The Sabre is very heavy, 1150kg, but this is because it has been built for tarmac rallies (like your Targa Tasmania), and has to be extremely strong. Circuit racecars don't have to contend with trees, cliffs, lamp posts, rough roads, getting airbourne, etc, so can be built lighter. But it is still quick and competitive.
I've received a couple of e-mails from members about the dual intake system on the engine. Nothing particularly complex about this. You simply need two of the standard aluminium plenum intake chambers off the 1UZ engine, cut them both down the middle, and weld the two halves together ... voila, you have a dual intake manifold.
This system has served us well for the last 3 years, but has just been removed from the engine to be replaced by a new intake manifold utilising 8 separate throttle bodies. This, combined with a full engine rebuild and flowed & shaved heads, will give us another 25% more power over the existing engine setup.
Cheers, John