Re: Snapey's 1935 Racing Biposto

Posted by Ozstatman On 2011/3/30 3:06:17
Quote:
Snapey wrote:So finally, after many, many months, I have organised the shed to accommodate the new Packard project. I have a clear floor and new benches so next on the list will be a trip to Wades Workshop to pick up the rolling chassis that I arranged to 'acquire' from him over a year ago now........

Pistons, on the other hand, are a different matter.....Also looking at the bores I think they will have to be taken out at least 40-60thou to clean up properly.....

Given that this will be a 'performance' engine using period technology, then boring the block out for larger capacity would be one of our first considerations, so the next step is to find some pistons to suit. With a standard bore of 3.25" (out to 3.31" at 60 over) and with a compression height of (from memory?) roughly 2.125" this is not going to be a very easy task - although I am willing to consider a bore size out to near 3.50". Of course this might be pushing my luck a little and I can't really afford to machine the engine just to then sleeve it back down to standard.......
Matt,

Good to hear things are progressing and that the rolling chassis will have a new home soon.

Concerning boring a 282 block, usually the maximum recommended oversize is 60thou. Although my '41 was out to about 90thou, a combination of 75thou plus wear, it was sleeved back to std when rebuilt. Can't see 3.5" bore as possible although if you do manage to I'd like to see that!

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