That made me laugh. Not at you Tim, but at the brash-ness of Mulleys question......MULLEY wrote:Is this a mid-life crisis mate???
Using Hiliary's mph/1000 rpm, then with the TD box, the TCT will be doing exactly the same rpm as the TD engine. e.g
at 50 mph in 5th the engine will be at 1901 rpm
at 70 mph in 5th the engine will be at 2662 rpm.
For an N/A petrol I'd say forget it and that was probably the thinking behind not using a TD box. i.e. all your tourque in a n/a petrol is 4000rpm ish (not knowing ANY modern petrol engine), where as the bx TD is 2500, which make acceleration in 5th from 70 pretty comfortable.
However, yours will be a Turbo Petrol, and so the TD gear ratio's are more favourable, however, I don't know what the power/torque curve of the TCT is, but my guess is the TD box will leave you a little sluggish from 50 (there's always 4th gear though) but probably otherwise ok.
The guys from romania mated a BE3 to the 2.1td, using an uprated clutch. I'm not sure about the flywheel but they clearly achieved a good outcome.
Using the overhead i/c is probably too small at my guess. You've got more flow and thus more heat to dispose of and I'd be very surprised of the TD inlet manifold will fit the TCT. You could of course get one made. If you search around the internet, there are various 'calculators' that will help determine the size of your intercooler, helping you decide if the TD I/C is sufficient.
At the least I'd say you need vented discs. The valver discs are common with early Xantia of the D and I think TD variety and as early Xants had 14" wheels they should fit behind standard BX wheels (don't know for sure). The Xantia calipers have a bigger piston, so more braking effort, but then you really ought to have stiffer spheres (TD/GTi spec i.e. 400cc) unless you're very sure to slow up well for the corners. The TD/16V anti roll bar should go in the front (what spec car are you putting this in?) and ideally a 16v anti roll bar at the back (although you'll need 16v rear arms or make a mod).