Phenolic gasket

Discussion in 'Engine' started by Dieselman, Aug 23, 2008.

  1. Dieselman

    Dieselman Banned

    Messages:
    34,206
    Joined:
    Jul 13, 2003
    Car:
    Peugeot 403 Convertible
    When doing the exhaust the other night I checked a few temperatures around the engine and was surprised to see the intake manifold was the same tempreature as the cylinder head due to thermal conduction through the gasket.
    As it seems a shame to cool the charged air down with the intercooler, then heat it back up again with the manifold I wondered about making a manifold gasket from phelonic material as this should reduce conductivity by 200-1000 times depending on thickness, thus reducing the charge air temperature and cylinder filling for the same, or actually slightly less boost pressure.

    Does anyone know of a supplier for small pieces of phelonic board (or similar thermal insulant), and even someone to do the machining.?

    TIA.
     
  2. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

    Messages:
    16,400
    Joined:
    Nov 29, 2002
    Location:
    Nuneaton Warwickshire
    Car:
    Lots of Mercedes!
    lol only you!!

    on a serious note though, how much difference would it actually make if the air were that little bit cooler. Does the air actually get heated up that much between the intake and engine by the temperature of the actual manifold?
     
  3. Bobby Dazzler

    Bobby Dazzler MB Club Veteran

    Messages:
    15,344
    Joined:
    Jan 21, 2005
    Location:
    Mittel England
    Car:
    ML AMG-line Black Series
  4. OP
    OP
    Dieselman

    Dieselman Banned

    Messages:
    34,206
    Joined:
    Jul 13, 2003
    Car:
    Peugeot 403 Convertible
    Ha ha. not sure what you mean...:eek: :p
    I also measured the exhaust manifold temps for each cylinder and found they were all within 2c of each other at idle and checked the radiator temp against the dashboard temperature gauge, all using my non-contact IR thermometer...:D

    Next time anyone goes out in their car place your hand on the intake manifold, you'll be surprised how hot it is.

    As far as power gains I'm not sure on the diesel but on petrol engines it seems to be about 7-bhp and 11-Ft/Lbs of torque.
    It's also about reducing the charge air to reduce combustion temperatures.

    Plenty of intake air is good, but cold air is better...;)
     
  5. OP
    OP
    Dieselman

    Dieselman Banned

    Messages:
    34,206
    Joined:
    Jul 13, 2003
    Car:
    Peugeot 403 Convertible
    Thanks Bobby. Fancy giving it a go.?
     
  6. Bobby Dazzler

    Bobby Dazzler MB Club Veteran

    Messages:
    15,344
    Joined:
    Jan 21, 2005
    Location:
    Mittel England
    Car:
    ML AMG-line Black Series
    On mine? Whilst I'm under warranty I've been keen to keep it standard.

    If I keep it beyond the warranty then I've considered doing a few things. Both of those tuners have a whole heap of goodies for the C32 now at remarkable prices.

    Compared to say two years ago where it was Kleemann or Brabus and megabucks it's a revelation.

    Whilst I've never dealt with either of them, I know their reputations from the US forums and they're a bunch of thoroughly good blokes based on what I've read.
     
  7. Uberwagon

    Uberwagon Hardcore MB Enthusiast

    Messages:
    753
    Joined:
    Jul 29, 2006
    Car:
    1991 500E
    Some big power cars use carbon fibre intakes for this very reason, a Norwegian Escort Cosworth producing over 800hp was the first I saw it on.

    Dave!
     
  8. Defiant

    Defiant Hardcore MB Enthusiast

    Messages:
    197
    Joined:
    May 12, 2008
    Location:
    glorious Galt CA
    Car:
    2003 C320 Coupe\71 220 gas, 4-speed\95 Talon TSi AWD\97 J30\79 GS1000S\80 SR500\'69 Datsun 2000
    You must keep in mind that the exposure time for the incoming air charge is only fractions of a second. The effect of having a cooler manifold would be infinitesimal.
     
  9. Uberwagon

    Uberwagon Hardcore MB Enthusiast

    Messages:
    753
    Joined:
    Jul 29, 2006
    Car:
    1991 500E
    Not true, it will make a surprising difference to the intake temp, air goes through a radiator incredibly quickly but still picks up a lot of heat.

    Dave!
     
  10. grober

    grober MB Club Veteran

    Messages:
    26,485
    Joined:
    Jun 22, 2003
    Location:
    Perth, Scotland
    Car:
    W204 C200CDI Estate
  11. Adam230K

    Adam230K Hardcore MB Enthusiast

    Messages:
    3,087
    Joined:
    May 1, 2007
    Car:
    German oil burner
    diesel... you're mental
     
    Last edited: Aug 27, 2008
  12. W210 Fan

    W210 Fan Hardcore MB Enthusiast

    Messages:
    1,434
    Joined:
    Nov 16, 2005
    Location:
    Godalming
    Car:
    W140 S500L W208 430
    Try this lot;

    http://www.aquariusplastics.co.uk/

    they laser cut some plastic for me before, same as steel laser cutting but you need fume extraction, would probably be able to source that material as well, you may need CAD data for them, if you supply me with a new gasket I can transfer it for you, they may be able to do it themselves...
     
  13. Number_Cruncher

    Number_Cruncher Hardcore MB Enthusiast

    Messages:
    987
    Joined:
    Jan 14, 2008
    Location:
    Midlands
    Car:
    1995 E300D
    How hot is the air leaving the intercooler?

    How hot is the coolant / cylinder head / inlet manifold?

    How much heating actually takes place in the manifold?
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.