Blueprint Engines GM LS 427ci Dress Retrofit FI Engine, Fuel Injected
138-PSLS4272CTF
Product Q&A
View Now
Retrofit Engines
Recommended Stall Converter: 2200+ RPM
Recommended Fuel: 91 Octane
Engine Break-In Procedure
Use or break-in oil or conventional (non-synthetic) multi-viscosity oil with zinc additive for the first 500 miles of operation. Avoid hard acceleration for sustained periods. Periodically change the engine speed while driving to help seat the rings. While the engine is running, be sure to check oil pressure and coolant temperature, and check for fluid leaks, such as oil, transmission fluid, fuel, and coolant/antifreeze. Also listen for any unusual sounds. Should you hear an unusual sound, shut the engine off, check for the source, and correct it.
Engines with flat tappet cams only - Start the engine and bring it to 2,000 RPM. Get the engine running smoothly. Then vary the engine speed from 1,800-2,200 RPM in a slow acceleration/deceleration cycle for 30 minutes. This is necessary to provide adequate oil splash and lifter rotation to properly mate each lifter to its lobe.
At 500 Miles change the engine oil and filter using conventional (non-synthetic) oil. After 6,000 miles, synthetic oils can be used in your engine. For flat tappet cam engines, continued use of oil with zinc or a zinc additive for the life of your engine is recommended.
Specifications:
Will this engine handle a turbo
I have a 2013 camaro rs but want to do a engine swap will this fit
I have a 1999 Pontiac Trans Am WS6, Will this engine fit my application and what additional parts will I need? Also, will it accept a 150 hp nitrous kit?
Hello, I have a 2015 Camaro with an LS3, want to swap out for an LS7. With this engine fit in my 5th gen camaro ?
Will this fit a 2008 Chevy Silverado LS 4x4?
How much does this engine weigh as delivered?
end of year i will start on my 59 corvette build. Ive never gone LS, always bbc. I really want the sound of a radical cam. Is this engine built with a wild sounding cam that will impress at car shows, can you build with that cam and keep hi pwr level?
I am looking to do an LS swap on my Nissan 350z. The company doing the swap has a kit they provide. Would this motor be sufficient enough for a single or twin turbo application or supercharging?
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.