I was able to get some baseline data for the stock 4.0L today:
137HP@4587RPM/169ft.lbs. @3976RPM.
This was on a Mustang chassis dyno in 2WD, 4th gear (1:1) with 4.10 gears, 33” tires, 92 octane with stock air box/filter and slightly less restrictive exhaust (detailed above in this thread).
So that’s roughly 24% less than the Jeep 1997 stock numbers at the crankshaft (181HP@4600 & 222ft.lb.@2800).
137HP@4587RPM/169ft.lbs. @3976RPM.
This was on a Mustang chassis dyno in 2WD, 4th gear (1:1) with 4.10 gears, 33” tires, 92 octane with stock air box/filter and slightly less restrictive exhaust (detailed above in this thread).
So that’s roughly 24% less than the Jeep 1997 stock numbers at the crankshaft (181HP@4600 & 222ft.lb.@2800).