New Tach
Postmaster
Joined: Dec 2006
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From: Spokane, WA
I doubt that one will find the results of testing by Ford engineers in the lab while running these engines or any other engine at WOT for extended periods of time to find a breaking point. And I doubt too that on vehicles equipped with factory tachs and their yellow/red rpm indicators that this is going to be an indication of the breaking point of an engine but it will certainly be a point that if exceeded would void engine warranties.
Elder User
Joined: Oct 2006
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Originally Posted by IcemanV8
Yeah, yeah, I don't belong here. I have the 5.0, but I kind of asked a similiar question about redline before and couldn't get an answer, either.
Where can we find what the redlines are for our trucks? I know my truck's peak power is 185HP @ 4100RPM, and peak torque of 280ft/lbs@2400RPM. Well, I have a little custom 'free' exhaust work, but I won't throw that in to this equation.
But, I still want to know my redline for a couple of reasons. Number one, I have wound my truck out to 65mph in 3rd gear before. THEN I later installed a tach to find out that equaled probably around 5300RPM. I don't know the exact number because I didn't want to do it again, but if I ever wind it out, I bring it out to 5k RPM or less.
Another time, alcohol had the better of me one night camping, and my throttle got stuck at WOT and the damn thing revved to the moon (with the clutch in/neutral). I was told these trucks don't have RPM limiters... but I don't know how the damn thing didn't blow up. I've drove it a lot since then, oil pressure shows the same, and there's absolutely no engine noise. I mean, it really revved all it could and I don't know how it didn't do any damage.
Anyways, where can we find the redlines of these trucks? I just want to know. Not to 'take it to redline', I just like to know my engine.
Where can we find what the redlines are for our trucks? I know my truck's peak power is 185HP @ 4100RPM, and peak torque of 280ft/lbs@2400RPM. Well, I have a little custom 'free' exhaust work, but I won't throw that in to this equation.
But, I still want to know my redline for a couple of reasons. Number one, I have wound my truck out to 65mph in 3rd gear before. THEN I later installed a tach to find out that equaled probably around 5300RPM. I don't know the exact number because I didn't want to do it again, but if I ever wind it out, I bring it out to 5k RPM or less.
Another time, alcohol had the better of me one night camping, and my throttle got stuck at WOT and the damn thing revved to the moon (with the clutch in/neutral). I was told these trucks don't have RPM limiters... but I don't know how the damn thing didn't blow up. I've drove it a lot since then, oil pressure shows the same, and there's absolutely no engine noise. I mean, it really revved all it could and I don't know how it didn't do any damage.
Anyways, where can we find the redlines of these trucks? I just want to know. Not to 'take it to redline', I just like to know my engine.
5300 is not a big deal on a 5.0. the ecu in my 93 mustang pulls the plug at 6250. The truck one obviously wont pull past 4500 or whatever but youre probably ok.
the 4.9 is a different story
Elder User
Joined: Oct 2006
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i do not beleive so.
the only 2 differences i could think of would be (1) whether or not your engine has a bunch of indiviual belts for the accessories or one, fatter, serpentine belt. And (2) whether or not your engine uses a flat tappet or hydraulic roller camshaft. The early 302s had individual belts and flat tappet cams, as well as a different firing order from the HOs (like in my mustang). Someone who knows more about the evolution of the 302 block should chime in and correct me / add on to what ive said, but even so dude, i highly doubt that a well maintained high mileage 5.0 is going to be in serious trouble at just 5000 rpm. 6 or 7 would be a different story, but 5k is reasonable, especially for short visits.
the only 2 differences i could think of would be (1) whether or not your engine has a bunch of indiviual belts for the accessories or one, fatter, serpentine belt. And (2) whether or not your engine uses a flat tappet or hydraulic roller camshaft. The early 302s had individual belts and flat tappet cams, as well as a different firing order from the HOs (like in my mustang). Someone who knows more about the evolution of the 302 block should chime in and correct me / add on to what ive said, but even so dude, i highly doubt that a well maintained high mileage 5.0 is going to be in serious trouble at just 5000 rpm. 6 or 7 would be a different story, but 5k is reasonable, especially for short visits.
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Joined: Sep 2007
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That's good to know, thanks. Everynow and then, I like to wind my engines out a little bit. Gets the oil circulating better, lol. Somedays I'll ride around and rarely go passed 2000 RPM, and somedays, I'm winding out to 3k at every shift. Not that 3k is high revving on a 302, but it just isn't necessary. I do it for the circulation. Oh well, Not much point in going passed 4500 unless racing and need my 4th gear to hit a good RPM from 3rd-4th. And I've only raced (if that's what you can call it) a Honda Accord 4cyl. Sadly, I was barely faster.
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Joined: Nov 2007
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Originally Posted by 6CylBill
I was just curious really. When I had 3.08's, I could go 20 MPH at 900 rpm steady.
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