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bogcock

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Posts posted by bogcock

  1. I've got a rb20det turbo laying around but not willing to waste it on this experiment, as I don't feel ceramic turbines fail from wheel speed alone.

    thats your perogative mate.

    i know for a fact that the egt is the cause and all i was doing was offerring a chance to prove it to you all

  2. and if anyone has a spare ceramic wheel and shaft lying around, send it to me and i will put it into my machine and spin it up to 300,000rpm and leave it for 10 min at that rpm, then i will apply heat for 10 min with the assistance of an oxy torch with accetelene bias so as not to melt the thing.

    open to offers. i will record the findings on video

  3. Actually I won't accept it unless you provide the physical evidence and a significant enough sample.

    You said the shaft expands, not the shrink fit of the turbine onto the shaft causing excessive hoop stress.

    Methinks you are not an engineer at all and have decided to run and hide.

    I have not heard of one rupturing off boost.

    i never once said they will throw a wheel off boost, i said the damage occurrs during that period. the wheel will throw once spooled.

    thankyou for the comments, but not good enough im afraid ;)

  4. poncams are good because they use the stock valvetrain.

    if you want big power you will need more lift and around 264 duration..

    procams are better, but you need to change valve springs, retainers etc

    for a stock gtr (internally) cams wont really give too much benifit. ive seen stock cammed gtrs running 600hp with no problems. attend to other parts 1st, such as turbos, ecu, injectors zorst etc

  5. depends on the setup.

    usually more lift = more flow, but you also need duration. the problem lies in getting a good combo as at high rpm you can get valve slap, eg over revving. to compensate you can use tougher valve springs etc. but it depends on the lift. if the lift is more than the springs can take the springs will bind, or over compress.. VERY bad.

    if you need high revs eg nat asperated, you need less duration more lift... to raise the rev range

    use as a guide as this may not be correct to some out there ;)

  6. whats the point of a radar detector. if your speeding, adn you get picked up by radar, the coppers allready know ur speeding, so whats the radar detector guna do for you???

    it detects the radar emissions once they hit the car. TOO LATE!!!!

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