Originally Posted by Stoney

This was a common issue on the volvo boards for a number of eons. Modding a 240 to increase HP by removing "parasitic drag"...'cept it really didn't do much. Same guys always wanted to "Turbo" a non-turbo B21/B23 or do a 5.0 conversion, not realizing just what was involved...
I knew a few folks who were ANAL about keeping MPG records and a couple did the fan swap, remove a clutch driven fan and install a electric fan, thinking it was the "cold fusion" of volvo-dom and thir MPG would automaticly become 40+...
End result was an average of 6 to 10 more Miles PER TANK! Which worked out to approx .33 to .60 additional MPG in reality. The cost of the conbversion, even with JY parts, could never be realized ('cept we all know that Volvo drivers will keep that brick running until they stop making Gasoline). From a reliability POV, I have personally never had a drive belt on a Volvo snap...not in 9 cars over 25 years.