RCU Forums - View Single Post - Overloading an engine

10-10-2008 | 01:13 AM

#22

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: Overloading an engine

No problem at all, Dave.

No need to apologize...[

]

We've slipped off the subject of this thread, I believe.

The MVVS does gain a great deal more power than other engines, as more time is logged on it.
This is true of all MVVS ABC engines.

The MAN test I referred to indicates the ST has its peak torque value just below 6,000 RPM, which is very low for a model two-stroke engine of this size. But even though it spins it faster than what we think is peak torque, it appears to be overloaded... Could your engine be so different from the one Mike Billinton used for his 1996 test?

Could it have different timing numbers that shift the torque curve up and it now peaks higher than the RPM achieved on that prop?

These numbers are advertised in the test and you can if your engine's numbers differ...

An interesting test would be to see if a 14x10, or a 14x8 prop of the same make (if you have them...), would make the RPM jump at a certain point...

If the 14x10 is spun at 8,500 RPM, for example (a gain of over 1,000 RPM), it would be an indication that you had just crossed to the safe side of peak torque...

The MVVS and the Webra seem to be in the safe area anyway.

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