Moorron
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| posted on 21/10/07 at 08:45 PM |
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material type for barrel spacer (to lower cr)?
Nearly done with the turbo conversion but i also took apart the spare engine to 'have a go' so if the cars engine needs fixing im
familular with its build.
I took off the below barrel gasket so i can draw it up and get a 0.8 or 1mm spacer laser cut to lower the compression ratio. But what material should
i seek for to make it from?
Is normal aluminium sheet (ah14) going to be ok? or should i hunt for some copper. This isnt a head gasket, but a below piston gasket.
ps the original one iis .3mm thick.
[Edited on 21/10/07 by Moorron]
Sorry about my spelling, im an engineer and only work in numbers.
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rusty nuts
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| posted on 21/10/07 at 08:48 PM |
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Would have thought that a barrel base spacer would not be under any pressure like a head gasket so as long as the spacer was flat and even thickness
it would be OK . I stand to be corrected though.
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nick205
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| posted on 21/10/07 at 09:08 PM |
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I don't know much about bike engines, but does the "barrel" you refer to act as a dry or wet liner in the alloy engine casing?
i.e. does the spacer/hasket your designing have to seal the base of the barrel to prevent engine coolant leaking into the crank case?
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Volvorsport
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| posted on 21/10/07 at 10:18 PM |
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there will be some pressure in the crankcase , use a liquid gasket like volvo do for there intermediate section on 5 cyls .
and you should really be considering lower CR pistons so that you keep some squish in that combustion chamber .
www.dbsmotorsport.co.uk
getting dirty under a bus
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garage19
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| posted on 22/10/07 at 08:49 AM |
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Why not post the question on
http://www.technical-forum.com/bike-turbo
There are some issues you need to think about when choosing a material and i am sure you will get the answers you need on there.
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Phil.J
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| posted on 22/10/07 at 12:38 PM |
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I've used aluminium on mine with no problems for years.
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