• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-

Question about 04 GT + vortech

  • Thread starter Thread starter Mikedip7
  • Start date Start date Mar 30, 2019
M

Mikedip7

New Member
Oct 27, 2017
6
0
1
Mar 30, 2019
#1
  • Mar 30, 2019
  • #1
Hey guys, I’ve been helping out my friend recently with his 04 GT. He’s got an vortech v2 and should be putting out 8-9lbs. It’s a stock 3.60 pulley, boost gauge is showing 0 psi and 20 vacuum. I noticed the tensioner pulley was slipping and replaced the belt and tensioner. Still not reading any boost. Any suggestions? I was gonna try swapping out the Bosch bypass with a Proflow, but sadly I just noticed that the inlet / discharge are completely different sizes between the Bosch and proflow. Just looking for some direction?

Side note. Already checked all clamps, all are tight and no visible cracks or holes. and I do not hear any noise from the Bosch bypass when I rev the car up.
 

Dark04GT

10 Year Member
Apr 27, 2008
758
62
59
NC
Mar 31, 2019
#2
  • Mar 31, 2019
  • #2
With that size pulley I’m making 4 psi at 4K rpm and making 9 psi at 6k rpm+.

At idle and with normal sub 2k rpm driving I see nothing on the boost gauge - that’s normal.

Does the seat in the pants feel like the supercharger is producing boost?

Take pictures of your supercharger setup and trace the spot that you have placed your boost sensor so that we can visualize what you have going on. If the boost sensor is not reading boost but the seat of the pants feels good - time to recheck your boost sensor / vacuum leaks.
 
M

Mikedip7

New Member
Oct 27, 2017
6
0
1
Mar 31, 2019
#3
  • Mar 31, 2019
  • #3
Boost gauge is at a T by the fuel rail, I don’t think I have a photo at the moment. I’ll snag on tonight, and I don’t feel anything at any rpm. Also should I be hearing anything from the bypass valve?
 
You must log in or register to reply here.

Similar threads

Forced Induction Bypass valve backwards?
  • Dontknowchit
  • Jun 25, 2025
  • Fox 5.0 Mustang Tech
Replies
3
Views
330
Fox 5.0 Mustang Tech Jun 29, 2025
JD1964
9
WTB: Procharger or Vortech Supercharger – 1996–1998 Mustang GT 4.6 2V – Budget $3,200
  • 96mustang.gt
  • Nov 20, 2025
  • Want to Buy
Replies
1
Views
304
Want to Buy May 3, 2026
roblabsn95
R
Forced Induction Vortech bypass valve necessity
  • 92Rustang
  • Aug 28, 2024
  • Fox 5.0 Mustang Tech
Replies
2
Views
490
Fox 5.0 Mustang Tech Sep 2, 2024
Cheapskate207
G
2001 Mustang Gt
  • gilmo5
  • Sep 10, 2024
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
324
1996 - 2004 SN95 Mustang -General/Talk- Sep 10, 2024
gilmo5
G
0
V6 to V8 Swap info
  • 02_2v_Curtis
  • Jan 11, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
646
1996 - 2004 SN95 Mustang -General/Talk- Jan 11, 2026
02_2v_Curtis
0
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?