[Nobbc] THANKSGIVING RIDE

[wendell bain]

Clif,

Greg's advice on using 120-150 grit paper is good. If it's just  
surface rust
it should give you a usable f/w.

Cheers,
Wendell

On Nov 19, 2010, at 8:12 AM, Greg Tatarian wrote:

>  Clif,
>
> Try JNW Engine http://jnweng.com/
> Talk to Jerry and tell him Greg Tatarian with the Lotuses sent you.  
> I put on a tech session at Jerry's shop last year for the NOBBC.
>
> Not sure anyone's going to measure 10 microns - they are going to  
> cut until the surface is smooth and flat, but you can ask him to go  
> as lightly as possible. If it's just light surface rust, I would  
> use a surface plate and 120-150 grit paper, myself, and save the  
> $40  (at least for flywheels that have the friction surface level  
> or raise above the surrounding portion).
>
> Pros and cons of lightened steel vs. stock, vs. aluminum flywheels  
> are generally not specific to any car make or model but are pretty  
> uniform; lightened steel needs to be done properly or you can have  
> it fly apart on you at high revs. Stock is fine, but heavy.  
> Aluminum flywheels have to have the right design and treatment for  
> the aluminum so that the steel flywheel face and surrounding  
> aluminum material expand and contract much as a unit, and so the  
> aluminum isn't too soft, and the replaceable steel insert has to be  
> available for future replacements. Some don't like alu because it  
> affects apparent torque, particularly with small, light motors  
> coming off the line. Some poorly designed or made units have had  
> problems with ring gear coming off (same problem of differential  
> expansion rates, as well as different pinning methods). Lighter  
> flywheels definitely make the motor more throttle responsive. Don't  
> forget to check the tooth bevel of the ring gear on the new f/w  
> matches the engagement of your starter (front or back), as we  
> talked about in Napa.
>
> Cheers,
> Greg
>
>
>
>
>
>
> On 11/18/2010 11:36 PM, Clif & Deborah Williamson wrote:
>>  Does anybody know a good shop for this operation?  I think 10  
>> microns is required.
>> Thank,
>> Clif  74 JH
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