4.0L HO Jeep Engine Build
They must not have known what they were doing, 240 HP is what the mostly-stock strokers tend to make. Check this out:
http://jeep4.0performance.4mg.com/stroker.html
Wonder what a Voodoo (or other larger) cam, 10:1 compression, and roller rockers would do for one of the "4.6L low-buck" strokers. Wouldn't add too much cost either, if the cam had small enough duration to work with the stock injection system.
LMAO, nope they probably didn't. :) My build is kind of a mix between these two builds. Note that the second build makes more power than the first with the stock cam. I think that's interesting.
4.6L Low-buck, low CR "rockcrawler"
Jeep 4.2L 3.895" stroke crank
Jeep 4.2L 5.875" rods
Silvolite UEM-2229 +0.030" bore pistons
Increase piston dish volume to 30cc
8.75:1 CR
CompCams 68-115-4 192/200 degree camshaft
Ported HO 1.91"/1.50" cylinder head
Mill block deck 0.035"
Mopar/Victor 0.043" head gasket
0.058" quench height
Ford 24lb/hr injectors with stock 39psi FPR for '87-'95 engines, stock injectors with stock 49psi FPR for '96 and later engines
240hp @ 4700rpm, 315lbft @ 3000rpm
4.6L "poor man's" stroker
Jeep 4.2L 3.895" stroke crank
Jeep 4.2L 5.875" rods
Sealed Power 677CP +0.020" bore pistons
9.25:1 CR
Stock 4.0 HO camshaft
Ported HO 1.91"/1.50" cylinder head
Mopar/Victor 0.043" head gasket
0.088" quench height
Ford 24lb/hr injectors with stock 39psi FPR for '87-'95 engines, stock injectors with stock 49psi FPR for '96 and later engines
248hp @ 4900rpm, 303lbft @ 3500rpm
What I would really like is a cam with the stock duration and LCA, but with a lift in the .510-520 range in a hydraulic roller configuration. No one makes such a beast though (well, someone does but they want $2K for it and say that it will only run 20K miles before it wears out) . It is interesting that the stock cam is sufficient to feed an additional half a liter and makes more power at a higher rpm than the aftermarket comp cam, but less torque. 300+ ft. lbs from either engine is nothing to sneeze at, that's for sure. Let's see.... If I do a little math.... my engine should make about 215 hp, a 25 hp gain. I'll also be using '99+ intake manifold (which isn't really mentioned but is a much, much better design) and the early throttle body (the largest offered by the factory). Just maybe I might be able to touch a 30 hp gain. I may also get myself an adjustable fuel pressure regulator too.