a late 260 block bored to 4.00" (no mail please, I've already heard
that it 'can't be done'....)
'Performance Tuning the Sunbeam Tiger' by Gordon Chittenden, says you
can bore out a late 260 block to 289 specs since these were in reality
289 blocks that Ford Industrial made to meet Rootes contractual
obligations. According to Mr. Chittenden it is possible, and I am
willing to go on the record as believing you, that you bored out your
260 block to 4.00".
I know you don't want any more email on the subject but another
controversy can't hurt.
Jeff
______________________________ Reply Separator _________________________________
Subject: Re: Steam holes
Author: Spook37211@aol.com at INTERNET
Date: 9/10/97 2:31 PM
In a message dated 97-09-09 21:40:36 EDT, anitabrt@mindspring.com writes:
<< I di >>
>Do these 'steam' holes correspond with the lozenge shaped holes on the
intake
>side of the head? Are they the equivalent of the small hole just over the
>bore in the 289-302 block?
>Ray
Small 1/8" holes similar to the 289 steam holes. Locate holes locations
with
new 351W head gasket as the templet.
Jim Barrett Tiger II 351C and others
>
>>
Jim,
At one time, Shelby as well as Ford Muscleparts recommended plugging the
small holes in the 289 block for coolant circulation control at higher RPM's.
My block is a later 302, so I suspect that the reason I noticed no difference
is that the block holes were apparently common after late 75 or so.
I must say that I don't think that this is really a needed modification,
though, since I ran the same heads on a 5 bolt 289 block as well as a late
260 block bored to 4.00" (no mail please, I've already heard that it 'can't
be done'....) with no apparent effect on cooling.
Anybody else do the same thing?
Regards, Ray
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