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  • 1996 - 2004 SN95 Mustang -General/Talk-

Valve springs required to cam your 3.8 v6 [ part info inside ]

  • Thread starter Thread starter 98Mustang2017
  • Start date Start date Jan 5, 2020
9

98Mustang2017

Active Member
May 3, 2017
162
16
38
ct
Jan 5, 2020
#1
  • Jan 5, 2020
  • #1
Sharing my experience and research to lead the way.

If you want a camshaft for this engine it is worth getting a set of these dual valve springs :

https://www.summitracing.com/parts/crn-99838-12

Why? Because your stock cam has a lift of .432" already and the stock valve springs can barely tolerate .480. That is no power difference to be noticed.

Those dual valve springs are rated up to .690" Lift but you should keep it at a max lift of .640 to keep things from breaking due to Coil Bind.

--
Along with the springs you should include with that the steel valvespring retainers.

https://www.summitracing.com/parts/crn-99957-2/overview/
Why? Because the stock retainers don't quite cover the whole valvespring and plus the spring has more pressure. You don't want anything to break or bend under high load and RPM .
 
J

johnjamesmiller

New Member
Oct 8, 2020
1
0
1
Nebraska
Oct 8, 2020
#2
  • Oct 8, 2020
  • #2
Did these springs require machining the head?
 
V

V6manwiththeplan

New Member
Oct 20, 2020
1
0
1
United states
Oct 20, 2020
#3
  • Oct 20, 2020
  • #3
98Mustang2017 said:
Sharing my experience and research to lead the way.

If you want a camshaft for this engine it is worth getting a set of these dual valve springs :

https://www.summitracing.com/parts/crn-99838-12

Why? Because your stock cam has a lift of .432" already and the stock valve springs can barely tolerate .480. That is no power difference to be noticed.

Those dual valve springs are rated up to .690" Lift but you should keep it at a max lift of .640 to keep things from breaking due to Coil Bind.

--
Along with the springs you should include with that the steel valvespring retainers.

https://www.summitracing.com/parts/crn-99957-2/overview/
Why? Because the stock retainers don't quite cover the whole valvespring and plus the spring has more pressure. You don't want anything to break or bend under high load and RPM .
Click to expand...
Did you use the stock valve locks?
 
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