(thats a movie quote if anyone knows their late 90's movies)
im happy to report that after months of researching, posting, collecting parts (used & new!), ect... the stroker builds are taking the next big jump - machine shop time!
ive made reference to this in some of my initial posts on the forum, but a friend and i are building near identical 4.6 strokers for our lifted XJ's. my initial stroker plan was for my lifted 95 XJ however i bought a stock 00 XJ and swapped all my lift parts, bumpers, tires, ect over. i also picked up a spare 99 long block which i will be using for my stroker build. the 95 xj was converted back to stock and sold. my friend has a 98 XJ and is also using a 99 donor block
*** our goal was to keep our builds relatively simple/basic as we are not trying to squeeze every last hp and we want to maintain reliability as we often go into the trails. pump 87 or 89 would be ideal however we may have to use 91 or 94 in the summer months (87 is roughly $1.40/L or about $5.40/G!). we are also basically at sea level.
moving on to the build details...
playing with the stroker calculator, we've come up with the following:
4.2L 3.895" stroke crank
4.0L 6.125" rods
Keith Black UEM-IC944-030 pistons (21.7 dome)
stock 99 cam (Intake 253.3/Lobe 107.3)
Ported HO cylinder head (58cc)
block deck 0.0215
Mopar/Victor 0.043" head gasket
this yields a SCR 9.24, DCR 7.98, Quench .0645
in another thread it was mentioned the later stock cam intake was actually 256 duration, which would drop the DCR to 7.92. more info on the heads below.
My 00 4.6:
99 block
12wt crank (10/10)
kb 944 .030 pistons
4.0 shot peened rods
clevite cam, crank, rod bearings
Rollmaster dual timing set
stock 99 cam
99 intake w/ true 60mm tb
7120 head conversion. stock. (plan to do slight p&p)
Victor Reinz gasket kits (w/ .043 mls hg)
Buddies 98 4.6:
99 block
4wt short nose crank (10/10)
kb944 .030 pistons
4.0 shot peened rods
clevite cam, crank, rod bearings
Rollmaster dual timing set
stock 99 cam
99 intake w/ true 60mm tb
0630 head conversion. stock. (plan to do slight p&p)
Victor Reinz gasket kits (w/ .043 mls hg)
Yesterday i dropped our heads off at the machinist. they were disassembled to make inspecting them easier and we plan to do a basic p&p following the Standard Abrasives guide. stock valve train will be reinstalled as we are thinking of sticking with the stock cam. the magnum ss valves are being consider (2.02/1.62) but we are on the fence. the heads were original and im assuming they would be only needing to take off 3-5 thousandths meaning it could reduce the CC to 56 roughly, increasing the SCR to 9.4 and DCR to 8.07/8.13 levels... some consider this on the borderline with avoiding pinging.
both donor blocks will be dropped off within a week after completing the last bit of tear down. still need to pull the pan/crank/rods/pistons. ideally id like to deck the blocks some to tighten the quench however the DCR is already on the thresh hold imo.
we are also considering a mild performance if we can retain stock valve springs to keep the cost/simplicity down. we rarely take it past 4000rpms to peak power or hp isnt a priority. the Comp 68-201-4 is being considered as its on the limits of the stock valve springs, helps the most in the rpm range we use, and improved the DCR slightly.
we've got our larger injectors (forgot the #'s at the moment) and plan on doing some fine tuning with an SAFC. my recent previous job was working at performance tuning shop which included dyno tuning - ill likely strap it on for logging/tuning.
im planning on building a 2.5" front pipe with flex section and purchasing a mud frog 2.5" cat back system
ill be posting pics through the builds
