« previous next »
Pages: [1]   Go Down

Author Topic: Copper head gasket  (Read 5180 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
Copper head gasket
« on: January 05, 2015, 09:32:12 AM »
Are there any issues good or bad with having more or less exposed copper to the non quench areas (combustion chamber)? With a smaller ID gasket does the smaller quench area have any effect on combustion efficiency and power?
Thanks
Mark S
Logged

Offline Frontenginedragsters

  • Full Member
  • ***
  • Posts: 202
    • View Profile
    • Pro-Formance Specialties
Re: Copper head gasket
« Reply #1 on: January 06, 2015, 03:47:30 PM »
 Hello Mark:
You don't want the head gasket hanging into the bore if it's going to hurt airflow around the valves.
How much is hanging in the bore?

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/

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
Re: Copper head gasket
« Reply #2 on: January 06, 2015, 04:35:00 PM »
None would be overhanging the bore, bore is 4.350". If I use a 4.380" gasket it will have about .060" copper exposed at the spark plug side of the combustion chamber (BBC iron head). If I use a 4.520" gasket it is right at the chamber edge. The difference is .16 CC's, I know it's not a lot but would like to have it. Would the exposed copper be a possible preignition spot?
Thanks
Mark S
Logged

Offline Frontenginedragsters

  • Full Member
  • ***
  • Posts: 202
    • View Profile
    • Pro-Formance Specialties
Re: Copper head gasket
« Reply #3 on: January 07, 2015, 04:59:07 AM »
 Mark:
I don't think that would cause a problem.

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/

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: Copper head gasket
« Reply #4 on: January 14, 2015, 06:17:03 AM »
risk vs reward. If you think there is slimmest chance that the exposed gasket might cause detonation and you are gaining very little.  Why chance it? Plus if your looking for more compression what thickness gasket now,can you get thinner if buying anyway? Plus return on higher compression is minor,especailly the higher you get.

Maybe cleanup are that will be exposed and met in the middle?
Logged
Relecting obama is like shooting right foot because it did not hurt enough when you shot left foot
Pages: [1]   Go Up
« previous next »