[Fot] Question 1: Cosworth Piston Clearances

Bob rdavis4 at cfl.rr.com
Wed Jul 30 15:04:24 MDT 2008


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 at 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.   
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