« previous next »
Pages: [1]   Go Down

Author Topic: Intake valve stem seals or not  (Read 4274 times)

Offline msundstrom

  • Full Member
  • ***
  • Posts: 119
    • View Profile
  • Your Best Time: 7.45 @ 182 in 1/4
  • Your Engine: NA Injected 505 BBC on 45%
  • Your Track: Woodburn Dragstrip
  • Your Vehicle: FED
  • General Location: Washington Coast
Intake valve stem seals or not
« on: February 10, 2015, 10:43:08 AM »
Intake valve stem seals or not on a NA iron head application. Have run with them both ways and have not seen any advantage or disadvantage as long as VS clearance is good. Experiences, observations?
Thanks
Mark S
Logged

Offline masracingtd1167

  • Hero Member
  • *****
  • Posts: 1110
  • bill masiello Shelton Ct.
    • View Profile
  • Your Best Time: 7.40's at 181 on motor 6.94 at 192 nitrous
  • Your Engine: 394 chevy
  • Your Track: Lebanon Valley Dragway
  • Your Vehicle: 2003 Neil and Parks
Re: Intake valve stem seals or not
« Reply #1 on: February 10, 2015, 02:42:01 PM »
I would say yes to using valve seals because it will help keep oil out of the combustion chamber that can cause detonation .
Logged

Offline wideopen231

  • Hero Member
  • *****
  • Posts: 1911
    • View Profile
  • Your Best Time: 1/8 3.70@ 198 1/4 5.78@245
  • Your Engine: Hemi 526 ci alcohol
  • Your Track: Piedmont
  • Your Vehicle: 225 CMC FED
  • General Location: NORTH CAROLINA
Re: Intake valve stem seals or not
« Reply #2 on: February 17, 2015, 09:05:18 AM »
Have never ran seals on race engine. Probably not worst idea just never have.
Logged
Relecting obama is like shooting right foot because it did not hurt enough when you shot left foot

Offline Frontenginedragsters

  • Full Member
  • ***
  • Posts: 202
    • View Profile
    • Pro-Formance Specialties
Re: Intake valve stem seals or not
« Reply #3 on: February 17, 2015, 05:43:11 PM »
Naturally Aspirated engines have vacuum on the intake side and will want to suck oil down the valve stem.
The exhaust side has lots of heat and pressure pushing the oil up and out of the valve guide.
I would put seals on the intake side and question seals on the exhaust side.

Matt
Logged
Driving a Front Engine Dragster builds character and keeps you awake for a 1/4 mile at a time.
http://www.pro-formancespecialties.com/
Pages: [1]   Go Up
« previous next »