Talk:Chevrolet Cosworth Vega

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Aluminum block?

I don't care what propaganda De Lorean and GM circulated about the hi-Si block or "200 hour stress test" (I think this is a lie)-- All aluminum-block Vegas had to eventually get steel liners or iron blocks after 40,000 miles or so. ALL of them--they would pump oil like crazy. I don't believe you can make an aluminum block that will withstand the abrasion of iron piston rings, period. I don't care if Bum-W or Merce "say" they licked the problem--I don't trust it. I've seen poor evxamples of high-priced BMW's and M.Benz's, too, no make is above making a lemon now and then. Plus, unless very thick-walled, Aluminum blocks/cranks tend to warp, something cast iron cannot do--it will crack, however. It gave all Vegas, twin-cam or No, a bad reputation . Even with this retrofitting, ordinary Vegas were only so-so.

Also, Cosworth Twin Cam varieties were way too expensive--only $900 less than a Corvette Stingray, with Real engine? It wasn't "limited production" that made such a small production run, it was poor sales.

The fact they weren't made very long and you don't hear about them anymore is a clue they weren't any good. They don't have a race track reputation like an A/C Cobra or something. Possibly a Titanium block would do--but the cost would have been enormous. Why did Chevy try this, anyway? No aircraft was built without an iron block/crankcase or liners. Not even the Rolls-Royce Merlin, which had replaceable liners especially to aid overhauls. And, aircraft have to go 5,000 hours before rebuilds--at, say, an average air speed of 120 knots, which is a bit slow for a plane, that's 600,000 road miles. 68.231.184.217 (talk) 14:56, 19 May 2011 (UTC)[reply]

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