Low Boost any suggestions??

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Brsmustng93

New Member

Mar 20, 2008

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Jun 11, 2008

#1

• Jun 11, 2008

• #1

I recently put a paxton novi 1220 SL supercharger on my 93 5.0 and the car seems to be running okay, but now that I have installed my boost gauge I am only seeing about 1-3psi of boost. The pulley is rated at 5-6psi could my engine flow that well that the boost numbers are that low? Mods are e-303 cam, 70mmtb, cobra intake manifold, ported e-7 heads w/ bigger valves, and shorty headers. Thanks for any suggestions

 

Foxfan88

My Grandpa has great wood.

Sep 13, 2004

2,487

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Miami, Ok

Jun 11, 2008

#2

• Jun 11, 2008

• #2

i doubt the mods you have will cause that much loss of boost.
i ran ported e7s, typhoon and b-cam and made 5 psi on a "5psi" vortech
make sure your not bleeding boost off somewhere.

i made the mistake of misrouting my PCV bypass when i put my blower on originally. i was bleeding boost back in front of the blower, ran better just not a whole lo. fixed that and it picked up alot of power making 5 psi...

 

Guero

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Oct 11, 2005

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Jun 11, 2008

#3

• Jun 11, 2008

• #3

How is the PCV suppose 2 be run with a S/C?

 

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Brsmustng93

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Mar 20, 2008

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Jun 11, 2008

#4

• Jun 11, 2008

• #4

The way I have my PCV routed is the nipple on the tb is capped off, and the line from the passenger valve cover is vented over to the air box were it is fed into a fuel filter to catch any oil. This is the way the instructions in my kit said to run the pcv so that you do not pressurise your crak case. Is this the way you guys have yours set up??

 

mustangfan1990

New Member

Jul 17, 2005

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Lenoir, North Carolina

Jun 11, 2008

#5

• Jun 11, 2008

• #5

I dont run a PCV valve I have mine capped off completly and run open breather on the passenger side vlave cover. But yeah that is how you are suppose to run it if you dont have a power pipe. I do so ican use it like that

 

Guero

Active Member

Oct 11, 2005

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Jun 12, 2008

#6

• Jun 12, 2008

• #6

Brsmustng93 said:

The way I have my PCV routed is the nipple on the tb is capped off, and the line from the passenger valve cover is vented over to the air box were it is fed into a fuel filter to catch any oil. This is the way the instructions in my kit said to run the pcv so that you do not pressurise your crak case. Is this the way you guys have yours set up??

Click to expand...

Yep thats how mine is 2...

 

1993SSP

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Sep 5, 2001

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Jun 12, 2008

#7

• Jun 12, 2008

• #7

Check your belt tension, my Vortech was only putting out 3PSI on the dyno, snugged up the belt a little and got the other 2PSI out of it, mine is a 5-6 unit.

 

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89llx

5 Year Member

Aug 31, 2009

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Oct 29, 2010

#8

• Oct 29, 2010

• #8

I went from 6psi to 10 by puting sealer on the threads where the blow off valve screws into the power pipe

 

T

time only

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Nov 15, 2002

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Miami,FL

Oct 30, 2010

#9

• Oct 30, 2010

• #9

Check if all your flexable rubber tubing don't have too sharp of a bend in them,that is one reason power pipe work so good it that it give the air such a smooth path.
My friend have a then stock top end everything 5.0 with the standard 6psi A-trim and he did not even see 5psi on the gauge. It will be less for you with the better flowing intake,heads etc.

 

Rick 91GT

Mustang Master

Nov 29, 1999

9,692

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PA

Oct 30, 2010

#10

• Oct 30, 2010

• #10

Where is the boost guage connected to the motor? Is it tapped into another vaccum line, what item is on the line?

 

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frcefedlx

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Dec 6, 2004

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Oct 31, 2010

#11

• Oct 31, 2010

• #11

The belt will stretch some when new. Could be belt slippage as well. If You can twist the belt 90deg. it is to loose