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Austinsevenfriends
Badly Scored Cylinder - Printable Version

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RE: Badly Scored Cylinder - stuartu - 09-04-2018

(09-04-2018, 05:39 PM)Austin in the Shed Wrote: Not sure what your blower is (Roots type?)Is it any good,it could be taking as much power to drive it as it produces.Is  drawing oil though the s/c causing it to burn oil?
Dave, I presume it's one of these:

http://www.vintagemgparts.com/article5.html

Regards, Stuart

RE: Badly Scored Cylinder - Wills - 09-04-2018

(09-04-2018, 08:32 PM)stuartu Wrote:
(09-04-2018, 05:39 PM)Austin in the Shed Wrote: Not sure what your blower is (Roots type?)Is it any good,it could be taking as much power to drive it as it produces.Is  drawing oil though the s/c causing it to burn oil?
Dave, I presume it's one of these:

http://www.vintagemgparts.com/article5.html

Regards, Stuart
It’s that one yes - mk22 GM cabin blower. Central pressurised oil feed. It does use a bit of oil but I suspect it is mostly leaking out of the sides rather than burning! Blower running at 1 1/8th engine speed, it should be worth having it there, if it’s running right, it’s certainly not worth it as it it is right now! Looks like a complete engine rebuild tbh. Thanks all ?

RE: Badly Scored Cylinder - Austin in the Shed - 10-04-2018

Is this the same as a J 75 Stuart?
If so I think they take quite a lot of power to drive them.
If its in a trials car the carb will need a good air filter.

RE: Badly Scored Cylinder - stuartu - 10-04-2018

I think it's Godfrey's cabin blower version of the J75, Dave. I've got one kicking around somewhere. I will be interested to hear how Wills gets on, I had a vague idea of using mine with the Grasshopper drive you machined for me....eventually!

Regards,
Stuart
Wills, do you have a boost gauge on your car? I would be interested to know at what rpm you see atmospheric on a steady throttle opening.

Regards,
Stuart

RE: Badly Scored Cylinder - Wills - 10-04-2018

(10-04-2018, 09:12 AM)stuartu Wrote: Wills, do you have a boost gauge on your car? I would be interested to know at what rpm you see atmospheric on a steady throttle opening.

Regards,
Stuart
Im afraid I don’t have one, but think it’s a very good idea for when it’s back together. I think in the meantime I’ll be running the car unblown with a spare engine I’ve got lying around.

RE: Badly Scored Cylinder - Ruairidh Dunford - 10-04-2018

William - is this the engine from Barry Clarke’s Grotty Chummy?

RE: Badly Scored Cylinder - Colin Reed - 10-04-2018

HI Wills,

Just a suggestion before you strip the engine down  check the cam timing with a Degree wheel & dial gauge also check valve lift,
As you need to know what camshaft has been fitted,  when you have that information and post it on this Forum you will receive some very good advice on its suitability for your application .

PS  When you said it was Smoking was that from the Exhaust or just from the breathers.

All the Best
Colin
NZ