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Re: most powerful production NA engine.

Quote:

Ford's Single Overhead Cam (SOHC) 427 was based on the standard 427 FE side-oiler block, with a unique set of heads and a dummy cam stub in the usual position to drive a second timing chain 6-7 feet in length to spin the two overhead cams. Available over the counter from Ford for US$2,500, it made 616bhp @ 7500 with one or 658 bhp @ 7500 with two 780 vac-secs. A gilmer belt drive setup was offered by the aftermarket which solved the stretching problems associated with so much chain, something I just learnt from photos of Ron's SOHC for sale on ebay 08-Oct-2000. I'd love any other pics you guys may have to donate.

http://www.geocities.com/infieldg/images/427sohc.jpg

Re: most powerful production NA engine.

They came in (I believe) thunderbolts. I've seen dynos from those motors, on pump gas, where they make 500lbft+ from like 1200rpm, all the way to 9000rpm. The ford can-am 429s kick ass too.