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Enthusiasts tend to have rose tinted compassion for their pet cars. The fact is the Buick 215 has never obtained very inspiring BSFC or performance figures compared to competing designs. The engine has a weak valve train and frequently requires an overhaul after only 100,000 miles. For an engine with a low specific output, that's atrocious. It's only merit is its light weight, but on a lb/hp basis it is still poor. The ford small block is physically smaller. The chevy small block is far more capable. The aluminium SBC is not that much heavier than the Buick. There is far more aftermarket support for the SBC and SBF.
You can spend £10,000 building up a trick 5.0+litre buick that'll just about make 400hp and have all the shortcomings of a full race engine. Or you could take a stock 350, bolt on a nice set of AFR heads, add a rollor cam, a nice dual plane intake, 4 barrel carb and have an easy 400 streetrable horsepower and change out of £5 grand. No comparison.
I'd like to see a buick 215 do 0-60 in 5 seconds in a Go kart.
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