Originally Posted by
johnandhissaffy
when driven hard they heat up quickly and power wise all you can do without much fuss is air filter and a good old service really and imo if ya going to turbo it then i would just 24valve it instead will be much cheaper than turboing it and youll have 200+ bhp stight away witch is loads when ya only on a na
24v and a turbo is best, the dohc is a bit head gaskety
Originally Posted by
cozmeister
What you meant to say is "You won't get much
more power out of that engine
easily 
But you're right in as much as they weren't popular for tuning because there were plenty of Pinto and YB engines with tuning options available at the time - the poor I4 was overlooked.
cos its wank
they are like massey ferguson engines thats why
Originally Posted by
boy-racer-1
isnt the rs2000 cylinder head a good ungrade for the twin cam?
Lol, thats makes it an rs2k engine then