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No 2.3L on the ZL1, and I used what weights I could find from the same source. For some reason, GM doesn't publish the weight of the LSA on their website...so like I said, that was the weak link in the calculation, but I erred on the side of caution. May I ask where you've acquired the 550lb number?
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No 2.3? that sucks.. Anyway, the LSA's engine weight was discussed on the Caddy forums along time ago.
http://www.cadillacforums.com/forums...009-cts-v.html The official engine weight of the LSA is 467lbs (which is really heavy) undressed and without plumming/exchanger. There was a build being done last year and the engine weighed 544lbs dry but I cannot find the site again (and it was on a scale) I will dig up the discussion about the LS9 weighing 529.9lbs ready to run.. I just need to look into it alittle more. Heres the PDF on the marine LSA weighting 467lbs dry with no auto dress, plumming or exchanger.
http://www.gm.com/experience/technol...LSA_Marine.pdf
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I'm not certain we're thinking of the same type of system. You seem to be referring to a "hybrid" electric-hydraulic power steering system, where I'm 99.9% sure the ZL1's is a full-electric assist. The entire hydraulic system is replaced with a small motor used to assist steering effort. It removes the traditional power steering pump altogether and all of the fluid that goes with it. I completely guessed on the number, but it does save weight in addition to better fuel economy.
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Yeah, EPAS or EPS is an electric motor operating the power steering just as the belt formerly did. You are correct, this is
not the old electric hydraulic, it is literally the same thing the traditional rack/pinion except the electric motor powers the device. As you can see, the power steering pump is no more. The old pumps were heavy, the new ones were alot lighter. Between 18-25lbs I would guess, I see some of the newer pumps around 11-14lbs wet.
Lemme look for that LS9 weight. Both the LSA and LS9 weights are hush fully dressed but there are people that have weighed them...