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RPM limit bug


#1

Depending on the engine component limits (obviously) you can make one that doesn’t detonate at fail point. If you set the limit high enough, it simply wont die in testing - in at least one case.

I built a 1952, 3.8L pushrod I6.
At 4170rpm, the graph shows negative output (so, that’s input, right?)
So, a 4K max… set the testing limit at 12K, it will run to the 4K, and bounce, but simply not die.

Further testing: Setting it at 4,000 or even 4,100 will cause failure, any higher it becomes bullet proof.
The tacho does weird shit, too. With a limit of 5100, when not running, it displays (clockwise, of course) 1-1-1-2-5-3-7-4-3-5-11-6 KRPM.


#2

Every even number is divided by 2 for some reason


#3

Not exactly, I think. It seems that it displays the correct numbers for the 5100 limit, and then puts another set from a 12000 RPM scale in between.


#4

I mean, the bug with tacho :stuck_out_tongue:


#5

Yes, I mean that too.


#6

For me it just sometimes shows like I described, only when it wants to, even in some old cars with like 4500 RPM