What is the “highest” HP someone has put into a Kitfox?

[Rik]

The STi wing is a higher lift wing so that makes it slower than the standard wing by about 20 mph or so using the same engine in each for comparison. It does come with a lower stall speed.
The standard wing is what Stick & Rudder uses on their training Kitfox’ and Stick & Rudder is the gold standard for back country flight instruction in some of the most challenging fields in Idaho. One has the 914 turbo and the other is a 912 fuel injected 100 hp.

The vne speed is 140.

Yea, I was reading the VNE is 140, but VA is not listed which is more important.