 @ 15:21)

Re: Alfano to BT82 and running in by 'Liam' (29 Jul 2012 @ 17:22)

Re: Alfano to BT82 and running in by 'Traxtar' (29 Jul 2012 @ 18:30)

Re: Alfano to BT82 and running in by 'Liam' (29 Jul 2012 @ 18:59)

Re: Alfano to BT82 and running in by 'Farrang' (29 Jul 2012 @ 20:58)

Re: Alfano to BT82 and running in by 'Hi99' (29 Jul 2012 @ 20:11)

Re: Alfano to BT82 and running in by 'Liam' (29 Jul 2012 @ 21:08)

Re: Alfano to BT82 and running in by 'Traxtar' (29 Jul 2012 @ 21:12)

Re: Alfano to BT82 and running in by 'Traxtar' (29 Jul 2012 @ 21:26)

Re: Alfano to BT82 and running in by 'Hi99' (29 Jul 2012 @ 21:41)

Re: Alfano to BT82 and running in by 'Liam' << You are here!

Re: Alfano to BT82 and running in by 'Hi99' (29 Jul 2012 @ 22:44)

Re: Alfano to BT82 and running in by 'DMR' (29 Jul 2012 @ 23:52)

Re: Alfano to BT82 and running in by 'Liam' (30 Jul 2012 @ 0:16)

Re: Alfano to BT82 and running in by 'd-i-y71' (30 Jul 2012 @ 11:55)

Re: Alfano to BT82 and running in by 'westside' (01 Aug 2012 @ 9:19)

Re: Alfano to BT82 and running in by 'DMR' (29 Jul 2012 @ 21:47)

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