cam shaft and crank

colzy28 · Post by **colzy28** » Sun Feb 07, 2010 6:45 pm

Good afternoon All,

I have completed a basic stripdown of my grey, and have some queries to the specs of the cam and crankshaft.

I would like to know the details of the cam or where I can find them out (first three photos). I also would like to know about the modifications made to the bearing caps(last photo).

I was informed that the engine had had some work done on it when it was purchased but that was about all I was told.

Any leads on what the internal specs are, would be appreciated.

Cheers

Trev · Post by **Trev** » Sun Feb 07, 2010 7:51 pm

The crank has strengthening blocks to help stop the crank flexing and breaking, Looks like you had a good engine there, Trev

.

ek61 · Post by **ek61** » Mon Feb 08, 2010 6:14 pm

yeh wouldnt mind a bit more info on that crank support set up myself

Baz · Post by **Baz** » Mon Feb 08, 2010 8:46 pm

The main bearing blocks were a common mod many years ago. Don't know if people still do it ?
I had the same blocks on a grey in the mid 70s that was done in Sydney by Waggott Engineering. Can't remember if they had those allen key bolts in them though ?
Impossible to tell what cam it is from photos other than the fact that it is fitted with an alloy timing gear.
Cheers,
Baz.

Trev · Post by **Trev** » Tue Feb 09, 2010 3:59 am

Baz wrote:The main bearing blocks were a common mod many years ago. Don't know if people still do it ?
I had the same blocks on a grey in the mid 70s that was done in Sydney by Waggott Engineering. Can't remember if they had those allen key bolts in them though ?
Impossible to tell what cam it is from photos other than the fact that it is fitted with an alloy timing gear.
Cheers,
Baz.

Hi Baz, a few people I know have made some new ones for there grey motors, the allen key is to screw down onto the cap so it doesn't flex, Trev

.

Baz · Post by **Baz** » Tue Feb 09, 2010 11:28 am

The blocks on my one may have had the allen keys. A long time ago and I don't remember.
I do remember that I had to give Waggot my Main bearing caps and they machined the tops of the caps to accept the blocks.
Cheers,
Baz.

ek61 · Post by **ek61** » Tue Feb 09, 2010 4:20 pm

where can i get some or will they have to be made ?

cheers dave

HPaddict · Post by **HPaddict** » Wed Feb 10, 2010 12:15 am

the cam should have markings at the other end if its an aftermarket grind

FB MAD · Post by **FB MAD** » Wed Feb 10, 2010 10:17 am

The bearing supports were a common ( in the day ) strengthening modification to assist to preventing main bearing cap float and loading and failure of the bearing from crankshaft whip under higher rpm.

Best thing you can do for a grey crank is to have it balanced.It makes a hell of a difference to its smooth running and helps considerably under high rpm situations.

Hard to tell by the photos but the cam lobes "appear" to be not as steeply ramped as a standard cam ( giving more opening duration ) would have and may have a slightly higher lift?? so it may be an aftermarket cam maybe??.
You could get a camshaft speialist to have the cam specs measured maybe if you really want to know its exact specs.

Measure the valve head diameter as they sorta look about red motor valve size??

Is there any port work in the head?? Measure the bore to see what size it is.

You might need to provide a few more pics.

Post by **Blacky** » Wed Feb 10, 2010 10:18 am

ek61 wrote:where can i get some or will they have to be made ?

cheers dave

I havent seen any for sale anywhere - I think its a " make your own " deal.

Stygian · Post by **Stygian** » Wed Feb 10, 2010 10:29 am

ek61 wrote:where can i get some or will they have to be made ?

cheers dave

Hey Dave, the guy who is going to rebuild my grey has spoken to me about these caps... he's into historic racing and knows a few things about hot greys... will let you know how I go... I'm also chasing down a Vauxhall L model engine for the crankshaft too...

FB MAD · Post by **FB MAD** » Wed Feb 10, 2010 10:38 am

Edna Blueflash wrote:
ek61 wrote:where can i get some or will they have to be made ?

cheers dave
Hey Dave, the guy who is going to rebuild my grey has spoken to me about these caps... he's into historic racing and knows a few things about hot greys... will let you know how I go... I'm also chasing down a Vauxhall L model engine for the crankshaft too...

What is the stroke on the Vauxhall L cranks??

ek61 · Post by **ek61** » Wed Feb 10, 2010 10:50 am

ive got my feelers out 4 a vaxhaul crank as well

ive been given a contact number of a guy who may have one

would be great if ya could find out about the crank support

cheers dave

Stygian · Post by **Stygian** » Wed Feb 10, 2010 8:49 pm

FB MAD wrote:
Edna Blueflash wrote:
ek61 wrote:where can i get some or will they have to be made ?

cheers dave
Hey Dave, the guy who is going to rebuild my grey has spoken to me about these caps... he's into historic racing and knows a few things about hot greys... will let you know how I go... I'm also chasing down a Vauxhall L model engine for the crankshaft too...
What is the stroke on the Vauxhall L cranks??

I know someone who has a shop manual with that very information Terry, and I would give him a call, but today he had all four wisdom teeth taken out...

Stygian · Post by **Stygian** » Wed Feb 10, 2010 8:58 pm

ek61 wrote:ive got my feelers out 4 a vaxhaul crank as well
would be great if ya could find out about the crank support
cheers dave

Hey Dave, I have been told on good authority that you want a crank out of the early L model engines, not the later ones, as these will not fit, so be careful...

Eric told me about the bearing caps at last year's Eastern Creek Classic... will buzz him soon about my engine...