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B21 bored to 2.3 liters: ' turboable' ? 200 1979

posted by  pierre on  Fri Jul 11 19:37 CST 2003
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last visit: Fri Oct 10 10:49 CST 2014
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Good very early morning, friends...

Will a B21 block bored to 2.3 stand up to being turboed ?

Thanks and have a good Saturday...








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Test.... 200 1979

posted by  pierre on  Sat Jul 12 04:40 CST 2003
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last visit: Fri Oct 10 10:49 CST 2014
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B21 bored to 2.3 liters: ' turboable' ? 200 1979

posted by  Andrew in AL on  Sat Jul 12 02:31 CST 2003
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last visit: Fri Oct 24 06:17 CST 2014
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I wonder about this.

Seems that I have read that the cylinder bores are designed at the factory as 'elliptical' ?? - and that as the motor heats up - they expand/contract to the pistons for that perfect seal - or whatever.

Then again, I may be dreaming - or have dreamed this up. But if I did read that - I wonder how a local shop might get that same 'factory' spec ??

Just ?? 'wondering' ...and then again it may be something that I have read about B230 motors.

Andrew in AL
--
'91 940T (198K) , '94 940T (145K) , '92 745T (170K)








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B21 bored to 2.3 liters: ' turboable' ? 200 1979

uid 55's pic
posted by  john sargent on  Sat Jul 12 03:23 CST 2003
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last visit: Wed Oct 22 09:07 CST 2014
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I have never heard of elliptical cylinders in any engine, except one that is worn out. Some air cooled engines are manufactured with a choke in the cylinder bore. Since the cylinder is hotter near the top, and expands more at the top, the bore is manufactured with tighter clearances at the top of the stroke. This is to give uniform cylinder dimensions under operating conditions. This is not done on water cooled engines.
--
john








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B21 bored to 2.3 liters: ' turboable' ? 200 1979

posted by  Andrew in AL on  Sat Jul 12 07:11 CST 2003
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last visit: Fri Oct 24 06:17 CST 2014
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Appreciate that, John.

Must have been that spicy food I ate before I logged on.

Andrew in AL
--
'91 940T (198K) , '94 940T (145K) , '92 745T (170K)







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