August 2012 Prelim Tech Bull
#1
Posted 07-10-2012 05:27 PM
DATE: July 20, 2012
NUMBER: TB 12â€08
FROM: Club Racing Board
TO: Competitors, Stewards, and Scrutineers
SUBJECT: Errors and Omissions, Competition Adjustments, Clarifications, and Classifications
All changes are effective 8/1/2012 unless otherwise noted.
NOTE: This preliminary version of the Club Racing Technical Bulletin is provided at this time as a service
to the membership. These items may be corrected and will not be official until published on the Fastrack
page of the scca.com website on or about July 20.
Spec Miata
1. #8730 (Jim Drago) Clarify the use of shot peening.
In section 9.1.8.C.1.c.1, clarify the crankshaft language by adding the following:
"The stock Mazda Miata crankshaft must be used with no modifications except for machining to allow
the use of main and rod bearings as allowed in 2 below. Shot peening to stress relieve the crankshaft
after machining is permitted. The following table lists the permitted crankshaft for each model year and
the minimum weight (not including pilot bearing or hardware)."
#2
Posted 07-10-2012 05:46 PM
#3
Posted 07-10-2012 09:31 PM
Jim
East Street Auto Parts
Jim@Eaststreet.com
800 700 9080
#4
Posted 07-11-2012 03:23 AM
"America is all about speed. Hot, nasty, bad-ass speed," -Eleanor Roosevelt
#5
Posted 07-11-2012 05:50 AM
This is ancient ( literally) technology, nothing new, google is your friend
Jim
Since allowing the cranks to be turned( cost saving, not performance enhancing) when the 09 engine rules and specs went into the GCR,
Since you have implied that I have no knowledge of technology and don't know how to use Google, I sure as well can't read/understand the GCR SMCS, therefore will you please specify the 09 or 10 engine rules and specs within the GCR SMCS that allows cranks to be turned.
If I were writting a rule, I'd use the word grind relative to decreasing the size of crank journals, turning is a lathe single point tool process. I could talk further about shoot peening, but that would only complicate and clutter the discussion.
#6
Posted 07-11-2012 06:12 AM
East Street Auto Parts
Jim@Eaststreet.com
800 700 9080
#7
Posted 07-11-2012 07:05 AM
You asked to explain, I did.( against my better judgement) nothing was implied...
Since you have implied that I have no knowledge of technology and don't know how to use Google, I sure as well can't read/understand the GCR SMCS, therefore will you please specify the 09 or 10 engine rules and specs within the GCR SMCS that allows cranks to be turned.
Come on Jim, your a note motor builder and on the CRB, you should be able to support a SCCA member finding the rule within the GCR SMCS that allows cranks to be turned.
#8
Posted 07-11-2012 07:34 AM
Your first post, I was foolish enough to think you wanted an answer to the question you asked. You asked to explain the addition to a rule that is almost three years old?Your 'asking" now to point out a rule that allows cranks to be turned, In actuality, your not asking, (you are challenging or questioning the validity) As you are aware, you quoted it in your first post.
You don't like the word "machining" , in order to install smaller rod/main bearings, you must "machine",( but again, you know this as well) if you don't like that word and would prefer another like "turn" or "grind", send a letter. I think it is clear, but have no issues adding other words as well. But won't do so less a letter from someone asking as much.
Or do you have a problem with cranks being turned/ground or machined?
This is my last post on this matter. If you need further clarification, you can email or call me directly.
- Glenn and mellen like this
East Street Auto Parts
Jim@Eaststreet.com
800 700 9080
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