FPR shim, ?
Logistics Pro
Joined: Oct 2008
Posts: 4,818
Likes: 1
From: Avilla, IN
I think there may have been some confusion with the directions.
So just to clarify, does the BB go between the tappet and the spring?
That's what I did a year ago. It went from 55 psi to 66 psi, so I'm assumming I did it right.
But over the phone it sounded like Jacob may have misunderstood where the BB goes.
So just to clarify, does the BB go between the tappet and the spring?
That's what I did a year ago. It went from 55 psi to 66 psi, so I'm assumming I did it right.
But over the phone it sounded like Jacob may have misunderstood where the BB goes.
Logistics Pro
Joined: Oct 2008
Posts: 4,818
Likes: 1
From: Avilla, IN
Thats exactly the way I understand it, but it sounded like he took the cap off, then the spring, then the tappet, put the BB in the hole where the tappet was, and then put the tappet back in followed by the spring and cap.
Senior User
Joined: May 2010
Posts: 214
Likes: 0
I did this mod on my truck because my pressure was only 35 but the BB only got me up to 55. So I used a #4 machine screw and two brass nuts and grounded them down to fit into the tappet and now it's adjustable and I have mine set to 70psi.
Postmaster
Joined: Jun 2007
Posts: 2,795
Likes: 1
From: Rogue River, OR
Good job, you have a creative mind.. Somewhere there are instructions on how to do just that but for the life of me I couldn't find them.
Glad that it worked out for you.
Rog
Glad that it worked out for you.
Rog
Last edited by kawa; Jul 8, 2010 at 08:18 PM. Reason: spelling
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Senior User
Joined: Dec 2007
Posts: 452
Likes: 0
From: Lizton, IN
i just shimmed mine from 49 to 72 psi at idle. If 80 is the max should I be worried about the pressure above idle? In other words, should I check at say 2,400-2,500 rpm where it would be running going 75 mph down the interstate? Would that put me over the 80 psi?
I can say it runs much smoother and more responsive.
I can say it runs much smoother and more responsive.
Senior User
Joined: May 2007
Posts: 248
Likes: 1
I have an indoor garage but its so full of junk and woodworking tools I cant work on anything inside. Gonna check mine tomorrow.
There's only two things that excite a man, expensive toys and real expensive toys.
There's only two things that excite a man, expensive toys and real expensive toys.
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Deerslayinrenek
1987 - 1996 F150 & Larger F-Series Trucks
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Nov 29, 2010 10:32 AM
