RPM'S
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From: Kentucky
RPM'S
[updated:LAST EDITED ON 20-Nov-02 AT 08:14 PM (EST)]Originally posted by StrangeRanger
""A stock 300 won't come apart at 6000, but it may not live very long if you push it that far very often. If you really need a "redline" number try 5500 for argument's sake. The question is: WHY BOTHER? Depending on year the torque peak is 2000 RPM +/- 200 and the HP peak is 3500 +/- 200. Rev it much beyond that and all you're making is noise. You're actually losing performance vs. shifting to the next gear. The computer shifts the E4OD at 3600, with an M5OD you probably have no reason to go above 4000. ""
Excellent post StrangeRanger...Very informative...
For everyday driving I shift at 2400 RPM..The highest I have ever been was 3000.. There is simply no need to go there, This beast has all of it's power in the 1400-2400 RPM range
ftwfred
""A stock 300 won't come apart at 6000, but it may not live very long if you push it that far very often. If you really need a "redline" number try 5500 for argument's sake. The question is: WHY BOTHER? Depending on year the torque peak is 2000 RPM +/- 200 and the HP peak is 3500 +/- 200. Rev it much beyond that and all you're making is noise. You're actually losing performance vs. shifting to the next gear. The computer shifts the E4OD at 3600, with an M5OD you probably have no reason to go above 4000. ""
Excellent post StrangeRanger...Very informative...
For everyday driving I shift at 2400 RPM..The highest I have ever been was 3000.. There is simply no need to go there, This beast has all of it's power in the 1400-2400 RPM range
ftwfred
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From: Metro Detroit (Redford)
RPM'S
>There is simply no need to go there,
>This beast has all of it's power in the 1400-2400 RPM range
Right, but I go there because it's fun!
Actually my best power band runs about 2000 up to the mid 3000s. I never noticed this with my carburated 300s, but the EFI has a definite power surge at about 2000 RPM on up and is a tad sluggish below that--sluggish, but now without plenty of torque. :-)
>This beast has all of it's power in the 1400-2400 RPM range
Right, but I go there because it's fun!
Actually my best power band runs about 2000 up to the mid 3000s. I never noticed this with my carburated 300s, but the EFI has a definite power surge at about 2000 RPM on up and is a tad sluggish below that--sluggish, but now without plenty of torque. :-)
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From: Coal Region
RPM'S
mine 2. i notice when im climbin a hill or even accelerating fast it will have a nice surge around 2000 up till it shifts then its sluggish till it hits 2000 again...lots of fun to drive :-)
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From: Conyers
RPM'S
Mine pulls strong to 4500..after that, the 500 rpms until the 5000rpm ignition rev limiter, it doens't pull too hard. I've seen 300s shifted at 7000, but I wouuln't want to take one that high.
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From: Connecticut
RPM'S
>Mine pulls strong to 4500..after that, the 500 rpms until
>the 5000rpm ignition rev limiter, it doens't pull too hard.
>I've seen 300s shifted at 7000, but I wouuln't want to take
>one that high.
thanks to all of you for your responses.. but now im really confused.. most of you are saying it has no cut off. and this dude comes and says there is.. HELP
>the 5000rpm ignition rev limiter, it doens't pull too hard.
>I've seen 300s shifted at 7000, but I wouuln't want to take
>one that high.
thanks to all of you for your responses.. but now im really confused.. most of you are saying it has no cut off. and this dude comes and says there is.. HELP
Posting Guru
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From: Southeast FLA
RPM'S
knocturnal, please realize that wildjon300ci is either bragging or is just misguided in posting what he did. Take a look at his engine specs - he does not have a stock engine, his probably pulls more due to his cam, and his specs and useful RPM's have almost no relevance to your original question (other than the fact that any engine can be made to do almost anything - even if only for a short while).
wildjon300ci, I'm going to go on record as saying that your post was not in the best interest of someone less mechanically inclined than you, and that you should have known that. You could have, and should have, added more of a background to reduce his confusion, or you probably shouldn't have answered in this thread at all. Perhaps you could remedy the situation by explaining to knocturnal exactly why your engine pulls to the RPMs it does?
Best,
wildjon300ci, I'm going to go on record as saying that your post was not in the best interest of someone less mechanically inclined than you, and that you should have known that. You could have, and should have, added more of a background to reduce his confusion, or you probably shouldn't have answered in this thread at all. Perhaps you could remedy the situation by explaining to knocturnal exactly why your engine pulls to the RPMs it does?
Best,
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RPM'S
The original question included "whats the highest i can get with out destroying anything." AFAIK he hasn't done anything special to the internals to his motor so (along with some bragging rights) he is saying that it is safe to run it up to 4500-5000rpm in his experience.
-=Whittey=-
-=Whittey=-
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From: Southeast FLA
RPM'S
My fault - somebody give me some negative points there. With everything wildjon300ci did I assumed it was to a built engine. I got the original question mixed up with the usable power RPMs.
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RPM'S
Hey no worries mang 
I've got enough negatives on me for you not to worry
As for the rev limiter, I don't know. Someone above said on the EFI sixes there was a rev limiter stock, but I never hit it. If you've got a near-stock 300 then you really don't have much use for anything over 4000rpm. On a stocker carb motor there was no limiter. Those with upgraded ignitions may or may not have a rev limiter, depending on which product they use. On my '85 with a warmed up 300 (very similar to Wildjon's setup (I have offy dp/hooker supercomp and a different 270cam) I have my rev limiter set to 5000 with the shiftlight on the tach set for 4500. Of course its not running yet because i'm a slacker to the extreme, but hey
-=Whittey=-
I've got enough negatives on me for you not to worry As for the rev limiter, I don't know. Someone above said on the EFI sixes there was a rev limiter stock, but I never hit it. If you've got a near-stock 300 then you really don't have much use for anything over 4000rpm. On a stocker carb motor there was no limiter. Those with upgraded ignitions may or may not have a rev limiter, depending on which product they use. On my '85 with a warmed up 300 (very similar to Wildjon's setup (I have offy dp/hooker supercomp and a different 270cam) I have my rev limiter set to 5000 with the shiftlight on the tach set for 4500. Of course its not running yet because i'm a slacker to the extreme, but hey
-=Whittey=-
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From: St. Louis, MO USA
RPM'S
i was told that, for my truck, the auto tranny would shift at about 3800rpm. i dont have a tach, but when in neutral and throttle down, it seems it stops at about 6k, maybe less, my ears arent that good. i know my moms sable has a rev limit at about 6k, and once you hit it, the tach will "bounce", which never happens in the truck, maybe its just the way its set up? i dont know, just voicing what ive experienced here, would be useful to know for future reference (i.e. if i do that twin turbo setup ive been thinkin bout)
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From: Broken Arrow, OK
RPM'S
All modern EFI engines have a rev limiter in their programming. Most are set to a point that prevents engine damage if you get into it, but not necessarily right after the usable rpm range. Most pull fuel instead of spark. My Lightning pulls fuel even though it's blown. A power adder engine that pulls fuel at the rev limit is not in anymore danger than a stock engine as long as it's set up properly. The people that blow motors when they get into the limiter are usually running way too lean in the first place, and hitting the limiter was the last straw. As far as the stock 4.9 limiter, I could probably floor my truck with the clutch in and it wouldn't go over 5k because it couldn't get enough air. I know it really struggles to get over 4k in any gear, and it's probably one of the strongest running 300's out there with stock internals.
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RPM'S
THANK you... all of you, your responses are informing me.... i think one of you is running your mouth... < mr. seen 7k> not to mention any names. but hey thanks all of you youve been a great help
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From: Florida
RPM'S
well in order to get outta someone's way i once stayed in first on up past 4000 prolly about to 5, and my motor just cut out until it hit a reasonable rpm im assuming. So i would say it's a fuel shut off on my 93'. Skeered me though almost hit the dashboard lol. But my dad has a ranger and when i'm romping on that thing it cuts out at 6 grand but feels like that 4 cylinder could easily do 9 wiht no probs. why do they do that to us, it just bobbles at 6 not cut out like mine though. It kinda scares me cus i don't pay attention to tachs usually cus i do it all be ear. the I6 sounds pretty hurt at 4-5 grand though.