10-08-2002, 09:41 PM
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Senior Club Cobra Member
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Join Date: Jun 1999
Location: Fallbrook, CA USA,
CA
Cobra Make, Engine: Porsche 928 S4
Posts: 739
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Not Ranked
Hi Folks,
On sleeved blocks.
We used to sleeve all of the 109E ford blocks. (Cosworth BDD) These were offset bored as well. We picked up 12% torque with offsetting the bores.
All of the F5000 Chevy blocks were sleeved. Traco were the first to do this due to failures with un-sleeved units.
There is nothing wrong with a sleeved block.
Matter of fact, all current F-1 engines are sleeved blocks. (Note: they are sleeved in some very trick ways. read Racecar engineering mag for details.)
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