UOR-PROSJEKTER

[ROCKY4x4]

<!--quoteo(post=1335553:date=19 Apr 2007, 19:54:name=johoo)-->QUOTE(johoo @ 19 Apr 2007, 19:54) <{POST_SNAPBACK}><!--quotec-->Hælvæte æ kjøpt comanche fordi ingen andre hadd likens!!!!!!!<!--QuoteEnd--><!--QuoteEEnd-->

du får bygg dæ en hæftig stroker motor så har du en som ingen andre har vettu hær har du noen oppskrifter på en slik motor

Stroker combinations

I've outlined ten stroker combinations below based on budget and desired horsepower levels. To get maximum benefit from the stroker engine you need a free-flow intake with Powerstack or K&N cone filter, 62mm bored HO throttle body, header, high-flow cat, performance muffler and 2.5" exhaust piping.

4.5L "Poor man's" simple stroker

~ Jeep 4.2L 3.895" stroke crank
~ Jeep 4.2L 5.875" rods
~ Speed Pro 677P standard bore pistons
~ 9.05:1 CR
~ Stock 4.0 HO camshaft
~ Stock HO cylinder head
~ Stock 0.051" head gasket
~ 0.097" quench height
~ 2.25" exhaust
~ Ford 24lb/hr injectors with stock 39psi FPR for '87-'95 engines, stock injectors with stock 49psi FPR for '96 and later engines
226hp @ 4600rpm, 304lbft @ 2000rpm

4.6L Low-buck, low CR "rockcrawler"

~ Jeep 4.2L 3.895" stroke crank
~ Jeep 4.2L 5.875" rods
~ Keith-Black Silvolite UEM-2229 +0.030" bore pistons
~ Increase piston dish volume to 30cc
8.8:1 CR
~ Crane #750501 192/204 degree camshaft
~ Ported HO 1.91"/1.50" cylinder head
~ Mill block deck 0.035"
~ Mopar Performance 0.043" head gasket
~ 0.058" quench height
~ 2.25" exhaust
~ Ford 24lb/hr injectors with stock 39psi FPR for '87-'95 engines, stock injectors with stock 49psi FPR for '96 and later engines
~ 231hp @ 4400rpm, 327lbft @ 2000rpm



4.5L Low-buck simple stroker

~ Jeep 4.2L 3.895" stroke crank
~ Jeep 4.2L 5.875" rods
~ Jeep 4.0L 3.875" standard bore pistons
9.7:1 CR
~ CompCams #68-231-4 206/214 degree camshaft
~ Ported HO 1.91"/1.50" cylinder head
~ Stock 0.051" head gasket
~ 0.081" quench height
~ Ford 24lb/hr injectors with adjustable FPR or MAP adjuster for '87-'95 engines, Ford 24lb/hr injectors with stock 49psi FPR for '96 and later engines
~ 260hp @ 4850rpm, 321lbft @ 3500rpm

4.6L Low-buck stroker

Option 1: Same as above except:
~ Speed Pro H825CP +0.030" bore pistons
~ 9.6:1 CR
~ Mopar Performance 0.043" head gasket
~ 0.082" quench height*
~ 260hp @ 4800rpm, 324lbft @ 3500rpm

Option 2: Same as "rockcrawler" except:
~ Piston dish volume 22cc
~ 9.5:1 CR
~ Crane #753905 204/216 degree camshaft
~ 2.5" exhaust
~ Ford 24lb/hr injectors with adjustable FPR or MAP adjuster for '87-'95 engines, Ford 24lb/hr injectors with stock 49psi FPR for '96 and later engines
~ 256hp @ 4750rpm, 324lbft @ 3500rpm


4.7L medium-buck stroker

~ Jeep 4.2L 3.895" stroke crank
~ Jeep 4.0L 6.125" rods
~ Custom +0.060" bore pistons with 1.38" pin height & 25cc dish
~ 9.6:1 CR
~ Crane #753905 204/216 degree camshaft
~ Ported big valve 2.02"/1.60" cylinder head
~ Mopar Performance 0.043" head gasket
~ 0.043" quench height
~ Flometrics F&B 68mm billet TB
~ Accel 26lb/hr injectors with adjustable FPR or MAP adjuster for '87-'95 engines, Accel 26lb/hr injectors with stock 49psi FPR for '96 and later engines.
~ 270hp @ 4800rpm, 335lbft @ 3400rpm

4.8L medium-buck stroker

Option 1: Same as above except:
~ Custom 4.0" bore pistons with 1.38" pin height & 24cc dish
~ 10.0:1 CR
~ CompCams #68-235-4 210/218 degree camshaft
~ 284hp @ 4900rpm, 345lbft @ 3600rpm

Option 2: Same as Option 1 except:
~ Jeep 4.2L 5.875" rods bushed for 0.912" floating pin
~ Small Block Ford UEM-KB364 hypereutectic pistons
~ Mill block deck 0.015"
~ 0.051" quench height


4.9L high-buck stroker

~ 3.98" offset-ground stroker crank
~ Jeep 4.2L 5.875" rods
~ Small Block Chevy UEM-KB142 hypereutectic pistons
~ 10.5:1 CR
~ Crane #753941 216/228 degree camshaft
~ Ported big valve 2.02"/1.60" cylinder head
~ Mill block deck 0.015"
~ Mopar Performance 0.043" head gasket
~ 0.055" quench height
~ Flometrics F&B 68mm billet TB
~ 3.0" exhaust system
~ Ford 30lb/hr injectors with adjustable FPR or MAP adjuster for '87-'95 engines, Ford 30lb/hr injectors with stock 49psi FPR for '96 and later engines.
~ Custom PCM programming
~ 299hp @ 5000rpm, 353lbft @ 3700rpm

5.0L Very high-buck stroker

~ 4.06" offset-ground stroker crank
~ Jeep 4.2L 5.875" rods
~ Small Block Chevy UEM-KB142 hypereutectic pistons
~ 11.1:1 CR
~ Crane #751111 238/248 degree solid lifter cam
~ Ported big valve 2.02"/1.60" cylinder head
~ OEM 0.051" head gasket
~ 0.038" quench height
~ Flometrics F&B 68mm billet TB
~ 3.0" exhaust system
~ Ford 30lb/hr injectors with adjustable FPR or MAP adjuster
~ Custom PCM programming
~ 328hp @ 5250rpm, 375lbft @ 3800rpm