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ZeroH

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About ZeroH

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  • Present cars
    BMW 328iS, 996TT X50
  1. Just digging this thread up again as today I had another cylinder leakdown test done on my car before I have it tuned. Given that the opc in January gave me such high readings I wanted to double check them before mapping it. The test was done by a well known porsche specialist and the results they got were cyl 1 3%, cyl 2 2% cyl 3 4% cyl 4 2% cyl 5 2% cyl 6 2%.... these compare to results of up to 12% gained by the opc in January. Assuming that the specialist results are correct, would you consider that these differences are within an acceptable tolerance? r would you say that more likely the opc results are null and void and maybe have a word with them about how they obtained their results ??
  2. Not quite sure what you are saying here... you think I need to set money aside because you think these numbers are so bad I'm looking at some serious engine work down the road ?? Do you have any experience of these numbers leading to such an outcome ? I think you are fine, but what happens when you "start tuning the car" and put the engine under additional stress? What happends to those leakdown values then? All I was saying, is if I were looking to buy a car, and did a PPI and got your values, I'd take a pass and look for another car with a narrower range from the leakdown values. OK right, so all you wanted to say is that you wouldnt buy my car based on its leakdown values !! Thanks, i'll take you off my buyers list then... :rolleyes: Seriously though, I have spoken to someone who is mechanically minded who says that if you split the left cylinder bank, 4/5/0, you get a max difference of 5%, and on the right bank 7/12/10, a max difference of 5% ... Hence there is at least consistency here and nothing to be worried about.
  3. Not quite sure what you are saying here... you think I need to set money aside because you think these numbers are so bad I'm looking at some serious engine work down the road ?? Do you have any experience of these numbers leading to such an outcome ?
  4. OK so just had my values back, 4%, 5%, 0%, 7%, 12%, 10%. OPC advises that these numbers are fine (only >30% should I be worried they say !) and no issues to worry about. Clearly I have a few values >5% however, so do you think that this is still acceptable / healthy ? Seperately I'm advised that I have "idle loss adaption" of 199% (value should be 4%) so air is leaking from somewhere... this needs investigation !
  5. Thanks v much ! I understand also that its important for consistency across the figures, i.e. you want them to be as close as possible to each other ?
  6. Hi All, I'm having the coils and sparks done today by my local opc on my 03MY 996tt x50, and have requested a cylinder leakdown test at the same time. Can anyone advise what are decent pressure loss figures that I should be looking for, and has anyone done a similar test and can post numbers so I have something to compare against. I wanted to get a snapshot of my engines health before deciding to tune it (currently car is stock with 33k miles) Thanks v much !!
  7. Thanks Loren - are the GT2 coilovers adjustable for compression and rebound ? Presumably then the x73 set up is similar to the GT2's stock setting with the advantage that the GT2 can be adjusted depending on use from therein, thus if a GT2 owner wants a more compliant ride he can adjust accordingly ?
  8. Hi Guys, I have an X50 with factory X73 suspension and would like to know whether or not anyone knows how x73 differs from the stock suspension on the 996GT2. I understand that the GT2 is 20mm lower than the stock turbo (RoW suspension) which is the same as x73, hence I wonder whether they are the same. I don't believe x73 is adjustable tho, whereas the GT2 is I think. Can anyone confirm ? Cheers.
  9. Hello all.... Nice summary by fastboydave, i'd also add that at 50k miles you may be looking at regular wear and tear on suspension components, I had to replace my front strut bump stops at 30k miles on my x50, although it is running x73 suspension and driving around potholed british roads so not sure if that had anything to do with it.... ! Have known wheel bearings to go also, but you cant miss the distinctive whining sound.
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