MODIFYING ENGINE FOR BOOST
Turbo charging any engine increases the strain on all of the engine components. At each level of additional boost, new issues for engine configuration develop and need to be addressed.
Keep in mind; it is the combination of matched components that will deliver a reliable high horsepower engine. What works for a low boost application may not take the strain of high levels of boost. Following are some guidelines to consider when setting up an engine for turbo or blower use.
Camshaft
LC Engineering offers specially designed camshafts to achieve full benefit of your turbo engine. We offer custom ground camshafts for all levels of boost and rpm ranges. For most low boost street applications, our Street Turbo Cam (part # 1022027) is an excellent choice. Please call and talk with our technical staff about your specific requirements and for a recommendation.
Valves, Valve Springs and Cylinder Head
For the most performance, valve size, valve springs and cylinder head porting need to match the desired level of boost and camshaft profile used. Our Street Performer cylinder head (part #1021024) will be adequate for most low boost 4WD and 2WD street applications. For drag strip and high rpm use, even at low boost levels, we recommend using our Stage 2 Head (part # 1021033) with Pro Dual Valve Springs and Titanium Retainers. Our Pro Cam Kit (Part # 1020000) should be used if you are rebuilding your cylinder head for most applications.
Compression Ratio
To achieve a reliable turbo charged engine package, you will need to lower your mechanical compression ratio to 8:1. This can be done on stock EFI engine by changing the pistons during a rebuild. We offer both a Street Performer cast pistons and our racing forged piston kit that will achieve this compression ratio. Cylinder head and block modifications can change the compression ratio. Always cc your components during assembly to verify the mechanical compression ratio. Please call our technicians if you have any questions on your specific needs.
Bottom End
The stock bottom engine has adequate strength for low boost and low rpm applications. For higher levels of boost and performance our Pro bottom end components (Pro Crank, Pro Rods, Forged Pistons) should be used. A Pro Bottom End (Short Block Kit part # 1011045) will provide adequate strength to 250 hp. For higher horsepower levels or turbo/nitrous applications please call our technicians for specific recommendations.
Fuel & Ignition Management
LC Engineering offers the SDS fuel management system that will control the fuel curve and Ignition timing. Generally you will need larger injectors additional sensors for higher boost applications. Please call our technicians for a specific recommendation.
Intercoolers:
Intercoolers allow the use of high boost levels and increased performance. There are many different intercoolers designs and locations to position them. We suggest a 3.5” x 8” x 13” core unit. These units are available with different tank configurations. Please call our tech line for specific information on the intercoolers.
LC ENGINEERING TURBO ENGINE RECOMMENDATIONS
These recommendations are a guideline for the type of modifications needed to build a strong and reliable engine for the desired level of boost and performance. Please talk with a technician about your specific requirements before to ordering.
Low Boost Accessories Recommendations 0-10 PSI Boost
-Cylinder Head Studs
-Pro Oil Pump
-Street Turbo Cam
-Street Performer Valve Springs
-Low Compression Street Pistons
-Turbo Gapless Ring Set
-Pro Rod Bolts
-Pro Fuel Injection
-Pro Head Gasket
Medium Boost 10+ PSI Boost
-Cylinder Head Studs
-Pro Oil Pump
-Custom Turbo Camshaft
-Pro Cam Kit w/ Dual Valve Springs
-Pro Head Gasket
-8:1 Forged Piston Kit
-Turbo Gapless Ring Set
-LC Pro Rods
-Timing Chain Conversion Kit
-Pro Fuel Injection
-3 Core Radiator
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