AMS Mitsubishi Lancer Evolution IV/V/VI/VII/VIII/IX 2.3 Stroker Short Block


The AMS EVO IV/V/VI/VII/VIII/IX 2.3 Stroker Short Block is the ultimate solution for low RPM torque. With an increase in displacement to 2.3 liters, you can expect a 10-15% increase in torque and a 400-500 rpm increase in spool up. Road racers will pull through corners better and drag racers will benefit from boost response after shifts.

We use only the best off the shelf and custom designed AMS spec components. Combine that with the latest in machine and assembly practices and you are assured only the best!

All our engines are hand assembled at AMS using the same care as the engine in our world record holding, 1142 awhp AMS EVO VIII. Every motor is balanced, blueprinted and assembled to AMS’ exacting standards.

Before assembly each block is checked for correct dimensions, cylinder bore, mains, block flatness, etc… to ensure you get the best foundation for your new engine. Every engine we assemble has a build sheet where tolerances, torque specs, and clearances are documented.

An exclusive feature on all AMS EVO short blocks is our Race Balance Shaft Eliminator Kit. We do not use stub shaft conversions that can cause catastrophic oil pump failures.

Features

* Pistons are 2618 stock, heat treated to T61 condition for better durability
* Forged 4340 aircraft quality material and shot peened H Beam or I Beam Rods
* Moly/Graphite treated TriArmor cleavite bearings
* Premium grade material, heat treated with a black oxide coating head studs
* Precision AMS spec machine work on block & crank
* Precise, documented hand assembly

Includes

* Ross pistons with the AMS specially designed quench area
* Manley rods
* ARP main stud kit
* AMS Race Balance Shaft Eliminator Kit
* High performance rod & main bearings
* Precision AMS spec machine work on block & crank
* Precise, documented hand assembly

Available Options

* Upgraded Rods
* Head Studs
* Upgraded Crankshaft
* O-ring block - copper wire
* Mitsubishi oil pump
* Mitsubishi timing belt & tensioner
* Power Enterprise timing belt & factory Mitsubishi tensioner
* 4G63 engine gasket set Evo 8
* 4G63 engine gasket set Evo 9
* Core charge – block, crank, oil squirters and squirter bolts **
* Custom compression ratios are available, lead time is approximately 3-4 weeks.

Specifications

* Displacement: 2.3 liters
* Stroke: 100mm
* Compression Ratio: 8.9:1 (custom CR available)

Application

* Mitsubishi Evolution 4, 5, 6, 7, 8, 9


**GOOD CORE REQUIRED: 2.0l short block core must include a usable block w/ oil squirters, oil squirter bolts and 2.0l crank with main caps.

Part Number: AMS2SSSBEVO89