It's probably not just forged aluminum, it probably has quite a bit of
silicon. Not as much as Japanese pistons, but some. I'd set it up on
the loose side of whatever Venolia recommends.
On Jul 30, 2008, at 2:04 PM, Bob wrote:
> Testing my memory, but I recall using Cosworths in a Datsun 2000. Got
> them from a fella in Virginia that passed away several years ago. He
> supplied alot of performance parts for Triumphs and Datsun. Maybe some
> else can remember his name and business name. I recall the recommended
> piston clearance to be .004 - .007. Don't know the piston material
> other
> than forged aluminum.
>
> Bob
>
> Scott Cypher wrote:
>> I have a set of cosworth piston's I'm considering using in my spit,
>> but I can't seem to find supporting information about the alloy used
>> or the typical clearances recommended. I know Venolia and J&E type
>> information, but I don't know how to determine what Bore I need to
>> build. If anyone has used cosworth's before, and can advise, I'd
>> appreciate it..
>>
>> Thanks
>>
>> -Scott Cypher
>> spitfireracer@xsmail.com
>> SCCA #57 HP Spitfire 1500 #362573
>> Reading, PA
>> http://gallery.mac.com/srcypher
>>
>> 1971 Spit MkIV/1500 RaceCar
>> 1971 TR6 TBD
>> 1976 TR7 Street
>> 1968 GT6 Vintage
>>
>> "I'm so excited I can barely sit still or hold a thought in my head.
>> Its the excitement only a free man can feel. A free man at the start
>> of a long journey, whose conclusion is uncertain"
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Bill Babcock
Babcock & Jenkins
Billb@bnj.com
503.936.7660
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