Streetable 4.8 ?
03-06-2016, 10:54 PM
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Streetable 4.8 ? I've got a 4.8 liter in my '57 chevy half-ton. I chose it based on having 4.10 gears in back and some foolhardy notion of fuel economy... Gas is cheap again and I don't drive enough miles in the truck to give a damn anyway.
So, I'm thinking about putting a 210/218 0.551" / 116* cam, Pac 1218 springs & roller trunnion kit in the truck. I'd want to raise the redline to 6,500 or maybe closer to 7,000 RPM, too.
Two questions
1 Would this justify upgraded pushrods as well?
2 Given that I'll probably someday buy a 5.3 or 6.0 to put these parts onto (displacement and all), will this cam still be a good daily driver upgrade? Feel good with a yard of dirt in the bed?
Super Chevy magazine dyno'ed this combination in a 4.8 at 384 horsepower (baseline was 336). With an SAE net (real world) correction, Chevy gives the 4.8 ~290 horsepower. Call it 86% of what the magazine says. Comes out around 330 real world horsepower at the flex plate, peaking in the mid 6000 RPM range. Sounds fun!
So, I'm thinking about putting a 210/218 0.551" / 116* cam, Pac 1218 springs & roller trunnion kit in the truck. I'd want to raise the redline to 6,500 or maybe closer to 7,000 RPM, too.
Two questions
1 Would this justify upgraded pushrods as well?
2 Given that I'll probably someday buy a 5.3 or 6.0 to put these parts onto (displacement and all), will this cam still be a good daily driver upgrade? Feel good with a yard of dirt in the bed?
Super Chevy magazine dyno'ed this combination in a 4.8 at 384 horsepower (baseline was 336). With an SAE net (real world) correction, Chevy gives the 4.8 ~290 horsepower. Call it 86% of what the magazine says. Comes out around 330 real world horsepower at the flex plate, peaking in the mid 6000 RPM range. Sounds fun!
