Hot Rod magazine strokes a 300 v8 out to 349 cubes

[bob k. mando]

and makes 390hp @ 5,700rpm with 422 lb-ft @ 3,700, normally aspirated:

http://www.hotrod.com/techarticles/engine/hrdp_1103_how_to_hot_rod_any_engine/viewall.html




i am a little late posting this but it's still a very interesting article. March 2011 issue of the magazine.

 

[bob k. mando]

just for grins and giggles, the April edition of Circle Track has a full blown rebuild and dyno test on a "Late Model Stock" SBC engine that's going to be raced at Daytona ( 4/10s mile oval track ) Feb 17-19, 2013. it wouldn't surprise me if they spent $30,000 to build this motor and it's got ALL the trickest parts they can stuff into it. the main thing holding it back is a 2v Holley 500cfm carb with a 'small volume' dual plane intake.

here's their dyno sheet:

RPM     TORQUE   HORSEPOWER
3,800    448        324.1
3,900    448.4     333
4,000    450.9     343.4
4,100    459.9     351.2   <<< torque peak
4,200    450.3     360.1
4,300    448.5     367.2
4,400    444.1     372
4,500    442.2     378.9
4,600    443.5     383.2
4,700    438.2     392.1
4,800    433.2     395.9
4,900    431.7     402.7
5,000    426.1     405.7
5,100    430        417.6 
5,200    427.2     423
5,300    422.8     426.6
5,400    415.7     427.4
5,500    411.7     431.2
5,600    408.4     435.5
5,700    404.7     439.2
5,800    400.3     442
5,900    394.2     442.8
6,000    390.2     445.8
6,100    383.2     445.1
6,200    378.3     446.6
6,300    370.1     444
6,400    360.1     442.5
6,500    362.1     448.1   <<< horsepower peak
6,600    353.9     444.7
6,700    344.9     440
6,800    337.5     437

so, the little 349 that could isn't too godawful far off from a modern, high dollar, circle track engine. and the Buick did it on 91 octane. you can be sure the SBC is on 105+ octane race gas and is probably ~360 cubes. the biggest advantage the circle track is has is that they're going almost to 7k rpm with it.


CT doesn't have the story posted online just yet, but here's one they covered last year from a similar engine:
http://www.circletrack.com/enginetech/ctrp_1107_late_model_stock_valvetrain/