POWERSTORM GM LS7 429CI PRO SERIES SHORTBLOCK 11:1 COMPRESSION
- Product Information
- Vehicle Fitments
Note; shown with optional cam & retainer installed.
Pro Series Details & Specifics
Deck Plate Honing
Deck plate honing is used to ensure that the cylinder bores are as round as possible during the honing procedure. Normally when a cylinder head is bolted to the engine, the load of the bolts/studs being torqued causes the bores to deform. Most factory honed blocks at the OEM level, as well as most basic rebuilds, just employ honing the block without any kind of torque plate to replicate the stresses and bore deformation. While this still allows for a decent finished product, it leaves some performance on the table. Livernois uses a custom deck plate in order to perfectly replicate these stresses, and to ensure that the bores are perfectly round to ensure maximum ring seal and performance. Livernois uses it's own in house CNC department to make custom deck plates that exactly match the cylinder heads, which takes deck plate honing even one step beyond just using the more readilly available deck plates which are just ordinary pieces of aluminum.
In order to properly set main bearing clearances, as well as establish the proper crush on the main bearings, Livernois align hones every single engine we build. For a lot of our competition, align honing is an extra cost add-on, but at Livernois we're serious about performance and durability, and align honing the main bearing bores and setting main bearing clearance and bearing crush is a must, so we do it on every engine. This procedure uses a specific align honing machine, that uses an adjustable mandrel that has custom ground stones on it to hone out the main bores. This method involves checking bearing clearance and housing bore sizes, then determining the correct size the bores need to be and honing them to achieve this size. While our competition may skimp and omit this procedure, we believe strongly in need to align hone and properly set bearing clearances and bearing crush, on every engine we build.
Rod Bearing Clearances
Another critical area of the engine is the rod bearings and setting rod bearing clearance. In order to ensure the correct rod bearing clearance, along with the correct bearing crush, we go through and measure and set every rod bearing clearance, on every engine we do.
Block Deburr & Radiusing
Each engine is carefully hand deburred to ensure that stress risers and sharp edges are removed from the blocks. This is an important step, ensuring that the block will hold up at higher power levels. Some of the deburr work is to remove sharp edges to aid in assembly work, while other deburring is done to remove sharp edges that cause stress risers and potential wek points.
Oil System Modifications
In order to ensure proper oil delivery to all the bearing surfaces in the engine, Livernois sepnds extra time modifying oil passages to remove flow restrictions. Beyond those steps Livernois also modifies oil holes for increased flow under pressure, and to ensure correct oiling at higher RPM and loads.
Powerstorm pistons are designed exclusively by Livernois and only available through Livernois Motorsports. Each design is developed to match the specific needs and requirements of the engine and application. Where as most companies just use "off the shelf" pistons, Livernois know's that in order to achieve maximum performance and reliability that you can't just settle for off the shelf parts. Taking from over a decade of building winning race engines, alongside the extensive time spent working with OEMs on development, Livernois designs each piston to be a perfect fit for the application. Features like increased ringland thickness, increased skirt thickness, added struts and bracing, revised ringland stack, custom skirt profile, and many other things, all go into making a Powerstorm designed piston the best piston on the market.
Powerstorm connecting rods and designs have become the industry standard design for many different engine families. From our H-beam design, to our higher end I-beam offerings, these rods are designed to handle the increased horsepower and torque of a modified performance engine. With standard features like ARP2000 upgraded bolts and precision tolerances of just .0001, these rods are the best available.
Each crankshaft is precision balanced, and treated to a variety of treatments in order to ensure the best possible performance and durability. Our own in house CNC modifies the oil passages for increased flow, while added polishing steps ensure a perfect surface finish.
- LS7 Aluminum Block
- Forged Crankshaft
- Powerstorm Custom Sleeve kit
- Powerstorm Forged Pistons
- Stainless Steel Ringset
- Thick Wall Tool Steel Wristpin
- Powerstorm 4340 Forged H-Beam Connecting Rod
- Tri-Metal Performance Coated Main Bearings
- Tri-Metal Performance Coated Rod Bearings
- Powerstorm Main Stud Kit
Machine & Assembly Work
- Deck Plate Honed Cylinders
- Main Housing Bores Align Honed
- Block Deburr and Radiusing
- Oil System Modifications
- Balance Rotating Assembly
- Rod Clearances Set
- Rings Hand Gapped and Filed
- Shortblock Assembly