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Apr 8, 2010 | 04:47 PM

#16

reed1951

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Joined: Sep 2006

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From: Bristol TN.

Usually 302's have between 215 and 225 hp stock and 290 tq. but thats with stock fuel injection. It can be more like 250 hp and 300+ tq or so with a good tuned 4 bbl carb, intake, and headers. (Way more if you get after market heads.) and still get good MPG. 350 hp and 350+ tq with good aftermarket heads. Not bad for a small CI motor huh?

Apr 9, 2010 | 12:30 AM

#17

52 Merc

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Joined: Oct 2009

Posts: 16,183

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From: Burbank, WA

Quote:

Originally Posted by oldguy829

BTW, I didn't know they made a 351 small block. Thought they were Big Blocks?

351's are all small blocks. But they did make 3 distinctly different versions of engines in that displacement. The 351 Windsor is a taller deck and stroked version of the 302. It was used from 1969 until the mid 90's.

Next is the 351 Cleveland. Still a small block, but an entirely different engine design from the Windsor engines. Used only a short time from 1970-74, it was the basis for most of Fords hipo stuff until the mid 80's, when the aftermarket support for the 5.0 Mustangs and the Windsor design engine went crazy.

Finally, you have the 351M, which is the 400 tall deck Cleveland-style engine de-stroked with the 351 crank. Used in mid and full size cars and trucks from 1975-83. Never a popular choice for anything remotely considered high performance. Or even medium performance. Very heavy, so it doesn't have a good power to weight ratio. Some people confuse them with big blocks because of the tall deck height and bell housing bolt pattern shared with the 429-460 big block. But they are based on the small block architecture and bore spacing.