What RPM is safe?
#1
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Location: Benbrook, TX
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What RPM is safe?
I was pulling out from a side street onto the main road the other day and got on it pretty good because traffic was coming and the back end broke loose. I shifted as quickly as I could but I saw the tach at almost 3500rpm. The truck still runs and drives fine but any time I see a tach in the red zone I get scared. I've got a smarty jr and exhaust but other than that the truck is stock, did I hurt anything?
#2
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Don't exceed 3500 or you will risk slapping a piston. I have hit 3500 on several occasions and have been fine, but that is its limit. You will be fine bud.
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I dont really know alot about our truck programming but I can tell you my mustang will limit the RPMS to 6250 no matter what the crappy factory tach says. So I would think if our truck has a factory rev limiter it wouldnt go past that set rpm no matter what. sorry i could give you more info
#6
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A guy stopped me yesterday and asked about my 5500 truck. Said he just bought a used 2500 and wanted to know the difference. I admitted I just put some extra 5's on it.
He told me about his new muffler and I said I ordered a shift kit. Then he said maybe he needed a shift kit because his truck will rev to 5500 rpms before it will shift. I said that would be really bad because redline is 3200.
He mentioned hitting 5500 to 6000 a couple more times. I don't believe it could ever happen, but I do know some trucks that will run 4200.
A quick burst above 3200 with a stock engine shouldn't hurt.
He told me about his new muffler and I said I ordered a shift kit. Then he said maybe he needed a shift kit because his truck will rev to 5500 rpms before it will shift. I said that would be really bad because redline is 3200.
He mentioned hitting 5500 to 6000 a couple more times. I don't believe it could ever happen, but I do know some trucks that will run 4200.
A quick burst above 3200 with a stock engine shouldn't hurt.
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#9
DTR Detective
What year? Maybe it's the old 5.9 Magnum? Chances are they had no idea what they were talking about. I don't think our RPM gauge even shows above 4K does it?
#10
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#11
DTR Detective
Ya, I just checked it goes to 5k. Maybe they're just used to seeing a 7-8k Tach and needle placement at a 2 o'clock position which would be around 5-6K if I remember my Mustang and Jeep well enough.
#14
DTR Detective
I've had mine over 3500RPM's. Tow/Haul Mode when coasting down a decent grade with light braking it'll downshift and hold 3500RPM's or so. I can't imagine it's too dangerous if the computer is allowed to do it.
#15
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Thanks for the replies guys, that puts my mind at ease. Still not something I plan on doing ever again but at least now I know that if it happens I don't have to worry too much.