• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

GT40-P: Are new valve springs needed?

  • Thread starter Thread starter osprey2020
  • Start date Start date Mar 21, 2004
O

osprey2020

New Member
Mar 9, 2004
14
0
0
Mar 21, 2004
#1
  • Mar 21, 2004
  • #1
Hey
Will I need new valve springs in my GT40-P's if I run a Prefomer or Trick Flow #1 cam?
Thanks to all that reply.
 

IndyBlk5.0

New Member
Nov 24, 2003
1,122
1
0
New Whiteland, IN
Mar 21, 2004
#2
  • Mar 21, 2004
  • #2
rule of thumb, if the cam has over .500 total lift, you will need upgraded springs (preferrably matching) to be safe....
 

thumper460

Founding Member
Jul 24, 2000
3,022
2
56
Orange Park , Fl
Mar 21, 2004
#3
  • Mar 21, 2004
  • #3
Change the springs, as indyblk5.0 suggested!! Cool??

Just me............................

Thumper
 
O

osprey2020

New Member
Mar 9, 2004
14
0
0
Mar 21, 2004
#4
  • Mar 21, 2004
  • #4
tHANKS: ANY FEEDBACK ON THE PREFORMER SPRING KIT

HI
THANKS FOR THE REPLYS DO ANY OF YOU HAVE EXPERINCE WITH THE PREFORMER SPRING KIT? SEAMS LIKE A GOOD DEAL.
THANKS
 
You must log in or register to reply here.

Similar threads

Engine Hiccup at full throttle
  • keel
  • Jun 2, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
31
Views
631
Fox 5.0 Mustang Tech Yesterday at 8:50 AM
keel
T
Oil burning on my recently buil 302
  • The blk67
  • May 15, 2026
  • Fox 5.0 Mustang Tech
Replies
3
Views
159
Fox 5.0 Mustang Tech May 15, 2026
Noobz347
X
Engine Brackets for Gt40 heads with ac and ps?
  • Xavierg208
  • Nov 14, 2025
  • Fox 5.0 Mustang Tech
Replies
9
Views
394
Fox 5.0 Mustang Tech Nov 16, 2025
limp
9
Engine Donor '00 Mountaineer meet '91 Fox
  • 91firecracker
  • May 11, 2026
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
41
Views
917
Fox 5.0 Mustang Tech May 28, 2026
91firecracker
9
J
Engine Tuning...?
  • justadude07
  • May 30, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
216
Fox 5.0 Mustang Tech Jun 6, 2026
Blown88GT
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
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?