|On Wed, 18 Feb 2004 16:27, Cully Paterson wrote:|
> > Don't forget - it's NOT a performance engine, and by
> > reputation not very good
> > at being turned in to one without a LOT of work.
> Well, reputation aside, here's a few things:
> - They're running 6 bolt mains, just like the Lexus V8. Unless they're
> really screwed the pooch the bottom end should be totally bulletproof.
> - They 'only' make 280HP out of 5 litres. Think how mild those cams are!
> - I've seen videos of them starting engines with martini glasses balanced
> on top of them, and the liquid barely moves in them.
Yep, that's the point - they are very designed for smooth cruising and stump
pulling, not exactly for high performance - zero cams, and small valves.
Of course, being map also, there is no way you can just throw in a better
cam :) (yes, I know that you know this cully ;) others probably don't)
I believe there is a LOT of engineering in these to make them even moderately
fuel economical, hence small valves and I would imagine a very high swirl
chamber with a lot of compression, which all leads to a poorly flowing head,
great for low end torque and fuel economy, not so good for performance.
> This has to be a seriously finely engineered lump. Sure, if you're trying
> to make them perform then you'll have to get down and dirty and actually DO
> something to them, rather than the typical approach of trying to bolt stuff
> onto the engine until it makes some power. But then again if you're afraid
> of doing things to engines you should go back into the lounge and put Fast
> N Furious on loop play...
Yes, very much so, it would be a great BASIS for a very good engine I