The 8v camshaft thread.

Discussion in '8-valve' started by Phil., Nov 2, 2006.

  1. Phil. Forum Junkie

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    Thanks for the reply smudge, that's exactly the reply I was looking for :thumbup:

    Was that you I was talking to last week in ECP and Halfrauds? Or the fella that used to live just around the corner from me?
     
  2. mr hillclimber Club GTI Supporter and Sponsor

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    The cam I mentioned earlier in the thread has the following figures if it's any help...

    32-72 / 72-32 with 284 deg's duration & 0.470 (11.93mm) valve lift. It's a hydraulic profile.

    A GS2 "H" (which is what you'll need for a Hydraulic 8v) is 25-65 / 65-25 giving 270 deg's duration and 0.446 (11.32mm) valve lift.
     
  3. Phil. Forum Junkie

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    thanks hillclimber, some good info there.

    Now I think I'm even more confused though.

    Should I go with a bit of a wilder cam (innit) or stick with an everyday 268 schrick or even the GS2 270.

    With the spec mentioned, what would you go for? Bearing in mind it's not a solely a track car.
     
  4. Lhasa2008 CGTI Regional Host

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    I would DEFINATELY recommend the Kent GS2H.:clap:

    My MK2 8v daily runner has an AGG 2.0 bottom end on a TSR pack 'A' PB head, and GS2H cam.
    It's been rolling roaded at 145bhp and 145 lb/ft. Plenty of low down torque, and stays like that all the way to 6000rpm.
    (Enough bhp and torque to kill a standard clutch though [8(] )

    Very easy to drive. Lots of fun! :)

    HTH

    Lhasa2008
     
  5. TheSecondComing Forum Addict

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    GS2H are great, but I'd have a Newman cam over it any day........ My old 8v (ex MarkD) had one, with a VERY mildly polished head and the AFM richened up a bit - it was a right screamer.
     
  6. Bundles Forum Junkie

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    Any idea which one though? :)
     
  7. mr hillclimber Club GTI Supporter and Sponsor

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    As a Guide if it helps....

    STD 2ltr 8v MK3 (all figures at the wheels)

    2000 - 37hp
    3000 - 60
    4000 - 76
    5000 - 88

    Modified MK1 1900 STD Hyd cam

    2000 - 40
    3000 - 60
    4000 - 76
    5000 - 96
    5500 - 98
    6000 - 90

    Modified MK1 1900 with GS2 "H"

    2000 - 34
    3000 - 60
    4000 - 79
    5000 - 102
    5500 - 108
    6000 - 104

    Modified MK1 2ltr with 284 cam (specs earlier in the thread)

    2000 - 42
    3000 - 68
    4000 - 101
    5000 - 123
    5500 - 131
    6000 - 126

    The 2ltr is going to be better low down than the 1900 but the longer duration cam worked well right through the rpm range and certainly gave no loss of low end power when used with a modified head, tubular exhaust manifold and performance system when compaired to a std 2ltr 8v. On the road it pulled very well.

    Anyone got any figures with Newman cams fitted ?

    Though looking at the cam specs I'd have thought the the 268 Newman to give "slightly" less than a GS2 and a 272 Newman "slightly" more, but there cant be much more than couple of hp in it, if that. The Newman's may have better valve acceleration so could feel more responsive that way, all the above would be good road cams though.
     
    Last edited: Nov 4, 2006
  8. Bundles Forum Junkie

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    That's prefect mate, CHEERS!
     
  9. mr hillclimber Club GTI Supporter and Sponsor

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    Just to see it all on screen together...

    Newman 268 Timing - 24-64 / 64-24 Duration - 268 lift - .420 (10.66)

    Kent GS2 "H" Timing - 25-65 / 65-25 Duration - 270 lift - .446 (11.32)

    Newman 272 Timing - 26-66 / 66-26 Duration - 272 lift - .448 (11.37)
     
    Last edited: Nov 4, 2006
  10. Phil. Forum Junkie

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    I think Ill be going for a Newman 272 then.


    Top info there hillclimber :thumbup: thanks.
     
  11. TheSecondComing Forum Addict

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    No idea, it came with the car and was a regrind rather than a fresh one (making it, I think, an oldish cam) - and I've since sold both it and the head! Might be able to get any numbers off it from the fella I sold it to though, he hasn't got round to installing it yet.....

     
  12. Admin Guest

    Sorry wrong Phill - I ment philip walker. [:$]

    IMO the Newman 272 is the best choice of cam for your application and you can get one for 150, far cheaper than the Kent or the schrick plus it has the same profile as a schrick anyway. [:D]
     
  13. TheSecondComing Forum Addict

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    That'd be my choice.......
     
  14. mr hillclimber Club GTI Supporter and Sponsor

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    No probs...

    I think I'd go that way as well (Newman 272) for a car used mostly on the road in day to day traffic. If it was'nt used so much in heavy traffic I'd use the 284 spec cam we had ground or maybe even a Kent GS3"H" (not to be confused with a GS3 profile for a solid lifter head)... both have similar timing figures... the 284 cam had plenty of low end grunt (dyno figures above) and the old TSR 282 cam that Mike uses appears to have a very similar power spread.

    A 2ltr will pull the hotter cam with no probs but if your starting out still as an 1800 then the tamer cams would be the wise choice.
     
    Last edited: Nov 6, 2006
  15. Cam Man New Member

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    Just a quick note. Newman Cams Golf cams are NOT copies of Shrick Cams.
     
  16. Lhasa2008 CGTI Regional Host

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    Has anyone on the list experience of the Newman 288 cam for a MK1 with a 2.0 BVH[:?:]

    On paper it looks like a good compomise between a fast road and a race cam.:)

    TIA

    Lhasa2008
     
  17. supercharged999 Forum Member

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    i am running a mk2 8v with 2l bottom end.BVH etc. with 276 NEWMAN CAM.
    PRETTY LUMPY :clap: but easily drivable in traffic.

    had a KENT 266 before, very nice and smooth, but no kick...
     
  18. mr hillclimber Club GTI Supporter and Sponsor

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    Looks like a good cam. I'd imagine it to be a bit lumpy on idle but a good strong puller (ooh err !).

    Just looked back through, never did give you this info did I... [:$]

    Duration - 284 Timing - 32/72 - 72/32 Lift .470 (11.93mm)

    Power figures from a 2ltr Mk1 with this cam are further back in this thread.
     
  19. Razzer Forum Member

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    Hi
    does anyone recognise these camshaft markings on 8v
    Thanks

    [​IMG]
     
  20. Razzer Forum Member

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    Thankyou
     

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