Posted 30 January 2009 - 07:19 PM
There are just a few things I have noticed here and a few of the old wives tales coming out again.
Firstly, there were no rule changes from L34 to A9X that allowed homolgation of parts, that was always the case and ongoing. The L34 engine was already homologated with the LH SLR5000 with L34 option. The A9X was officially an option on the LX SLR5000 or SS with the 5000cc engine fitted, the same as the L34 was officially an option on the LH SLR5000. The A9X was simply an evolution of the L34 option which meant better suspension and brakes (rear discs and the much better sailsbury diff). The T10 gearbox was also made a dealer fitted option (the same as the HO kit on an L34). NO L34 or A9X left the factory with HO kit or T10. The L34 in factory showroom spec was no rocket ship, in fact with the same 2.78 rear end as the LH SLR5000, it was actually slower over the quarter mile, thats a fact. It's great to put all the good bits in an engine, but when you choke it with a tiny intake for the aircleaner and reduce the exhaust down, well Holden achieved their aim of avoiding another supercar scare put it that way.
It's quoted in various books around the place the L34 and LH SLR5000 had exactly the same horsepower. It's also quoted that with the introduction of ADR27A, the LX SLR5000 lost power over the LHSLR5000. The LX SLR5000 and A9X are both quoted at exactly the same horsepower as well. If this is true, the A9X would have been down a little on power from the L34. By the time the A9X was released, the 308 block was the same as that used in the L34 and the crackshaft was improved over the L34 due to a series of failures. With this in mind it wouldn't take much to bring the power up and you now have a car that goes as well, handles better and pulls up better, thats what evolution is all about. Of course, the L34 engine did have all the good internals, so similar simple mods would make the thing really go in a straight line, and of course that baffled sump would be better in the corners.
As for the GMP&A shells not being an A9X, well the 33 rolling shells were a complete car except for the engine, gearbox and a few minor items. they had all the A9X suspension and rear floor pan mods, diff, brakes etc.
I'm not putting the L34 down by any means, just stating some facts.