Pulley size is now a spec

Bill Grubbs · 10-22-2009, 11:13 AM

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

Quote:

Originally Posted by Bill Grubbs

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

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

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

10-22-2009, 11:13 AM	#1
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 Also important to note is OEM pulley's only! No aftermarket! No playing with Belt and groove widths. Bill

10-23-2009, 10:02 AM	#6
goinbroke2 Senior Member Join Date: Mar 2002 Location: NS CANADA Posts: 884 Likes: 1,564 Liked 381 Times in 148 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	#8
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