http://www.cherokeeforum.com/f46/project-becauseracejeep-173699/
Many pictures, enjoy. Top Mount TJ M62 Supercharger Kit install on XJ.
'99 Cherokee XJ 2WD 2 door auto 4.0L
-Lowered- front: cut 3" lift springs 200-250lb/in, shortened bump stops rear: composite/fiberglass springs 'reverse arch' SpringOverAxle! 475lb/in, cut bump stops
-Suspension- Tubular Control Arms, poly bushings, Bilstein Shocks F+R, Addco 1 1/8" front sway bar, Custom bent Addco 7/8" rear 'under the axle' sway bar
-3/8" flat steel transmission mount for increased ground clearance
-Axle- Chrysler 8.25" 3.55 gears Detroit TrueTrac rear diff
-Ground Effects- Blazer front air dam, BMW M3 side skirts, Orvis rear roof spoiler, roof air straighteners
-Interior- Rugged Ridge XHD Sierra Black seats, red 4 point race harnesses, stereo, rear subwoofer, amplifier, rear seat delete, LED Gear Indicator, switchable auto-manual trans shifting
-Motor- stock 160K+ miles, Harland Sharp 1.6 roller rockers, M62 Top mount Supercharger, 7th injector enrichment, Meth/washer fluid injection
-Trans- AW4 shift kit by Transgo 'Hot Rod' stage, Custom Manual shifting, LED Gear Indicator Display
-Wheels- 18"x10" Mustang Cobra Replicas F+R, front 1.0" + rear 1.5" wheel spacers
-Tires- daily: Nexen 265/35x18 autocross: Continental 275/35x18" road racing slicks
-Misc- Brown Dog motor mounts, CSF 3 core radiator, dual 10" pusher fans, rear hood lift, LED fog lights, under bumper CAI, DUI ignition upgrade
-Full interior, carpet mats, A/C, Tagged and registered, daily driver, Smog and OBDII Legal
-Weight fully loaded = 3300 lbs, need to unload and reweigh and corner weigh
Future PLANS-
-Carbon Fiber Drive Shaft- PST "Critical Link" CF drive shaft 39.5", 6.8lbs with U joints
-cut 7.5" lift Rubicon Express front springs for higher spring rating 400-450lb/in, to stiffen front suspension
-GM Monte Carlo SS quick ratio steering box, 2.5 turns lock-to-lock
-upgrade front brakes to 14" GT500 rotors and Jeep SRT8 6 piston calipers
-upgrade rear brakes to 14" GT500 rotors and Jeep SRT8 4 piston rear calipers, lose emergency brake
-Retro fit ABS front and rear
-Torque arm traction bar
-weld-on and bolt-on frame stiffners
-more power- ported big valve head, 1.7 Harland Sharp roller rockers, see Forged 4.0L Engine Build
-M90 supercharger and more boost! Goal 400 rear wheel HP!
-D30 front axle with TrueTrac, 4WD auto trans + 242 transfer case, 4-AWD!!
-Autocross, Autocross, Autocross
Jeep 4.0L Ported Big Valve Head
Unfortunately there is no readily available head pre-built like this
I want a New casting head which is thicker in many of the critical areas. Universal- fits all years '91-'06 (0630, 7120, 0331) Lifter/push rod holes bored for easy removal of lifters with head installed Good lightweight springs- not too heavy. Big SS valves. Will work with stock and aftermarket high lift cams. All the good stuff.
-New Aftermarket Bare 4.0L head 0331 type but thicker, stronger and reinforced in the critical areas
-Mopar P5249878 2.020" intake valve 8mm stem single groove 4.91" 5.2/5.9L
-Mopar P5249876 1.625" exhaust valve 8mm stem single groove 4.93" 5.2/5.9L
-Mopar P4529218 valve keepers Hemi 5.7-6.1L 8mm 8* single groove
-Mopar 53021676AB valve retainers 8* single groove
-Lunati 74814 Beehive springs 275lb/in bind@0.600" lift 100 lbs@1.64" 224 lbs@1.190"(0.450"lift) 237 lbs@1.140"(0.500"lift)
-intake and exhaust runners, throat and short side ported
-ported for best flow up to 0.500-0.550"" (not hogged out for 0.600" lift and 6,000+rpm)
-assembled and bench flowed intake and exhaust ports, stock vs. ported
-polished and shaped combustion chamber for 3.935" bore
-push rod holes opened up to 15/16" to allow lifters to pass thru
Collecting parts now-
Head from Clearwater Cylinder Heads FL $365 free shipping no core
Lunati springs x12 $127.51 shipped
Mopar valves, retainers, keepers $258.97 shipped
Victor Heinz valve stem seals $18.50
-Other Engine Parts
Scat 4340 forged Rods with ARP 8740 series 3/8" cap screws good to 550HP $282.78 shipped
ARP Cylinder Head Studs, Main Studs, Flexplate Bolt Kit all $237.80 shipped
Head Flow Numbers- 0.100 0.200 0.300 0.400 0.500" (RED highest value)
7120 0630 Head stock 66.0 128.0 179.0 206.0 219.0 Exhaust- 55.0 100.0 120.0 136.0 141.0
HO head 0331 Intake- 59.4 122.6 171.1 201.1 214.3 Exhaust- 47.1 093.4 123.3 140.9 147.0
Ported HO head 7120 68.4 132.6 185.4 213.4 216.5 Exhaust- 64.3 116.9 149.6 158.9 165.0
Ported HO head 0331 65.2 128.4 186.5 219.5 218.9 Exhaust- 56.9 096.9 123.9 140.2 148.9
Ported HO 2.02/1.60 73.9 142.4 197.8 229.8 247.0 Exhaust- 65.3 114.0 135.9 146.3 157.1
Dr.J ported 1.91/1.50 67.0 137.0 190.0 227.0 237.0 Exhaust- 60.0 101.0 133.0 164.0 182.0
Hesco head 1.91/1.50 74.0 134.0 183.0 226.0 255.0 Exhaust- 55.0 093.0 117.0 131.0 142.0
Hesco Port 2.02/1.57 61.2 116.8 164.7 205.3 235.2 Exhaust- 51.0 080.5 110.2 132.8 149.1
HO ported BV chamb 57.9 122.0 176.8 214.5 225.5 Exhaust- 49.7 091.8 127.0 153.9 165.5
Other 1.94/1.50 Chevy 177.0 214.0 Exhaust- 130.0 146.0
Ported 1.94/1.50 Chevy 185.0 216.0 Exhaust- 150.0 165.0
Edelbrock Alumn 4.0 Head 1.91"/1.50" 55cc 144ccIntake/77ccExhast (stock 112cc/73cc)
Edelbrock Alumn stock 66.0 123 179.0 221.0 241.0 Exhaust- 63.0 103.0 127.0 144.0 151
A'mkt ported 2.02/1.62 78 152 212 245 265 Exhaust- 66 121 159 172 188
7120 Head- '91-'95 has screw in coolant sensor in back of head
0630 Head- '96-'99
0331 Head- '00-'06 (WJ'99-'04) '00-'02 can CRACK! '03-'06 TUPY are better/no cracking/stronger
-have coil pack mounting tabs
-smaller/raised exhaust floor ports for faster warm up of catalytic converters and improved emissions
mill 0.010" = 1.4cc combustion chamber reduction, 0.007"=1.0cc
XJ Lowered Shocks-
Bilstein 5100 Series, 2" body, 46mm piston
-Front 33-186504 (old #F4-BE5-6140-T5) Ext-18.46" Collapse-11.77" Travel-6.65" off of- ? F150
-Rear 33-186566 (old #F4-BE5-A827-T5) Ext-16.46" Collapsed-11.12" Travel-5.3"
off of- 1999-2006 Chevy Silverado1500, GMC Sierra 1500
Jeep Front Springs XJ, MJ, TJ, LJ
Stock - 145 lb/in
Rusty's 4.5" - 150 lb/in
Rusty's 6.5", 8.5-9", HD 3" - 180 lb/in
TNT 5.5" - 201 lb/in
Rubicon Express 4.5" #1310 - 164 lb/in
Rubicon Express 5.5" #1345 - 184 lb/in
Rubicon Express 7.5" #1358 - 213 lb/in
Cutting Coil Springs
Here is a good explanation on cutting springs to lower-
http://www.eatondetroitspring.com/cutting-coil-springs/
"The first thing you need to know is that cutting a coil spring will not only lower the vehicle, but it will also stiffen the spring making the ride and handling a bit firmer. But this is a good thing because lowering a vehicle reduces the amount of suspension travel. A stiffer spring will help reduce bottoming out."
A 200lb/in spring with 10 coils, 1" movement requires 200lbs and each coil moves 0.1" with 200 lbs. If this coil is cut in half, to 5 coils, that same 1" movement will require 0.2"/coil compression and that will require 400 lbs for 1" compression. So now the same spring when cut is rated at 400lb/in. The spring material/thickness is the same, but the spring rate is different.
RING GEAR SIZE
Dana 30/35 = 7.6"
Chrysler 8.25 (Who lives in Grant's tomb?)
Dana 44 = 8.5"
Ford 8.8 = yep 8.8"
Dana JK44 = 8.9"
Ford 9" (duh)
Dana 50 = 9.0"
Dana 60 = 9.75"
Dana 70 = 10.5"
Sterling 10.25
14 Bolt = 10.5"
Dana 80 = 11.25"
Jantz Engineering-
54- D50 gears in a D44 housing (9.0" replaces 8.5")
76- D70 gears in a D60 housing (10.5" replaces 9.75")
AXLE PINION ANGLE
Lift........Non-CV......CV
lift=0".........6........... 10
lift=2".........6............12
2.5-3".........6............14
lift=4-5"....11...........15
5.5-6"........12...........17
lift=7"+.....14...........18
ProStreet Jeep
400CID SBC V8 31"x14.5" slicks
11.59 117mph
11.77 115mph
+250 shot Nitrous
9.96 136mph
9.93 136mph
