Whipple pulley?

Reply Subscribe

Thread Tools

09-18-2007, 10:24 PM

JasonSmith

Registered

Thread Starter

Join Date: Feb 2005

Location: USA

Posts: 4,333

Likes: 1

Received 3 Likes on 3 Posts

Whipple pulley?

If my 3.118" pulley makes 7 lbs of boost on a 454, what will a 2.875" pulley make on the same motor?
Hp now is supposed to be 650ish. So hom much more with the added boost?

09-18-2007, 10:37 PM

Young Performance

Registered

Join Date: Jan 2004

Location: Tennessee

Posts: 4,480

Likes: 0

Received 40 Likes on 16 Posts

add 2-2.5 lbs or 9-9.5 lbs of boost. Should add between 50-75 hp, depending on a few variables. Eddie

09-18-2007, 11:31 PM

QWKRN U

Registered

Join Date: Jun 2007

Location: Osage Beach, MO

Posts: 963

Likes: 0

Received 8 Likes on 5 Posts

Turn it up....

09-18-2007, 11:37 PM

JasonSmith

Registered

Thread Starter

Join Date: Feb 2005

Location: USA

Posts: 4,333

Likes: 1

Received 3 Likes on 3 Posts

Quote:

Originally Posted by QWKRN U

Turn it up....

I got to! I got beat @ Perry. Besides, injectors & pullies were cheaper than new propellers.

09-18-2007, 11:53 PM

Griff

Charter Member # 55

Charter Member

Join Date: Oct 2000

Location: Omaha/LOTO

Posts: 19,556

Likes: 4,160

Received 1,821 Likes on 907 Posts

Stocking up on the XR's too, I hope. LOL

09-18-2007, 11:55 PM

JasonSmith

Registered

Thread Starter

Join Date: Feb 2005

Location: USA

Posts: 4,333

Likes: 1

Received 3 Likes on 3 Posts

I've used 2 of my spare drives, but 2 were stolen, so......

09-19-2007, 07:37 PM

zt260

Registered

Join Date: Dec 2003

Location: Hudson River, NY

Posts: 615

Likes: 0

Received 1 Like on 1 Post

Quote:

Originally Posted by JasonSmith

If my 3.118" pulley makes 7 lbs of boost on a 454, what will a 2.875" pulley make on the same motor?
Hp now is supposed to be 650ish. So hom much more with the added boost?

It would put you at 9psi+/- and into race fuel. (to be safe anyway) From my experience expect no more than 50Hp more. It could be less depending on your setup.

BTW, the reliabilty goes way down at this point.