High Comp 4.6 Torque Monster
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- Noob
- Posts: 14
- Joined: October 14th, 2022, 3:34 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: ZJ
- Location: Oklahoma
- Contact:
High Comp 4.6 Torque Monster
Started building this several years ago in New Jersey. Finished the build, but moved to Oklahoma before installing it. Good thing, too. The white '95 ZJ died of rust, transfer case & fuel pump failures. Replaced it with a red '95 from Missouri; some rust, but not structural. It now sports the new Stroker.
The block is a '96 with the locator dowels in the block for the head, and the main girdle.
Crank is brand new from Clegg's, with the forged 10.8 CC pistons. Cam is Comp Cams Rock Crawler: Intake lift 0.460", duration 250*; Exhaust lift 0.476", duration 256*; Overlap 26*. Cylinder head is a 2004 TUPY. I did a mild porting on the exhaust ports, mild port and Powre Lynz on the intake ports, Powre Ringz on the valves, and 3-angle seats. Combustion chambers were radically radiused, and Somender Singh Grooves were added. It was milled just enough to make it flat. Chamber volume is 60 CCs.
Painted the block & head Ford Blue, because it matches my company's logo. I powder coated brackets and the valve cover.
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- Noob
- Posts: 14
- Joined: October 14th, 2022, 3:34 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: ZJ
- Location: Oklahoma
- Contact:
Re: High Comp 4.6 Torque Monster
Initially I used the stock intake. I acquired a newer "horseshoe" version, which I blasted & powder coated. It features the Powre Lynz in the intake ports from the injector bosses towards the port.
In order to use the newer intake manifold, I had to do something with the power steering bracket. The '96+ spins the water pump in the opposite direction. I acquired a '96+ PS pump bracket, which I powder coated. Decided to get it to work with everything else stock. The factory bracket has a tensioner pulley designed to run off the back of the belt. I found a Gates 38082 grooved pulley that lets me run it on the inside of the belt. A longer belt was needed; Gates K060990 was used, but it could stand to be a bit shorter. The stock pulley was pulled up. I needed it to pull down, which required a new bolt fed up through the bottom (had to drill the hole bigger).
While doing the intake swap, I did a header wrap on the factory exhaust manifold. I've heard of injectors #3 & 4 failing from heat. Plus, with a 10.2:1 compression ratio, I had been getting detonation/pinging. The exhaust wrap made an extremely noticeable difference on pinging.
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- Noob
- Posts: 14
- Joined: October 14th, 2022, 3:34 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: ZJ
- Location: Oklahoma
- Contact:
Re: High Comp 4.6 Torque Monster
Here are the parts I used for the intake swap:
Vacuum ports are different between the manifolds. The old one used 1/4" NPT ports for screw-in nipples. The new one only had two 1/4" NPT ports, and 4 permanent nipples. Power brake was obvious. The IAT moved into one of the screw ports. I used the other for CCV/PCV. Had to get creative for the MAP sensor. One hose fits the port on the MAP, a bigger hose fits the port on the manifold. The 2 hoses fit snugly together.
I added a catch can. The CCV/PCV uses 2 different barbed nipples; the one with the small orifice usually goes in the rear grommet. I swapped them. Also, there is a power brake booster check valve on the front one. The idea is to put manifold vacuum on the crankcase. Want to make more power? You can build more pressure on the top of the piston, or reduce pressure on the bottom; both work. Also, over time, vacuum on the crankcase will slow vacuum leaks. Instead of leaking oil out, it sucks minute amounts of air in. That silver canister inline on the front tube is a Smart Emissions Reducer (fractures and ionizes the crankcase gasses, making them more combustible).
This is the short version of the build and integration. I have about 600 miles on the engine so far and am quite happy with the results. Very little throttle and it lunges forward. It pulls from just off idle to about 3500 RPM. By 3800 RPM it's done. This is what I was wanting -- incredible low-end torque for towing, and excellent fuel economy (which I am still working on).
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-
- Noob
- Posts: 14
- Joined: October 14th, 2022, 3:34 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: ZJ
- Location: Oklahoma
- Contact:
Re: High Comp 4.6 Torque Monster
I have a more detailed build thread on the JeepForum; "High Fuel Economy Stroker Build" (https://www.jeepforum.com/threads/high- ... d.4467732/), with details of mods and upgrades to the rest of the vehicle; "Time to Trade In" (https://www.jeepforum.com/threads/time- ... n.4480984/).
-
- Noob
- Posts: 14
- Joined: October 14th, 2022, 3:34 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: ZJ
- Location: Oklahoma
- Contact:
Re: High Comp 4.6 Torque Monster
Correction:
The belt I originally bought was the above-mentioned Gates K060990, which ended up too short. I remeasured and the tape measure still said it should work. I ordered a Gates K061031, which is on it now. That's the one that could be slightly shorter and work a tad better.
The belt I originally bought was the above-mentioned Gates K060990, which ended up too short. I remeasured and the tape measure still said it should work. I ordered a Gates K061031, which is on it now. That's the one that could be slightly shorter and work a tad better.
-
- Noob
- Posts: 14
- Joined: October 14th, 2022, 3:34 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: ZJ
- Location: Oklahoma
- Contact:
Re: High Comp 4.6 Torque Monster
I have almost 2k miles on the new engine now. To do over, the one thing I would certainly change is my choice of piston rings. I opted for the "upgrade" Chrome rings. I wish I would have used the Molly rings instead. At <2k miles it still uses too much oil. There are no external leaks. I can see oil on the spark plugs. The chrome rings just aren't seating yet.
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