Bob,
As I recall, the industrial Tiger "260" was not the same block as the
production passenger car "260" (see freeze plug count). And the casting
method of the "289" differed in that some cylinders were "siamesed" to
allow wall thickness for the bigger bore.
___
Steve Laifman
Editor - TigersUnited.com
Bob wrote:
> Several years ago I had my original tiger 260 block bored to the 289 bore
> size. The engine shop did not want to do this, and told me there would be
> nothing left once it was done. Obviously there was sufficient material to
> bore the engine, but then I was concerned about cylinder wall thickness. I
> did not have access to a sonic checker. Measuring in the water jacket
> between the cylinders, it looked like the remaining cylinder walls *might*
> have been 100 to 120 thousandths. Supposedly the thrust sides of the
> cylinders are thicker, but everything is suspect due to core shift unless
> you can sonic check it. In the end, I bought a 5 bolt 289 block and went
> to .030 over 289 pistons. I still have the machined 260 block in my
> garage, but why I am not sure.
>
>
>
> Bob Burruss
>
> 66 Tiger Mk1A #382000782
>
>
>
>> All,
>>
>> I am looking for anyone's/everyone's experience on rebuilding the original
>>
> Ford 260 engine.
>
>
>
>
>> Specifically, I want to know how big an over-bore those Ford Industrial
>>
> engine blocks can tolerate. I have heard anecdotal stories of thin walls
>
>> causing overheating on over-bores over 0.030", but I have also been told
>>
> these blocks are beefier and can go .060" or .080" over. I am NOT
>
>> considering taking it out to the full 4.000" bore of the 289/302.
>>
>
>
>
>
>> I am working on a project which, if it proves feasible, will be of great
>>
> interest to many Tiger owners wishing to keep their original engine.
>
>
>
>
>> Thanks,
>>
>
>
>
>
>> Bugz
>>
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