Tuesday, December 18, 2012

Answers about the "Cadzillas"....

Had some inquiries as to why more people don't make the 472 / 500 Cadillac V8 swap. Yes, anything with 472 / 500 cubes is going to have massive low-end torque-like 500 lbs ft at 2,700 rpm. But other than the cubes and low-end grunt, your not going to get anywhere near the performance offered by the big-inch offerings of other GM divisions or Ford and Chrysler. There's a couple reasons why-the main one being that they are not high revvers. And I don't mean that they won't go 8 grand like a 427 or 454 Chevy, or 429 Ford, or that they should be redlined at 5,700 like a 455 Pontiac or Buick because of the large main bearings. The big Cad engines are all done in by about 4,500 rpm. This is because they were built to haul the 6,000 lb land-barges of the late-'60's and early '70's that may even be towing a trailer behind them. This is why they make such massive torque from idle to about 4,000 rpm. But there was no factory "performance" model like the W30 455 Olds or Stage 1 455 Buick. The factory never made a hot cam or performance intake or exhaust.  The second problem is there is almost zero aftermarket performance parts available.  Edelbrock makes a Performer intake manifold that will theoretically make power up to  5,500.  I say theoretically, because there's no cams, headers, nothing to increase power like there is for most other engines. But like I said-for a low-budget swap there alright. But you won't be throwing fear into the hearts of any LS6 Chevelle or RAIV GTO or 440 Road Runner owners. Mastermind   

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