I've just aquired an early 205GTi and a 205Si and am trying to figure out the right spec for the GTi engine. The car is too far gone to be a showroom restore, but should be heaps of fun if sorted right.
This will be a road car not a track thrasher.
Since I have both the GTi engine and the Si unit, I have some options. Just put the Si head on the GTi engine to lift the compression ration or add the Si pistons toraise the CR even further.
Who has any experience with these options, and what cams have proven successful in any of these combinations? Slightly longer term, the engine could wind up with throttle bodies and a Haltech Sprint500 or similar.
In the short term, I'm about to pull the Si head and give it a going over as it will go in the GTi regardless.
Look forward to your advice.