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Exaust and backpressure

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  • #46
    point taken VanKronenburg ... my personal favorite is the BP-ZE mazda head ... not to sure if we get the "Opel" 20XE around here ..note however that the local market "Holden" 4 cyl s are rebadged Opel cars

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    • #47
      that would prob be the holden astra engine yes>?
      VW: it aint just a car, its a way of life
      There are few things more satisfying in life than finding a solution to a problem and implementing it
      My Blog: tinkererstales.blogspot.com.au

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      • #48
        yep they are, we have a holden barina, thats rebadged as opel, it has an opel engine, at least its european

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        • #49
          16v info

          Was searching for extractor info, but this is a good post about 16v head porting.
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          • #50
            This is very interesting stuff on the 16v heads indeed but the topic started out on extractors for an 8v. Maybe we would all benefit from a new topic on modifying 16v motors and tuning such. I am very interested and you guys obviously know your stuff and have a lot of experience with them.
            (Me???) I know how to snap exhaust cams on them!!!!
            Par 6 Golf GTI. Coilovers, BBS CH Wheels, APR'd
            Caddy van 05/07 (colourcoded) (BRIGHT! orange!) coilovers, Konis 18in. wheels, Oettinger tuned

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            • #51
              just read this thead my 8v was running
              straci's and 2 n 1/4 with hot dog n muffler
              but has big cam and big valves they nearly
              touch. found the exhaust to be good from
              the 1 n 3/4 that it replaced.

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