18 responses

  1. sean
    April 25, 2013

    Why no ptp internals?

    Reply

  2. Faeker
    April 25, 2013

    Because John

    Reply

  3. C. Jason Arteago
    April 26, 2013

    Great info!!! Especially for one that may be needing to go this direction shortly. It will be interesting too see how each internals hold up to the pressure and which, for now, comes out ahead!!!

    Reply

  4. Koenig
    April 26, 2013

    I’m curious to see how it all holds out. Especially considering Autotech has yet to do a “revision” and KMD has already 4 or 5. I couldn’t find anything but I don’t think CP-E has done any revisions either.

    Reply

  5. Johnny_Law
    April 26, 2013

    Can you also test the increased load placed on the pump cam follower that is a result of the increased APR spring pressure? I know the higher pump displacement is the primary increase in resistance, but I was just wondering how much added pressure is supplied via the stiffer spring on such a small surface area.

    On many direct injected engines the cam follower between the cam and the pump wear at an accelerated rate. This results in larger wear particles which are not always caught by the oil filter or are unfiltered when in bypass mode and seem to tear up the bottom end bearings as noted in UOA’s. It is also noted in the following PP Presentation around slide 29:

    http://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1024&context=auto_pres&sei-redir=1&referer=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3B_ylt%3DA0oG7kEX5XpR_l8AwmhXNyoA%3Fp%3Ddirect%2520injected%2520cam%2520follower%2520%26fr2%3Dsb-top%26fr%3Dyfp-t-900#search=%22direct%20injected%20cam%20follower%22

    Reply

  6. Tony magana
    May 7, 2013

    So when did CPE started out sorting there fuel pumps I got mine almos 2 yrs ago and I believe it was done at CPE. I might be wrong just wondering

    Reply

  7. Nate
    May 7, 2013

    Kmd and auto tech reuse the factory spring, APR is no different.

    It would be interesting to see if the spring rate us higher on the apr.

    Reply

  8. Don
    May 8, 2013

    awesome info plz do a dyno comparison and long term update!! i am in need of a HPFP but i just haven’t made up my mind yet.

    Reply

  9. Will
    May 18, 2013

    whens part 3 coming?

    Reply

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