400M compared to 460?
Senior User
Joined: Jan 2001
Posts: 223
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From: Coquitlam, BC Canada
400M compared to 460?
I was just wondering If anyone had a 400 and a 460 and how they compared?, as far as power, gas milage, overall performance?.
Thanks alot,
1979 F-250 400M 2wd,
Joe
Thanks alot,
1979 F-250 400M 2wd,
Joe
Posting Guru
Joined: Jun 1999
Posts: 2,404
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From: Everett, Wa
400M compared to 460?
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I put a 460 in 2 years ago and its amazing. I had the 400 in for 179k and am not complaning. It did everything I asked of it include pulling my 65 Lincoln over the mountains a couple of times and one time carry a bunch of rocks with GWR at 11500, only rated at 7200. I got my money out of it, but my 460 seems the be twice as strong. Its not stock and while I have yet to put it on a dyno, I figure its at about 400hp and close to 600lbs of torque. I had to disconnect the kickdown because on wet roads it would break the rear end loose. Mash the gas pedal to the floor and you can burn the tires off the rim. Gas milage is about the same, maybe a little better. This is the first truck I've had with a big block and I will never go back.
Terry
I put a 460 in 2 years ago and its amazing. I had the 400 in for 179k and am not complaning. It did everything I asked of it include pulling my 65 Lincoln over the mountains a couple of times and one time carry a bunch of rocks with GWR at 11500, only rated at 7200. I got my money out of it, but my 460 seems the be twice as strong. Its not stock and while I have yet to put it on a dyno, I figure its at about 400hp and close to 600lbs of torque. I had to disconnect the kickdown because on wet roads it would break the rear end loose. Mash the gas pedal to the floor and you can burn the tires off the rim. Gas milage is about the same, maybe a little better. This is the first truck I've had with a big block and I will never go back.
Terry
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Joined: Oct 1999
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From: yes
400M compared to 460?
my understanding is that if the 400M is in front of an automatic transmission yes it will bolt up, but that the sticks are different somehow. Also the 400M needs a healthy dose of more compression than it was given, it has huge intake ports and valves and if built properly is a excellent performer, there was a HOT ROD a while ago where they built a high torque 400M
