Remanufactured parts meet GM approved service part requirements and are made from previously used components in a process that involves disassembly, inspection, cleaning, update of software and replacement of parts as appropriate, testing, and reassembly.
Refurbished parts meet GM approved service part requirements and are previously used parts that are inspected, cleaned, tested, and repackaged.
How do I buy Chevrolet Performance?
How much camshaft lobe profile change can I run in my engine and still retain the factory fuel injection set-up?
The fuel injection "Set-Up" consists of several different components including an ECM (Engine Control Module), software calibration and matching engine components (i.e. fuel injectors, cylinder heads, camshaft, ect). The ECM calibration and Fuel Injectors are designed to work well with the supplied cam shaft. Changing any components that affect fuel consumption and emissions, may require a different calibration and/or fuel injectors. GM does not provide or support the use of any ECM calibration other than the one provided with the ECM.
What do I need to run a Chevrolet performance engine in my vehicle
Chevrolet Performance makes every effort to ensure our engines and related parts install easily into many vehicle applications. It is impossible to design these parts to be a perfect fit for all applications since they are used in a wide variety of vehicles. However, all engines will require some basic components to operate. These include a sufficient fuel supply and a clean 12 volt power supply and ground to run the ignition and charging systems.
What are the flow numbers for Chevrolet Performance Heads?
The flow rates for several Chevrolet PP heads are included in the 2007 Chevrolet Performance catalog (See pages 228 - 230 for the flow rate of the LS2, LS6, and LS7 heads). The GM PP catalog is regularly updated as new information becomes available.
How do I get sponsored/parts donated/contingencies from Chevrolet Performance?
GM is not currently seeking any additional teams or organizations for sponsorship.
Are the engines pre-run on a dyno? Or come with a dyno sheet?
During the design phase, every GM performance engine must pass rigorous dynamometer testing. During these tests, each engine design is run at maximum torque and horse power RPM for up to 50 consecutive hours. The results of these dyno tests can be found in the GM PP catalog for each engine. Once an engine design has passed all of our testing, the design can be put into production. All GM performance crate engines are shipped with all new, never run, parts and are not individually dyno tested.
I want the fuel lines to connect to the other side of my (12355612) fuel pump. Can this be changed?
Yes. The 12355612 fuel pump can be turned (clocked) to any one of ten different positions. Simply remove the ten bolts that hold the pump halves together, orientate the pump to the desired position and reinstall the bolts to the proper torque.
Can I use synthetic oil during break in of my new engine?
No, Petroleum based engine oil should always be used during the engine break-in period.
Where do I hook up my electric choke?
The positive (+) spade on the choke cap needs a wire from a fused 12v source that is hot (has voltage) anytime the key is on (preferably from fuse box). Do not hook to the positive wire going to the coil. The neg. (-) spade on the choke cap is pre-wired and grounded to the carburetor.
NOTE: All wiring must be properly fuse protected to prevent damage to the vehicle's electrical system and/or personal injury. Please refer to the proper service information for correct wire and fuse usage.
My crate motor experienced a backfire. How do I know if the Carburetor's Power Valve was damaged?
Since 1992 all Holley Carburetors have backfire protection built into them. It is unlikely that a backfire will cause any damage to the Carburetor. However, it is possible that an extreme backfire may create more percussion than the backfire protection can handle. If the engine experienced an extreme backfire, the Power Valve can be tested by turning the Idle Adjustment Screws all the way in with the engine idling. If the engine stalls, the Power Valve is not damaged. Reset the Idle adjustment Screws to their original starting position.
Are there any adjustments that will need to be made after installing a "Turn-Key" engine?
Yes, Engine and vehicle performance is greatly affected by items such as Transmission Type, Vehicle Weight, Tire Size, Torque Converter, Altitude, Temperature, Humidity, and even Terrain. Turn-Key engines are factory set to work well in a variety of conditions and applications but items such as Carburetor and engine timing adjustments should be made for optimum drivability and performance on every engine.
Are adjustments and tuning covered under my warranty?
No, any work and associated costs related to installation, adjustment, set-up or tuning is the responsibility of the Owner.
Is there any tuning or adjustments that need to be done to a Fuel Injected engine?
All fuel injected engines require an Engine Control Module (ECM) to operate. ECM's are small computers that use a calibration that is specific to each engine configuration. When installing a fuel injected engine in a vehicle, it is critical to have an ECM with the correct calibration for your specific engine. Refer to the Chevrolet Performance catalog or your local Chevrolet Performance dealer to find out if a calibrated ECM is available for your engine. Additionally, fuel Injected engines that use a Distributor will also need to have the ignition timing set.
Can I replace parts on my Chevrolet Performance engine without voiding the warranty?
Yes. However, GM will only warranty engines and components against a defect in GM's material or workmanship. The warranty does not cover damage caused by improper installation, negligence, or damage caused by the installation of parts that are not approved by GM.
What is the best way to clean my Chevrolet Performance Dryflow air filter?
Dryflow air filters can be cleaned by removing the air filter from the vehicle and gently swishing it in a bucket filled with a diluted solution of water and mild dish soap. Measure the length of the filter element and fill the bucket with the soap and water solution to match the filter element length. For example, if the filter is 9" long, then fill the bucket 9" with the solution. This is important because solution with contaminant can enter the filter opening and be deposited on the inside of the filter. Rotate the filter element back and forth to agitate the dirt off the filter. The filter should then be rinsed with clean water. This process may need to be repeated two to three times. Shake the filter to remove as much water as possible. Before reinstalling the filter, make sure the element is dry or only very slightly damp. Excess water on the element may cause damage to the MAF sensor.
Are carburetor adjustments or tuning covered under the crate engine warranty?
No. Carburetor or tuning adjustments are not covered under the current crate engine warranty, and any costs associated with these adjustments are the responsibility of the consumer.
I just installed my new Crate Engine into my Hot Rod and it runs much hotter than the original engine. What's wrong with it?
Hot Rods are named that way for a reason. Let's consider what happens in a high performance engine that makes it perform at a higher level.
For an internal combustion engine to make more power, it must make a bigger "bang" inside the cylinder. We do this by packing more fuel and more air into each power stroke to meet our intended goal. It stands to reason that a natural byproduct of this higher performance would be more heat.
How do we as hot rodders deal with the heat? Well, much of it goes out the exhaust valve and attached exhaust system as spent exhaust gases. Some of it radiates into the under hood air and the metal of the engine and drivetrain. It is spread throughout the engine by the oiling and cooling systems.
The liquid cooling system's job is to shed the remaining heat. It is absorbed by the coolant around the combustion chamber and then pumped to the radiator. There it is routed through small tubes to maximize its contact with the tubing. The tubing has thin fins attached to transfer the heat to passing air.
Something else to consider is that a 50/50 mix of water and coolant can have a boiling point of up to 272 degrees F when using a 15 PSI cap. As long as the coolant stays liquid, no engine damage should occur.
If I install an engine with double the horsepower of my old engine, Will I need a radiator twice as big?
Not necessarily. Many factors influence how well a cooling system will shed the engine heat. Cooling system liquid capacity and radiator size are just part of it. Other things to consider are the path to the radiator, how well the air is directed to the radiator core, how well the radiator is sealed to the core which forces the air through the radiator and not around it, and a path to allow the hot air to escape on the back side.
If the engine compartment fits tightly around the engine, the hot air that has passed through the radiator will become trapped in the engine compartment. Tight fitting hoods with under hood insulation seem to be getting more popular. If the hot air is trapped under the hood, the engine will begin to ingest that hot air through the induction system and add to the engine temperature from the inside. This can lead to higher engine temperatures and damaging detonation due to the higher combustion chamber temperatures.
Other items to consider include; exhaust header size, shape and routing, water pump size and design, thermostat rating and whether or not a bypass hose is used. Certain vehicle options, such as air conditioning, can also affect cooling system efficiency. Air conditioning adds a tremendous amount of heat load. Cars with air conditioning will typically require an electric cooling fan that runs whenever the A/C is turned on.
My new engine overheats at idle but will cool down to normal temperatures while driving down the road. Where should I look?
Engine cooling fans and fan shrouds are most important when the vehicle is not moving. Without the wind blowing in the face of your hot rod, no air flow is moving though your radiator. A properly sized fan and appropriate shroud are necessary to move the needed air across the radiator when the vehicle is sitting still. There are various configurations of fans and shrouds that can be used. Whether an engine driven or electric fan is used, care should be taken to ensure a proper fit between the fan, shroud, and radiator. In some cases certain applications may require multiple electric fans.
No matter what I do, the engine still boils over at times?
Making sure the cooling system is completely full is one of the most common things many hot rodders over look. Low hood lines force the top of the radiator to sometimes fall below the coolant level in the engine. If the fill cap is on the radiator, you will not be able to fill the cooling system properly and unwanted air will be trapped in the top of the engine.
A surge tank that uses a pressurized radiator cap mounted back by the cowl in a position higher than any part of the engine cooling system, can help purge air pockets that may get trapped in the engine. If air pockets exist inside the engine, the normal heat from the engine will cause the liquid near the air pocket to boil into steam. This steam pressure will begin to push the liquid coolant to the easiest exit it can find. Usually this will be the pressure relief on the radiator cap (causing boil over) but could also be a hose or gasket somewhere in the system.