Help: I am losing BOOST!
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
It's a 1000% OD pulley. It shows 6' not 6" 
Thread Starter
Burning Brakes
Joined: Sep 2004
Posts: 812
Likes: 20
From: www.shockerracing.com
One other question, I just noticed tonight that when I floor it my fuel pressure drops down to about 40 when it normally runs at 60. I do have a brand new Racetronix fuel pump in and a new filter, should this still be happening?
Race Director
Joined: Apr 2009
Posts: 10,581
Likes: 252
From: SE TEX
No!!! From everything I have read and understand even at peak fuel consumption you still want at least 50 psi, preferably more. Maybe this could be tuned around but I would just consider that dangerous.
Race Director
Joined: Apr 2009
Posts: 10,581
Likes: 252
From: SE TEX
I would think the blower cam would not bleed off much if any boost so I am guessing around 10 lbs. My 4.25 made 5.5-7 depending on weather and from what the Procharger tech told me expect 1 lb per .1 pulley reduction. Stock cubed motor, blower cam and full exhaust was on mine BTW.
