I recently purchased a project motor. My Jeep is an 05' Rubicon TJ with 6-speed and a strong running 150,000 mile original 4.0. I purchased an 05' long block along with a Magnum Power Super Charger from a local sale. Original user got fed up with fueling issues, overheating, etc. and opted to pull the motor for an LS swap. So, I decided to head down another rabbit hole with hopes for a fun build.
The donor block came with an edelbrock performance head and has some slight scoring on #4 & #5 cylinder. I dropped it off to a reputable engine builder and was told it was salvageable. Now, said builder can't get to tear-down/fabrication for a few months due to other engine builds in progress (I guess a wait means this builder is good). So, I have time to plan out my path forward. I'm rebuilding my NSG-370 and am awaiting an Atlas twin-stick so when the time comes, I'll pull the drive-train and do everything at once. My options are:
1. Hone the cylinders and build the 4.0 back to spec with SCAT rods & pistons & Edelbrock head
2. Build to 4.7L stroker, forged internals & Edelbrock head
Both options will permit me to ultimately decide whether or not to add more power with the super charger install. At least forged pistons and rods will be installed but do I need to decide if the supercharger will be run or not to help the builder decide on camshaft, piston selection, etc? Doing some research, seems like the stroked 4.0L runs hot, adding a supercharger to the mix will probably make it run even hotter. I'm prepared to revamp the cooling system with a new radiator, shroud, E-fan, hood louvers and so-on. I also realize that a good tuner can make or break this build. Looks like this website has brought me front and center to some good tuners still tuning our TJ's.
Your thoughts?
The donor block came with an edelbrock performance head and has some slight scoring on #4 & #5 cylinder. I dropped it off to a reputable engine builder and was told it was salvageable. Now, said builder can't get to tear-down/fabrication for a few months due to other engine builds in progress (I guess a wait means this builder is good). So, I have time to plan out my path forward. I'm rebuilding my NSG-370 and am awaiting an Atlas twin-stick so when the time comes, I'll pull the drive-train and do everything at once. My options are:
1. Hone the cylinders and build the 4.0 back to spec with SCAT rods & pistons & Edelbrock head
2. Build to 4.7L stroker, forged internals & Edelbrock head
Both options will permit me to ultimately decide whether or not to add more power with the super charger install. At least forged pistons and rods will be installed but do I need to decide if the supercharger will be run or not to help the builder decide on camshaft, piston selection, etc? Doing some research, seems like the stroked 4.0L runs hot, adding a supercharger to the mix will probably make it run even hotter. I'm prepared to revamp the cooling system with a new radiator, shroud, E-fan, hood louvers and so-on. I also realize that a good tuner can make or break this build. Looks like this website has brought me front and center to some good tuners still tuning our TJ's.
Your thoughts?
