dieing 4.0 problem

[gearhead1985]

well i have a 92ish jeep wrangler with a dieing 4.0 it has a mild case of lifter tick, some rod knock and piston slap so it needs a major overhaul instead of just rebuilding it i am going to make it bigger and better via a 4.7 long rod stroker since i will be reworking the suspension next month now is the time for the build

so here is the plan

Jeep 4.2L 3.895" stroke crank
Jeep 4.0L 6.125" rods
IC944-060 pistons
9.36:1 CR according to the calculator
CompCams #68-231-4 206/214 degree camshaft
a stock 7021 HO cylinder head that is gasket matched
Mill block deck 0.020"
Mopar/Victor 0.043" head gasket
0.050" quench height
Ford 24lb/hr injectors with adjustable FPR
99 4.0 intake
stock exhaust manifold with a 2.5" exhaust all the way back
and bore the taper out of the throttle body and gasket match the intake


here is what it is going in

right now it has d44's f&r but is getting a ford 9" rear spooled with 5.13's and the welded front and matching gears

so is there any thing i need to do or not do also what should i do about the computer

[Cheromaniac]

Since your Jeep is a '92 it'll have the OBD1 engine controller in which case, you don't need to do anything to it. Just get the correct size injectors (Ford 24lb'ers) and fine tune the fueling either with an adjustable FPR or a MAP adjuster so that you'll have a WOT air/fuel ratio near 13:1.

[gearhead1985]

Since your Jeep is a '92 it'll have the OBD1 engine controller in which case, you don't need to do anything to it. Just get the correct size injectors (Ford 24lb'ers) and fine tune the fueling either with an adjustable FPR or a MAP adjuster so that you'll have a WOT air/fuel ratio near 13:1.

ok what is the best way to monitor the afr's

a wide band o2 and a gage

[Cheromaniac]

ok what is the best way to monitor the afr's

a wide band o2 and a gauge

Exactly.