what is the rev limiter on a 75' chevy 454 big block?

Question

Its a stock 454 out off a 75 chevy that i have replaced all the seals and put on a elderbrock 2.0 intake and a elderbrock 650cfm carb. all i want to know is what i should but the tach rev limiter at when i install that this weekend.

Answer 1

4,600rpm

Answer 2

I don't know why all these idiots are talking about 6500-8500 RPM when you're talking about a '75 454. That's completely ridiculous to even mention in this discussion. This isn't Nascar.

If it was brand new, I wouldn't go past 5,000, and probably wouldn't go past 4,000 if I planned on not tearing it up eventually.

Keep in mind that the valvetrain is one of the most stressed parts of an old engine, and the valve springs have likely lost some tension over the years, so why risk "sucking a valve" and tearing it all up?

With the type of low-po cams they had to use back then, spinning it past 4500 would most likely LOSE POWER because the cylinders can't fill (with air) fast enough to keep up with that kind of RPM.

Answer 3

If you are asking what the highest RPM you can turn a stock 454, it really depends on what components it was built with. A standard, low performance 454 will redline at about 5500RPM, a tall deck truck engine will fly apart much above 4500, but a high perf factory engine will take about 6000 or so with no problem. So the answer is, it depends.
A well built high performance big block will take 7500 RPM or greater with ease, but don't try that with Mr Good Wrench.

Answer 4

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Answer 5

There is no such thing as a rev limiter on an engine that old, at least not a chevy. It will go from zero to as fast as it can, and then blow up pretty much. I've heard of people setting bricks on the gas and walking away and not being able to blow them up too though, so who knows. Anyway, even one in a pickup should be able to turn 5500 pretty easily, although it will have no power up at that level with the type of cams that come in them.

Answer 6

I think what you're asking about is a speed govenor. If so - it's a special carburator that severely limits the amount of air and fuel going into the engine after the engine reaches a certain r.p.m.(2500r.p.m. ?). This in turn restricts the top speed of the vehicle to about 55m.p.h.?.

Answer 7

I'd set the rev limiter at 5500 to 6000 for a healthy stock engine.

Answer 8

with my 350, it shifts at around 4200 WOT.. i have no clue what the redline is..but 5500 sounds a little high for a big block..also, a dump truck with a 366 i believe taps out around 4500?.. somewhere close to that

Answer 9

Stock engines can do 6500-8500 RPM, It depends on the setup.

Answer 10

its bout 5 k