have fun
rpm 460
More Turbo
Joined: Mar 2007
Posts: 707
Likes: 1
From: Buffalo, Wyoming
I would say dont take it over 6000 and I think my friends tacs out at 5000. I am not positive because mine dosnt have a tac. But i am almost positive that 2000 is way to low, your motor is probably about 2000 at 75 or 80 on the highway, just dont have it at 5000 for more than just a little bit or it will blow.
More Turbo
Joined: Mar 2008
Posts: 658
Likes: 2
As a general rule for fuel economy you should try to keep it under 2000. Doesn't mean that the engine tops out at 2000. I've never taken mine over 4000 because things start getting scary when its putting out that much angular velocity with such a large engine.
Post Fiend
Joined: Apr 2004
Posts: 6,473
Likes: 4
From: Lafayette, IN
With 4.10s and 31" (stock size) tires, my 351 is turning just shy of 2000 at 65 mph. If you have an E4OD, you would be at the same RPM with the same gears and tires. But, with different gears and tires, you could find a calculator on the web somewhere to compare.
Like the others said, you're probably still find in the 3000-4000 RPM range, but with any motor, the faster you spin it, the quicker it wears out. So, if you're trying to accelerate with a heavy load, by all means wind it out. Just don't run there all the time. For cruising, you're going to be best off keeping it under 2500, under 2000 is even better (for wear and mileage).
Jason
Like the others said, you're probably still find in the 3000-4000 RPM range, but with any motor, the faster you spin it, the quicker it wears out. So, if you're trying to accelerate with a heavy load, by all means wind it out. Just don't run there all the time. For cruising, you're going to be best off keeping it under 2500, under 2000 is even better (for wear and mileage).
Jason
Junior User
Joined: Nov 2006
Posts: 73
Likes: 0
From: Mass
I would say dont take it over 6000 and I think my friends tacs out at 5000. I am not positive because mine dosnt have a tac. But i am almost positive that 2000 is way to low, your motor is probably about 2000 at 75 or 80 on the highway, just dont have it at 5000 for more than just a little bit or it will blow.
My truck (5.8 w/ E40D) has an aftermarket tac on it and it only goes to 4250 ish before shifting if I floor it from a dead stop.
On stock wheels and a little bit bigger tires, I tac 1800 going about 65 mph.
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Senior User
Joined: Nov 2006
Posts: 418
Likes: 0
From: Quad Cities, IA
My 460 seems to hit it's "sweet spot" in the power band between 1500 and 2300 rpm. It also winds up to 2500 rpm at 65mph in overdrive. I agree with the comment that the 2000 rpm is the "fuel economy limit", but by no means is it the maximum redline of a 460. I've had mine up to 4k a few times (it scares me to do so, though...). I usually keep it under 3k rpm for my own peace of mind.
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More Turbo
Joined: Mar 2007
Posts: 707
Likes: 1
From: Buffalo, Wyoming
I think it is a 77' f250 with a new lower geared rear end not positive what gears but its lower than the 4.10 he had in it, with a 460 and a four speed stick. He is planing on putting bigger tires on it but for now all it has is the same stock size. It has a new cam in it also and was rebuilt not to long ago.
Street Queen to the extr3m3
Joined: Jan 2005
Posts: 4,554
Likes: 3
From: Lubbock, Texas
2k is a good fuel economy limit but come on 460 and fuel economy dont belong in the same sentence... Now as a 2k redline i dont think so. I would say 6k is redline... Vary rarly does my truck see over 5k and i usually shift at about3-3.5k
Post Fiend
Joined: May 2004
Posts: 11,289
Likes: 6
From: Lakewood, Ohio
5000 rpm is a safe limit for a 460.
6000 rpm is not safe limit for a 460.
if it was my truck i would stay below 4000 rpm.
my 2¢.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
I agree w/ quicklook.
My truck tach is redlined @ 5500, but with the RV cam timed straight up I don't know if it would do it anymore.
20 years ago it would, and did turn 5500 often without much harm. (the original motor made it to 315K)
I short shift and keep it under 3000 rpm now, unless I need it on the highway....
My truck tach is redlined @ 5500, but with the RV cam timed straight up I don't know if it would do it anymore.
20 years ago it would, and did turn 5500 often without much harm. (the original motor made it to 315K)
I short shift and keep it under 3000 rpm now, unless I need it on the highway....
