In article ,
"Nele VII" writes:
I know that some fighter jets have somewhat like WEP (war emergency power).

MiG-21Bis/R-25 -13,000lb dry/15650 AFB/19-20,000 "Chrezvychayniy Regime"
(WEP)
Kfir C2/J79 -"Combat Plus"
F16/J79 Prototype- "Combat Plus"
F-8 Crusader "Waweoff power"

Now, I know for a MiG. Any other airplanes/engines that can be "overrevv'd"?

The ATAR 9 on the Mirage III, IV, adn V series airplanes had an
overspeed mode for supersonic flight, which added about 5-10% to the
available thrust.

--
Pete Stickney
A strong conviction that something must be done is the parent of many
bad measures. -- Daniel Webster