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Crank turning

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BobHorvath

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I have some oil starved rod journals that need turning. Any special expertise needed? Or will a good machine shop be OK? The answer is yes I did replace the oil pump, but too late
 
Only a machine shop with a crankshaft grinder. Get references, not all shops are created equal. A good shop will recommend crack checking before grinding and will have the equipment to do it (Magnaflux).

Marv J
 
Once you find an experinced shop you might as well bring them your flywheel, pressure plate and (harmonic balancer if you us one) and get the entire
lower end balance properly. It will make a big difference.

I just completed my new race crank; lightened, shot peened, cryogenically treated, polished and balanced. I hope its the last one I do for a while, lot of hours steel massaging.


Dougie
 
Thanks for the input Dougie. I will look into the balance. Have you lightened your flywheel? If so, any ill effects? BTW my white 65 bj8 came from Portland. The guy selling it did not own it but also had two warehouse's full of very special cars including a collection of 29 former Indy race cars.
 
I have experience with a lightened flywheel in an MGB that I drove on the street and then turned into an SCCA race car. The aluminum flywheel improved the acceleration of the engine, but made it very hard to drive on the street. Starts from a dead stop require substantially more throttle and slipping the clutch substantially. Great for racing, not great for street use.
 
I have a lightened flywheel and have no problems with starting off the line. It is a stock part that had material milled off as opposed to a new aluminum one. It isn't as light as the new ones, kinda like a momma bear. Bill Bolton sells them on exchange.
 
BobHorvath said:
Thanks for the input Dougie. I will look into the balance. Have you lightened your flywheel? If so, any ill effects? BTW my white 65 bj8 came from Portland. The guy selling it did not own it but also had two warehouse's full of very special cars including a collection of 29 former Indy race cars.
Click to expand...

Yes, by all means a lightened flywheel is a must when racing a big Healey. My race car has a 15lb. flywheel, much too light for a street driver. A lot of our local club members use a lightened 25lb f/w in their drivers which is ideal, makes a huge improvement in acceleration. Here's another good source:
https://www.tomsimport.com/new/index.asp

There's more of those "special" warehouses around this town then you would ever expect. I've had the pleasure of peeking in a few of them....hard to leave.

Dougie
 
From memory, I'm thinking mine was cut down to 22Lbs, and it doesn't present any problems on the street.
 
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