Compression test.

On Thu, 08 Sep 2005 18:54:26 +1200, EMB <[email protected]> wrote:

>Samuel wrote:
>
>> i have been giving that option a great deal of thought, but am having
>> trouble finding a conversion kit for the 6 cylinder. it needs a different
>> bellhousing and different mounts to the 4 cylinder conversion. i don't have
>> the money to do a custom job at the moment so i have to keep an eye out for
>> some second hand bits.
>
>Bolt a 4cyl bellhousing onto the gearbox, and then it's all easy.

Only if you've got the right bellhousing to mate to the rest of the
gearbox. There were 6 different bellhousings for the Series II/IIa/III
boxes.

If it's a series III you're alright as there were only 2 bellhousings,
2.25 and 2.6. The only bit you need to be aware of is that behind the
bellhousing there is a distance piece on the layshaft which sets
layshaft endfloat. This may need to be changed for a different
thickness if the bellhousing is changed.

Alex

"Alex" <[email protected]> wrote in message
news:[email protected]...
> On Thu, 08 Sep 2005 18:54:26 +1200, EMB <[email protected]> wrote:
>
> >Samuel wrote:
> >
> >> i have been giving that option a great deal of thought, but am having
> >> trouble finding a conversion kit for the 6 cylinder. it needs a
different
> >> bellhousing and different mounts to the 4 cylinder conversion. i don't
have
> >> the money to do a custom job at the moment so i have to keep an eye out
for
> >> some second hand bits.
> >
> >Bolt a 4cyl bellhousing onto the gearbox, and then it's all easy.
>
> Only if you've got the right bellhousing to mate to the rest of the
> gearbox. There were 6 different bellhousings for the Series II/IIa/III
> boxes.
>
> If it's a series III you're alright as there were only 2 bellhousings,
> 2.25 and 2.6. The only bit you need to be aware of is that behind the
> bellhousing there is a distance piece on the layshaft which sets
> layshaft endfloat. This may need to be changed for a different
> thickness if the bellhousing is changed.
>
> Alex

as i see it, the problem is as follows. the 2.25 and 2.6 have different
gearboxes, the difference being the length of the main input shaft (is this
correct?). if i were to use conversion pieces designed for the 4 cylinder, i
would need to also replace the gearbox i have in at the moment. and the
modified engine mounts would not work due to the different mount location on
a 2.6 vs 2.25.

Sam.

>
>as i see it, the problem is as follows. the 2.25 and 2.6 have different
>gearboxes, the difference being the length of the main input shaft (is this
>correct?).

The gearbox is identical, the bellhousing is different. The input
shaft is the same length for the 4 and the 6. The length of the
bellhousing may well be different between the two, in order to
correctly engage the input shaft with the flywheel.

>if i were to use conversion pieces designed for the 4 cylinder, i
>would need to also replace the gearbox i have in at the moment. and the
>modified engine mounts would not work due to the different mount location on
>a 2.6 vs 2.25.
>

Yes, if you were to buy a kit for adapting a 4pot to a different
engine you would indeed need to get a 4-cyl gearbox or bellhousing,
and the modified engine mounts would probably need to be modified
again to fit. In this case the best method is to drop the engine in
and mate it, line the engine/props up and then weld the engine mounts
to the chassis to fit the engine as it sits.

Alex