ATK 4.7L V8 Baja Stroker Jeep Engine - HP88

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  • ATK NORTH AMERICA | Part Number: ATKHP88
  • Engine Configuration:L6
  • Engine Type:Long Block
  • Fitment:Universal Fit
  • Displacement:242


Produces 270 HP and 320 pound-foot torque. This is the engine combination that won the Baja 1000 for Team ATK. Other modifications may be needed (Injectors, Throttle Body, ECU, Exhaust ect.) Engine Type: AMC Straight 6 cylinder Displacement ( 242 Bore/Stroke: .040-.060 x 3.906 Crankshaft: Scat Nodular Steel Rods: OE 6.125" Pistons: Forged Dished Compression: 9.3:1 Rings: Moly Camshaft: Flat Tappet Camshaft Lift: lift .484 x .507 Camshaft Duration @.50:213x220 Cam Specs: 213/220 @50 .487in/.507ex 112LSA Cylinder Heads: Ported OE Cast Iron #686 Rocker Arms: Harland Sharp Billet Aluminum Roller Recommended Fuel: 92 Octane + Max RPM: 5300 Warranty: 1 year/12,000 miles For your engine core return, the engine core needs only to be the same type as the ATK engine supplied, complete and with no visible damage and be able to turn over 360 degrees. Core pickup is easy. Place it in the crate and call the pickup number provided with the bill of lading. We pay the freight back. We will contact you after the sale for your vehicle VIN number, cylinder block and head casting numbers. **Retail price does not include the manufacturer core charge. A sales rep will contact you when your order is received regarding the core charge and availability.



Question & Answers

12 Answered questions

What parts do I need to buy to make this engine ready to drop in and start up. Also how much boost can the engine handle.

Asked by Stephen the Wheel Man from on

Hello Other than standard parts off your old motor. larger injectors, throttle body, header and exhaust system larger. They say they can handle up to 20 pounds of boost. Thanks

Answered by Rody from on

What about a motor like this to replace my 4.0L HO in my 95 Cherokee? What is the MPG like for this type of motor? What is the ship time?

Asked by Cherokee rider from Eddington,ME on

Hello Most of the customers have kept close to the stock mileage after they stop hot rodding around with the extra power. If you drive it the way you drive with the current motor you may loose up to 2 mpg's. Ship time is normally within 2 to 3 weeks for you to receive the motor. Thanks

Answered by Rody from Eddington,ME on

will this engine be as durable as the stock 4.0 engine in a 2000 jeep cherokee. How many miles do people usually get out of these engines. Comparing the atk 4.0 straight replacement and the 4.7 stroker engine with the 205 HP and 270 torque and this engine which one would be most reliable and what would the mpg difference be between the 3? Also would the lower 205 HP 4.7 stroker engine give plenty of power especially when passing cars and at take off to where this engine might not even be needed? thanks I have a 2000 jeep cherokee sport

Asked by Newbie from on

The durability part is hard to answer not knowing the driving conditions you put the motor under. The motor would last as long or longer than the factory 4.0 in most vehicles. My TJ 4.0 has 250,000 miles we rebuilt my daughters 4.0 at 189,000. The stroker motor having more power you don't need to work it as hard as the stock. I have guy's that are getting within 1 mpg as the worn out stock motor. If you are in hilly terrain you may gain mileage. Not knowing a lot about your Jeep if it has bigger tires,gears changed, it is a little hard to give you all the answers you are looking for. Thanks

Answered by Rody from on

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As the largest private label crate engine remanufacturer in North America, ATK has been around for over 80 years producing parts including high performance engines, transmissions and rear axles. When your Jeep needs an engine rebuild, an ATK remanufactured engine uses reverse engineering processes to virtually eliminate factory defects that hinder performance. One reason ATK is at the forefront of engines is their adherence to thorough cleaning and inspection techniques and their machining and magnafluxing capabilities. If staying out of the garage and out on the trail is a priority, rely on ATK to get your 4x4 up and running. Shop ATK NORTH AMERICA Now