(MARRS-RX7) 2011 class rules

geaton02 at comcast.net geaton02
Sat Jan 15 04:23:59 CET 2011


If the Racing Beat pulley is 2 7/8" then the wording should reflect no alternator pulleys greater than 2 7/8". The larger the alternator pulley the slower it will turn. 
----- Original Message ----- 
From: "Owen Schefer" <owen.schefer at gmail.com> 
To: "Spec RX-7" <spec7 at specrx7.com> 
Sent: Friday, January 14, 2011 10:02:22 PM 
Subject: Re: (MARRS-RX7) 2011 class rules 

Isn't the smaller diameter on an accessory actually gonna spin it faster and be a disadvantage. To under drive them you would want a small crank (ecentric) pulley and huge accessory pulleys. 

Not that I am in SPEC7 so I know my vote does not count. 

Owen 


On Fri, Jan 14, 2011 at 6:09 PM, John Maslin < jhmaslin at gmail.com > wrote: 


Jack/Greg, 

The problem with the revised words is that the $50 Racing Beat pulley is 2 7/8" in diameter. The $17 one from RE Speed is advertised as 2 5/8". At that cost I'd hate to eliminate it, unless that reduction of 1/4" is seen as too much of an advantage. I don't know. 

If 2 5/8" is okay, then I suggest changing the language to " If the air pump is removed an alternate double sheave alternator pulley is allowed; such as Racing Beat part #11479 or any alternate pulley of at least 2 5/8 inches diameter. " If not, then Jack's version from 6:10 today is fine (except I think the word is spelled 'sheave'). 

John 






On Fri, Jan 14, 2011 at 7:49 PM, Gregory Eaton < geaton02 at comcast.net > wrote: 




Excellent, Thanks for doing this Jack 

Sent from my iPhone 




On Jan 14, 2011, at 6:10 PM, Jack Burrows < rx7rainman at gmail.com > wrote: 






Good point, Greg. how's this? 

If the air pump is removed an alternate double sheeve alternator pulley is allowed; Racing Beat part #11479 or any alternate pulley of the same dimension is allowed . 


Jack 


On Fri, Jan 14, 2011 at 2:01 PM, Gregory Eaton < geaton02 at comcast.net > wrote: 




You may want to give a diameter for the pulley, so an underdrive pulley can't be used. 

Sent from my iPhone 




On Jan 13, 2011, at 9:57 PM, John Maslin < jhmaslin at gmail.com > wrote: 





Thanks, Jack. Looks good to me. 
John 


On Wed, Jan 12, 2011 at 9:05 PM, Jack Burrows < rx7rainman at gmail.com > wrote: 


OK, so I may or may not have been able to foist the job of Class Administrator off on an unsuspecting sucker... er... eager volunteer yet. I've been asked by the region's Club Racing Committee to provide the 2011 class rules, and what i propose to send them is attached. 


The rules are the same as last year with one exception. As I remember, we discussed a couple changes but agreed on one. We agreed to accept John Maslin's proposal to drop the apparent specific requirement for a Racing Beat replacement alternator pulley in cars which have had the emissions removed per the rules. A close reading of those rules as they were written appeared to allow it anyway, but it wasn't clear whether it was a recommendation or a requirement. With that in mind, I've modified the final paragraph to read as follows (changed language highlighted in yellow): 




10. EMISSIONS SYSTEM ? Anything performing an exclusively emissions related function may be removed. The stock phenolic carburetor to intake manifold spacer shall not be removed or modified. The charcoal canister shall remain and be unmodified. Removal of the shutter valve from the intake manifold is permitted. Any resulting holes must be sealed. A block off plate may be used in place of the air control valve. If not removed, emissions control devices shall not be modified. If the air pump is removed an alternate double sheeve alternator pulley is allowed (Racing Beat part #11479 recommended) . 


Otherwise the only difference in the rules was a change at that top from 2010 to 2011. 


Unless anyone speaks up within the next few days with any heartache, I intend to send these back to the club office as our class rules for 2011. 


Jack Burrows 
SRX7 #71 
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