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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies


427vs.454

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G3GM :: G3 Tech :: Engine & Driveline

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427vs.454 Empty 427vs.454

Post by McCauley5983 Thu Nov 05, 2009 9:22 pm

wats better for a daily driver what are the downfalls of both what are the upsides
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Post by coreys73chevelle Sun Nov 08, 2009 8:03 pm

how much $ we talkin? if i could only get one gas motor for a daily driver it woul be a GMperformance parts- LSX454 with the fuel injection top end. this motor with a carburator in a 1969 camaro got over 20 mpg and it rated at over 600HP and built with a LSX block that will handle 2500Hp it has heads that are LS7 vette heads but modded 6 bolts per cyl. lots and lots its NICE!
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Post by BlackChevelleSS Mon Nov 09, 2009 12:30 am

depends, if you are wanting street ability, I would build a mild 454 for torque, then you can have a small or no stall and highway gears and itd be a great cruiser and still get on out and move.

427 will want more stall and more gear to conpensate for the rpms it needs with the short stroke.

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Post by McCauley5983 Mon Nov 09, 2009 1:54 pm

itll probably be backed by a 4 speed and id prefer to have the rpms of the 427
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G3GM :: G3 Tech :: Engine & Driveline

 
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