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-   -   Pulley size is now a spec (https://classracer.com/classforum/showthread.php?t=21240)

Stocker 2 10-22-2009 08:38 AM
Pulley size is now a spec
 
Check it out, pulley sizes are now part of the specs on the supercharged Mustangs.

http://www.nhra.net/tech_specs/engine/blueprints/FORD-08.rtf

BlueOval Ralph 10-22-2009 10:26 AM
Re: Pulley size is now a spec
 
More important what DIA HAVE THEY BEEN RUNING AND WHAT DIA WERE THE RECORDS SET WITH GONE THRU TECH WITH?? LOOKS TO ME AS NHRA BOY'S DROPPED THE BALL BIG TIME N THIS ONE. The 57 fords had their dia llisted and as I remeber the Stick Shift was different than Auto had more Boost.

Quote:
Originally Posted by Stocker 2 (Post 147328)
Check it out, pulley sizes are now part of the specs on the supercharged Mustangs.

http://www.nhra.net/tech_specs/engin...ts/FORD-08.rtf

Bill Grubbs 10-22-2009 11:13 AM
Re: Pulley size is now a spec
 
Also important to note is OEM pulley's only! No aftermarket! No playing with Belt and groove widths.

Bill

Chad Rhodes 10-22-2009 11:58 AM
Re: Pulley size is now a spec
 
Quote:
Originally Posted by Bill Grubbs (Post 147347)
Also important to note is OEM pulley's only! No aftermarket! No playing with Belt and groove widths.

Bill
exactly right Bill, it should also state that the tensioners must be OEM as well

Tim Kish 10-23-2009 07:50 AM
Re: Pulley size is now a spec
 
Quote:
Originally Posted by Chad Rhodes (Post 147357)
exactly right Bill, it should also state that the tensioners must be OEM as well
Why should the tensioner have to be OEM?

Chad Rhodes 10-23-2009 09:46 AM
Re: Pulley size is now a spec
 
Quote:
Originally Posted by Tim Kish (Post 147490)
Why should the tensioner have to be OEM?
the OEM tensioner is spring loaded. Metco and others make tensioners that are positive acting, and act on a different place on the belt thus increasing boost by eliminating any slippage. The tensioner should at minimum have to be of OEM type (spring loaded) and should be in the stock location

Jeff Lee 10-23-2009 10:02 AM
Re: Pulley size is now a spec
 
Quote:
Originally Posted by Chad Rhodes (Post 147513)
the OEM tensioner is spring loaded. Metco and others make tensioners that are positive acting, and act on a different place on the belt thus increasing boost by eliminating any slippage. The tensioner should at minimum have to be of OEM type (spring loaded) and should be in the stock location
Know thy enemy! I assume you would make NHRA aware of this?

goinbroke2 10-23-2009 10:02 AM
Re: Pulley size is now a spec
 
Oh puulease! Then I'll run a belt soaked in belt dressing that has zero slip.


Man the hating is so obvious!

I wish obama motors and fiat would hurry up and field their pony cars........

Chad Rhodes 10-23-2009 10:16 AM
Re: Pulley size is now a spec
 
Quote:
Originally Posted by goinbroke2 (Post 147517)
Oh puulease! Then I'll run a belt soaked in belt dressing that has zero slip.


Man the hating is so obvious!

I wish obama motors and fiat would hurry up and field their pony cars........
there is no "hating", i just know what the supercharged mod motors are capable of. I do applaud NHRA for specifying the pulleys finally.

Bill Grubbs 10-23-2009 11:53 AM
Re: Pulley size is now a spec
 
Chad,
The pulley spec has always been there, just not published. However, I do not know if they were checking them.

Bill


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