TSP 427 CID 630 HP LSx Turn-Key Package


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SKU: 25-TKLSx427630HPPkg Categories: ,

Texas Speed & Performance’s turn-key engine packages are your solution for powerful, durable, and trouble-free late-model LSx power plants for your muscle car or hot rod! Each package is precision machined with state-of-the-art CNC equipment that allow for the strictest of tolerances, and every TSP engine is hand-assembled by experts that deal ONLY with LSx-based engines! All of our engine machining and assembly, as well as our cylinder head production, is in-house and NOT sourced out. All components in our engines are brand new parts, including the block, so you are not buying an engine that uses any remanufactured items! We are the only LSx-based company that digitizes and blueprints every engine block on a CNC machine to the factory GM specifications! Our turn-key packages are designed to provide our customers with a true drop-in engine that is ready to run! These are not stock crate engines that have been slightly modified. These are hand-built engines that have received the care and attention that you should expect when purchasing an engine! Our engines are built for strength, durability, and power, so your new TSP turn-key engine is ready for whatever you can throw at it!

The TSP 427 CID 630 HP LSx Turn-Key Package will have a slightly lopey idle and will work with a factory torque converter. This package will include the following items:

GMPP LSx Iron Engine Block
Texas Speed & Performance Forged 4340 4.00″ Stroke Crankshaft
Texas Speed & Performance Forged 6.125″ Connecting Rods
Wiseco 4.127″ Forged Piston Set with Steel Top/Napier 2nd Ring Set
11.1:1 Compression Ratio
Precision Race Components 285cc Aftermarket 6-Bolt LS7 Cylinder Heads with TSP Dual Valve Spring Kit with PAC .660″ Springs & Titanium Retainers
Texas Speed & Performance Custom-Grind Hydraulic-Roller Camshaft
Texas Speed & Performance Hardened Pushrods
Johnson 2110 Lifters
ARP 12-Point Head Stud Kit for 6-Bolt Cylinder Heads
Cometic MLS 6-Bolt Cylinder Head Gaskets
GM Rocker Arms with Comp Cams Trunion Upgrade Kit
Stainless Steel Hardware: Intake Manifold Bolts, Timing Cover Bolts, Valley Cover Bolts, Water Pump Bolts, Thermostat Bolts, & Oil Pump Bolts
Texas Speed Billet Baffled Aluminum Center-Bolt Valve Covers With Billet Catch Can Kit
Remote Coil Pack Relocation Mounts for a Clean Look Under the Hood
GM Hot Rod Oil Pan Kit as Standard
Multiple Front Drive Systems to Choose From
GM LS7 Intake Manifold Assembly: Includes Manifold, Fuel Rail, Fuel Injectors, and GM LS7 Electronic Throttle Body
GM Throttle Pedal
Complete GM Sensors
New Ignition Coil Packs
MSD Universal Cut-to-Fit LS1 Spark Plug Wire Kit
Holley Terminator X System with option for additional Trans Control Module for 4L60E/4L80E
GM Front Oxygen Sensors
GM Mass Air Flow Sensor
GM Starter
12 Quarts of Joe Gibbs Break-In Oil
AC Delco Oil Filter
GM Flywheel or Flexplate

All of our TSP turn key engines will include a Holley Terminator X Max engine management system with optional transmission control for an additional charge. Terminator X Max features real-time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Part number 550-928 also has 4L60E or 4L80E Transmission control and Drive-By Wire Throttle Body control. Terminator X Max comes fully loaded with base maps for common LS engine combinations to get you out of the garage and on the road/track fast. The 3.5″ touch screen LCD handheld contains an easy to use calibration wizard as well as tuning and gauge display functions. Also included is Holley EFI’s industry-leading, easy to use software suite that allows full laptop access for advanced users.

All of our turn-key engine packages will come standard with the TSP billet aluminum valve covers with a coil pack relocation kit and GM Hot Rod Oil Pan Kit. However, we do offer upgrades for all of these items, which are listed below in the drop-down menus. Let us know if you are looking for an item that is not listed, and we will be glad to provide you with a price! The aluminum coil pack relocation kit allows you to hide the ignition coil packs anywhere you would like under the hood, which provides you with a clean and uncluttered engine bay.

All Texas Speed & Performance turn-key engine packages will come standard with a one-year, unlimited-mile warranty as standard! This will require all tuning to be performed by us. We stand behind our work, and when you purchase a Texas Speed & Performance engine you are not only buying the parts but also the knowledge, experience, and know-how! We have completed many LSx-based engine retrofits at our facility, and we KNOW what works and what is required to complete the installation!

We do recommend verifying the necessary clearances for both the front drive accessories and the oil pan kit. The kits that we have listed work with the majority of setups, but every car does vary! It is the customer’s responsibility to verify these measurements BEFORE placing the order. Once these items are installed on your engine and shipped out, they are not returnable. Feel free to give us a call to discuss your setup with us, and we will be glad to assist you in determining what your vehicle will require!

All TSP engines will include two oil changes worth of Driven Racing break-in oil for no additional cost. Proper break-in oil and procedures for your engine are just as important as the build process! The Driven Racing break-in oil allows for proper ring sealing against the cylinder walls upon start-up, as well as for the break-in period once the engine is up and running. Most off-the-shelf engine oils do not have the necessary ZDDP additives to allow for proper break-in of a new engine, and we want to take every precaution possible to ensure that your new TSP engine receives a proper break-in! We also offer the Driven Racing oil for your new engine once your break-in is complete. We recommend using either the HR2 conventional non-synthetic or the LS30 full synthetic oil. Please note that the Driven Racing LS30 is the ONLY synthetic oil we recommend using in your engine because it retains the necessary ZDDP additives.

Note: The engine in the picture has optional valve covers, ignition coils, and Billet Specialties front drive system.

Additional information

Weight 600 lbs
Dimensions 1 × 1 × 1 in


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