Page 2 of 4 FirstFirst 1234 LastLast
Results 11 to 20 of 35
  1. #11
    Forum User
    Join Date
    Nov 2006
    Location
    London
    Posts
    884
    Quote Originally Posted by MAXIBOY
    Quote Originally Posted by final abode
    i havent got the spec of the cat cams , so ill just use the pipers and newmans in comparison.

    pipers : 264, inlet valve lift .390/9.90mm exhaust valve lift .362/9.20mm
    timing inlet 22-62 exhaust 58-18

    newmans: 264 inlet valve lift .420/10.66mm exhaust valve lift .420/10.66
    timing inlet 22-62 exhaust 62-22


    so the newmans is a slightly more aggresive cam?
    not sure as specs don,t tell you everything but the newmans have more lift so might make better power but thats only one aspect.
    Am I right in thinking, Another aspect is surely the exhaust timing - newmans delayed exhaust relates to more power in comparison to pipers?

  2. #12
    Forum User stan's Avatar
    Join Date
    Feb 2005
    Location
    Carlise/Swansea
    Posts
    3,230
    For the record Catcams dont do 264deg grind.

    As for comparing those to above, your only showing duration from 0.1mm....as I said to better see which is more "agressive" you need duration between another lift point...usually 1mm.

    yes, the retarded timing figures will aid peak power in theory, BUT we dont know how the profile compares, so you cant give a definative "yes this is better" answer.

    In any case, its always a pay off between performance and idle stability whilst your on the OE managment. Jays idles nice because the cams arent very wild, and the timing figures may have been altered to aid idle at the cost of peak figures.

  3. #13
    Banned
    Join Date
    Nov 2006
    Location
    Newcastle, North-East
    Posts
    411
    If you were wanting, to say, purchase the newman cams for example (264 dur) what else would you need to buy along with them?

    i.e. would you need the vernier pulley's as well and springs, etc.... or can you simply buy the cam shafts, put them in and away you go?

    I'm guessing you'd want to buy a new cam belt?

    Cheers.

  4. #14
    Forum User stan's Avatar
    Join Date
    Feb 2005
    Location
    Carlise/Swansea
    Posts
    3,230
    pulleys and belt.

  5. #15
    Banned
    Join Date
    Nov 2006
    Location
    Newcastle, North-East
    Posts
    411
    Quote Originally Posted by stan
    pulleys and belt.
    Ta.

  6. #16
    Forum User
    Join Date
    Sep 2006
    Location
    london, hackney Formally known as FINAL ABODE
    Posts
    360
    so how 'wild' a cam is and 'timing' are too seperate things.

    so u can go with a mild cam timed more aggresively or a wilder cam timed more conservatively, which set up would be better to go with?

  7. #17
    Forum User Scougar's Avatar
    Join Date
    Feb 2007
    Location
    West Devon
    Posts
    889
    One that is timed in right :D

    Matthew

  8. #18
    Forum User
    Join Date
    Sep 2006
    Location
    london, hackney Formally known as FINAL ABODE
    Posts
    360
    lol fair point , just trying to find out what factors affect what

  9. #19
    Forum User Scougar's Avatar
    Join Date
    Feb 2007
    Location
    West Devon
    Posts
    889
    When i say timed in right, I mean what is recommended by the manufacturer. Of course you can advance or retard depending on what you want, but it's normally best to stick to the setting recommended. Also... isn't timing in some way determined by the ECU on clio's? (timing of the spark I refer to).

    Matthew

  10. #20
    Forum User
    Join Date
    Dec 2005
    Location
    wales
    Posts
    6,306
    i would say a wild cam timed mild.

    if you have a mild cam timed wild thats your limit.

    if you have a wild cam timed mild you can always time it more aggressively when you get bored/track days/never


 

Similar Threads

  1. UNSILENCED DE-CAT PIPES ~~ STAINLESS OR MILD STEEL
    By cliorod in forum WilliamsClio Discussion
    Replies: 1
    Last Post: 21-01-2009, 11:41
  2. What Cam Duration Does Everyone Use?
    By cliolord in forum Performance/ECU Tuning
    Replies: 9
    Last Post: 26-10-2006, 09:00
  3. whats the lift/duration of standard willy cams?
    By bigjim in forum WilliamsClio Discussion
    Replies: 2
    Last Post: 20-06-2006, 23:51

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •