Pulley size is now a spec

Tim Kish · 10-23-2009, 07:50 AM

Quote:

Originally Posted by Chad Rhodes

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

Quote:

Originally Posted by Tim Kish

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

Quote:

Originally Posted by Chad Rhodes

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

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

Quote:

Originally Posted by goinbroke2

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

Chad,
The pulley spec has always been there, just not published. However, I do not know if they were checking them.

Bill

Bob Pagano · 10-23-2009, 12:44 PM

Hate.....thats another story but its tough enough dealing with fuel injected cars in the same class but SUPERCHARGED should be in a class by its self just like AFX was. NHRA has a can of worms on their hands and no one in those classes have a chance against them least they break or red light.

Chad Rhodes · 10-23-2009, 12:50 PM

Quote:

Originally Posted by Bill Grubbs

Chad,
The pulley spec has always been there, just not published. However, I do not know if they were checking them.

Bill

Back at the beginning of the year I asked an NHRA divisional tech guy if they had a spec for it, and i was told that Glendora may, but they did not have it in the field. Obviously i have know way of verifying this.

Tim Kish · 10-23-2009, 03:24 PM

Quote:

Originally Posted by Chad Rhodes

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

Are you running OEM valve spring seat pressure? Becuase if you are allowed to change your valve springs to prevent valve float you'll make more power and we can't have that.

Chad Rhodes · 10-23-2009, 04:05 PM

Quote:

Originally Posted by Tim Kish

Are you running OEM valve spring seat pressure? Becuase if you are allowed to change your valve springs to prevent valve float you'll make more power and we can't have that.

apples and oranges

if the factory tensioner is spring loaded, so should whatever tensioner that is on it. otherwise its kinda like putting solid roller lifters on a hyd roller cam

10-23-2009, 10:02 AM	#4
goinbroke2 Senior Member Join Date: Mar 2002 Location: NS CANADA Posts: 899 Likes: 1,673 Liked 398 Times in 157 Posts	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........

10-23-2009, 11:53 AM	#6
Bill Grubbs Member Join Date: Oct 2002 Location: Magnolia, Texas Posts: 416 Likes: 3 Liked 564 Times in 66 Posts	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

10-23-2009, 12:44 PM	#7
Bob Pagano VIP Member Join Date: Jun 2002 Location: New Holland, PA Mooresville,NC Posts: 1,163 Likes: 241 Liked 16 Times in 11 Posts	Re: Pulley size is now a spec Hate.....thats another story but its tough enough dealing with fuel injected cars in the same class but SUPERCHARGED should be in a class by its self just like AFX was. NHRA has a can of worms on their hands and no one in those classes have a chance against them least they break or red light. __________________ Bob Pagano A/SA