Alternative power-plants and transplants (GTi, Porsche, Subaru, Audi, diesel etc). Discussion and Q&A last answered over 2 years ago.
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I built my 2.1 with an eagle cam from the states (Check cb performance USA), duel twin 40 dells and merged header.
Dyno'd at just over 120hp, the bug absolutely flys!
Have a look on this site, plenty of wbx tuning to salivate over: http://www.shoptalkforums.net/viewforum ... f2151a73e9
Doing the scooby conversion is prob as easy and costs the same as getting good power from the wbx.. (the sccoby will prob have better power and mpg still though) there are very little parts off the shelf for the wbx... the saving grace is a cam change is poss as its type 1 based although I am not convinced that certain ones are much different from the stock 2.1 cam (its quite racey compared to a stock type 1 cam) but lifters become an issue and you MUST fit better oil cooling for reliability..
Now.. there are a lot of other things to think about in there too.. how do I know? well coz I am building a couple of upgraded wbx at the mo (2.1 and 2.2).. and the plan was to offer a version for sale.. if demand is high enough.. but IMHO to do it right so it lasts a long time does in fact mean more investment.. (I am sure there will be someone along to flame that of course )