Quote:
Originally Posted by Bossxr8
The Barra still had plenty of life left in it. The DI engines could pass Euro 5 and 6. Actually I think they could pass Euro 5 with port injection as well. Just needed development to get them to be able to pass the tests over the 160,000km service life the tests require the emissions to pass for. Which involves a lot of work with oils, and certain additives like zinc they put in them. Zinc is good for part protection, but bad for cat convertors. So it was all a balancing act.
There was also the time they tried machining alloy barra blocks in the engine plant. The soft alloy wasn't good for the tooling. Clogged it up. Would have needed a lot of tooling changes for it to work. Can't use tooling for hard cast iron to machine aluminium.
There was also the prototype LPI Turbo ute that went like sheet off a shovel. Never got off the ground though. Just wouldn't have been enough demand for it.
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Zinc is an interesting one, no oils has high zinc content anymore except for a few specialist applications for oldskool cars.
A lot of VN-VS 5L with rounded hydraulic flat tappet cam lobes
