Hi all.

My uncle owns an original 1969 F100, with a 240 cubic inch engine. It runs like new. Grandpa said it was a canadian motor imported to Sydney and assembled there in '69. I also own a spare 240 motor. I have noticed that the 240 has the V8 bellhosing pattern & fan. Can anyone tell me the history of this engine (I know more about the 302 & 351 Clevelands, and the 200 & 250 standard/crossflow Falcon engines than the old 240). What is the difference between the 240 and the 300, and can a 240 be stroked into a 300, like the 302C to a 351C, or the 200/6 to the 250/6?

Thanks,
335C

 

The 240 can be converted to a 300 simply by changing the internal. The 240 does have smaller combustion chambers in the heads, so compression could be too high if you don't swap the head or take other measures to reduce compression.

 

Silver streak,

Thanks for the post. By 'changing the internals' do you mean simply sroking by changing rods & crank (302 C to 351 C) or pistons & crank (351M to 400) or does it involve boring out?

335C

 

The bore of both engines is 4". I can't remember if you have to change the crank and rods or crank and pistons.

Just curious, how do you stroke a 302 to 351 with with factory parts when the 302 has about 1.25" less deck height than a 351? Does the 351C have a shorter deck height than the W?

 

He's aussie. He has a bunch of stuff that we didn't have here in america. He's got the 302 cleveland and the 351c...

To convert a 240 to a 300, you will have to swap crank rods and pistons. The crank has a 4" stroke versus the 3.18" stroke of a 240. The rods on a 240 are longer and the CH is shorter (iirc).

The 240/300 is pretty rare in .au so this means it'll probably be more expensive to build than any other locally produced engine. Performance parts will probably have to be imported from the US, etc. If you'd rather not spend alot of money, the crossflow 250 is supposed to be a decent swap. Same HP but less torque. It'll be fine in a light-duty truck that doesn't see much towing.


-=Whittey=-

 

>He's aussie. He has a bunch of stuff that we didn't have
>here in america. He's got the 302 cleveland and the 351c...
>

Yes you are correct about being an ausie, converting a 302 Cleveland to a 351 Cleveland is very simple, just swap crank & rods. Heads are slightly different, the 302 gives higher compression.

>To convert a 240 to a 300, you will have to swap crank rods
>and pistons. The crank has a 4" stroke versus the 3.18"
>stroke of a 240. The rods on a 240 are longer and the CH is
>shorter (iirc).
>

Thanks

>The 240/300 is pretty rare in .au so this means it'll
>probably be more expensive to build than any other locally
>produced engine. Performance parts will probably have to be
>imported from the US, etc. If you'd rather not spend alot of
>money, the crossflow 250 is supposed to be a decent swap.
>Same HP but less torque. It'll be fine in a light-duty truck
>that doesn't see much towing.

Your right agian, I know only of one 300/6 here in Aus. and only two 240's. One is my uncle's and the other is my 'spare-parts' 240. When you say "that F100's got a 240 motor in it" around here you you usually get asked: "you mean a 250?" or a dazed: "240?? what the hell is that??", because they are virtually unknown.

On the other hand I know quite a few blokes however who have the 250 Crossflow in their F100's (very common here, most falcons have them). The 250 is faster than the 240, and will drag it off from a stop, but won't even come close to the 240's pulling power in the hills, especially loaded.

335C

 

If you're into spending the money, swapping a 4bbl carb and aluminum intake with headers and you'll beat any 250 with similar mods. A cam swap and a bit of compression and you'll be tough to beat by any similarly streetable 250. The 4" bore and short stroke will let you rev ot the sky relatively easily if you want it to. Then a suitably low gear will help you off the line and with towing if thats what you're after.


-=Whittey=-