GTI cam for increased power

Discussion in 'Mk2' started by davidut5, Oct 14, 2018.

  1. HPR

    HPR Administrator Admin

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    Lobe centres are 110 on Inlet and 114 degree on Exhaust...
    Infact you could say its both on 112 degree and 2 degree advanced at the cambelt pulley > the inlet opens sooner and the exhaust close sooner
    Altough here the 2 degree advance has been been done on the cam itself ( location of the cam pulley )
     
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  2. davidut5 Forum Member

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    Okay so exhaust close was off by 4 degrees, it is negative two.
    First i have to fit the printed diagram with 0 to tdc, then align intake center at 110atdc on diagram, after finding intake center with a dial gauge. This should be good, maybe check the exhaust center too. :thumbup:
     

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  3. HPR

    HPR Administrator Admin

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    Dont worry, set the Inlet @ 110 and ignore the exhaust... as there is nothing you can change to the exhaust timing on a 8V...
    Its a base setting to start with, for best performance you can try some degrees advance or retard to find maybe a few extra pony`s > as long there is enough safe distance between valves and piston
     
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  4. Jon Olds Forum Junkie

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    maestro HPR, hits the nail on the head, as ever..
    Jon
     
  5. davidut5 Forum Member

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    I just checked the cam timing and i got 109* intake center. The 1 degree could be measuring error.
    Before i fitted a 4bar fpr checked the afr again and was 14.4.
    With the 4bar fpr top end 13.1, not a difference in power. Top speed 195km/h, so not much more poneys. Still about 8s to 100km/h.
     
  6. davidut5 Forum Member

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    Etka says connecting rods are same as 1.8t agu, so no problem to 200hp.
    I want more poweeeer, was thinking about mercedes superchargers. Used are about 140 euros, turbo is better but i have to replace my cheap 421 header and i just ot it.
    A piggyback ecu i can afford ecumaster det3 is 200e new. It does not support sequential injector firing.
    In all of this i have to keep the block and pistons as they are 0.5 over.
    SC might be fine with +0.6bar boost, but if i turbo it i fear i will destroy the engine by wanting more boost more poweeeee! Hehe, what a pandemic virus, covid-like!
     
  7. davidut5 Forum Member

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    When i replaced the oil pump i replaced the oil baffle from the 2.0 which has oil squirters, could this affect oil splashing cylinders to alter cylinder lubrication? The 2.0 oil baffle is bigger, covering most of the crank.
     
  8. HPR

    HPR Administrator Admin

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    It depend on what the car is being used for...
    If its a roadcar, both the large plastic from the 2.0L engine OR the ABF windage tray will do.... and avoid the crank is slamming into the oil
     
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  9. davidut5 Forum Member

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    Roadcar yes, piston noise keep increasing, thought i can blame on that.
    I believe the fuel pump might fail on me. While driving or idle afr rise to 17-18, started to judder a little, but if i floored it it would go down to 12-13. Did this 4 times today.
    Could be the o2 sensor as couple days ago i resealed the connection before the sensor, maybe sealant affecting it somehow.
     
    Last edited: Dec 28, 2020
  10. davidut5 Forum Member

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    Fitted the 3bar fpr and its worse when playing up, afr getting over 20.
    I unplugged the lambda sensor and so far ran fine. Did a fault scan, got lambda regulation upper limit, lower limit, no signal and implausible signal all of them intermittent. This was a new delphi sensor.
     
  11. rubjonny

    rubjonny Administrator Staff Member Admin

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    I only use Bosch make lambdas, never had any problems. you can use one of the universal types sometimes they work out cheaper sometimes not. LS03 is the universal code for your AGG, 021906265R is direct fit VW code
     
  12. davidut5 Forum Member

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    Thanks, problems started after i did some work on the exhaust. I will probably get the specific lambda, there is just 100lei/18gbt more than the universal bosch.
    Fitted a helmholtz resonator, a piece of 51mm diameter about 50cm long pipe before back box to reduce some drone, but no difference. Got to replace one straight through box with a chambered one, to reduce exhaust speed/noise.
     
  13. rubjonny

    rubjonny Administrator Staff Member Admin

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    is always worth looking out for the direct fit for sure, sometimes you can find a bargain
     

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