Quote:
Originally Posted by roylee62
I am amazed by the power, fuel economy and driveability of LS motors. Why can't we do this to a legacy Pontiac 400 motor, similar to an LS3 crate engine:
>300cfm heads
cam: low 200s duration @.050, .550" lift, 117 LSA
fuel injected
Well over 1hp/c.i. and 20mpg, trans gear ratios not-withstanding.
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I think its absolutely achievable. I'm actually surprised more builds don't lean towards "efficiency". I was quite surprised with my car that it gets over 16mpg on the highway..and that is with a 466 at around 600hp, non lockup convertor,th 350 and 308 gears.
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2,generic one inch open spacer
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
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