Lots of years ago NHRA tech inspectors had a device that screwed
into an engine's spark plug hole and measured displacement
by putting a fluid in the cylinder at BTC, hand cranking the
engine to TDC and measuring how much fluid was pushed back into
the device. Maybe such a tool still exists??
-----Original Message-----
From: New Mexico Jim [mailto:ADvent@thuntek.net]
Sent: Friday, August 04, 2000 5:18 PM
To: Grant Galbraith
Cc: Allen Jones; oletrucks
Subject: Re: [oletrucks] 235 or 261?
Just brainstorming here. I haven't looked in the cylinder through the spark
plug
hole to see if I can stick a piece of wire in there and get it to kink to
guage
the bore. ok, stupid idea, hehe
Grant Galbraith wrote:
> I found what I hoped was a 261 in a '54 4400. Had the captains bars. Sadly
the
> casting # was for a 235. I have also been told that the bars were in some
'53
> 235 PG engines. I asked Patrick, he said it's a good indication you have a
261
> if you see captains bars, but don't bet the farm on it.
>
> Grant
>
> Allen Jones wrote:
>
> > Hmmmm, I was told that the captain's bars were for 261s only, two bars
for a
> > US casting and one bar for a Canadian casting (may be the other way
around).
> > Everyone with a Chevrolet inline run out, look at your blocks, and let
us
> > know!!
> >
> > Sometimes the head casting number doesn't work as a 235 head is easily
> > modified to work on the 261 (as I have modified a 235 848 head to fit my
> > Canadian 261). Also, some later, full-flow 261s can be IDed by the
larger
> > diameter oil filter lines.
> >
> > I hope you've got a 261!!!
> >
> > Allen in Seattle
> > '50 3100
> > Inliner No. 2235
> >
> > ----- Original Message -----
> > From: "Jack Halton" <safesix@earthlink.net>
> > To: "oletrucks" <oletrucks@autox.team.net>; "New Mexico Jim"
> > <ADvent@thuntek.net>
> > Cc: "the dodgeless listserver" <oletrucks@autox.team.net>
> > Sent: Friday, August 04, 2000 9:01 AM
> > Subject: Re: [oletrucks] 235 or 261?
> >
> > > My 261 has the "captain's bars" behind the starter but I'm told that
some
> > > 235's have them too. Strange that somebody would go to the trouble of
> > > removing casting numbers. Measuring bore size looks to be the only
sure
> > way
> > > to know what motor you've got. Is there a casting number visible on
the
> > > head? 261's had extra steam holes, so the head has a different casting
> > > number than a 235. I have a list somewhere.
> > >
> > > Jack Halton
> > > 51 GMC 1/2 ton
> > > Winter Park FL
> > > ----- Original Message -----
> > > From: "New Mexico Jim" <ADvent@thuntek.net>
> > > Cc: "the dodgeless listserver" <oletrucks@autox.team.net>
> > > Sent: Friday, August 04, 2000 11:27 AM
> > > Subject: [oletrucks] 235 or 261?
> > >
> > >
> > > >
> > > >
> > > > Somebody else swapped out engines in my 51 two ton dump with a 235
or a
> > > 261. It
> > > > is green and has 2 cast in vertical lines right about the middle of
the
> > > starter
> > > > on the block. There are no casting numbers and the numbers on the
pad to
> > > the
> > > > rear of the distributor has been machined off. This appears to be a
261,
> > > is it?
> > > > I really don't want to pull the head to find out. If it is a 261, I
am
> > > going to
> > > > swap engines between my 50 ½ ton and my 51 two ton. thx
> > > >
> > > > oletrucks is devoted to Chevy and GM trucks built between 1941 and
1959
> > > >
> > >
> > > oletrucks is devoted to Chevy and GM trucks built between 1941 and
1959
> > >
> >
> > oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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