horsepower difference v6...
Elder User
Joined: Apr 2001
Posts: 772
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From: Glen Burnie Maryland
IIRC the 4.9 make 145 or so at about 2200. The 5.0 make 180-210 at about 4000. Torque values are about 260-270 for the 6 at about 2300 and 270-290 for the 8 at a much higher range.
Somebody with the spec sheet correct these for me if wrong.
However the 4.9 is a "SLOW SPEED" Engine as it has a fairly long stroke for the bore (oversquare) and makes most all of it's torque at about 1700rpm and holds that until about 3000rpm. Torque curve is predominately flat in that range. After 3000rpm the torque drops off due to construction compromises in the heads and all it makes is noise.
The 5.0 is slightly under square (bore larger than stroke) and has a fairly short stroke. HOWEVER it does take a lot of rpms to make Torque and Hp on this engine, somewhere in the neighborhood of 3000 to 4200 rpm is the peak area.
So depending on what you want you got's two choices. Pull your buddies Chevy out of the mud at darn near idle with the 6 or slip the heck out of the clutch with the 8 while revving the engine trying to make enough torque to get him out.
Personally I like the six better. It gets me down the road smartly, easier to work on (not as many skinned knuckles from trying to be double-jointed changing plugs) and themileage is slightly better than the 8 (not much, like 1-2mpg) and it just blows the mind of the chevy owners when I (87' 150, 4.9,T-18, 3.55)pull them off the boat ramp with their (truck, boat,trailer) boat hooked up idleing up the hill. Haven't tried that just yet with my '93 (4.9, 150 SCSB,E4OD,3.08) but it' getting a new rear with 3.55s' soon.
Larry
Somebody with the spec sheet correct these for me if wrong.
However the 4.9 is a "SLOW SPEED" Engine as it has a fairly long stroke for the bore (oversquare) and makes most all of it's torque at about 1700rpm and holds that until about 3000rpm. Torque curve is predominately flat in that range. After 3000rpm the torque drops off due to construction compromises in the heads and all it makes is noise.
The 5.0 is slightly under square (bore larger than stroke) and has a fairly short stroke. HOWEVER it does take a lot of rpms to make Torque and Hp on this engine, somewhere in the neighborhood of 3000 to 4200 rpm is the peak area.
So depending on what you want you got's two choices. Pull your buddies Chevy out of the mud at darn near idle with the 6 or slip the heck out of the clutch with the 8 while revving the engine trying to make enough torque to get him out.
Personally I like the six better. It gets me down the road smartly, easier to work on (not as many skinned knuckles from trying to be double-jointed changing plugs) and themileage is slightly better than the 8 (not much, like 1-2mpg) and it just blows the mind of the chevy owners when I (87' 150, 4.9,T-18, 3.55)pull them off the boat ramp with their (truck, boat,trailer) boat hooked up idleing up the hill. Haven't tried that just yet with my '93 (4.9, 150 SCSB,E4OD,3.08) but it' getting a new rear with 3.55s' soon.
Larry
