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    Haibeck Automotive Technology

 

 

Major Engine Power Upgrades

Component Packages for a 350 Cubic Inch Engine

 

Upgrade:                                                                         '90-'92 HP                     '93-'95 HP

Original equipment engine power                                            375                               405

Low back pressure exhaust system                                         +10                                +5

Performance engine calibration (chip)                                      +10                               +10

                                                           Subtotal                   395                               420

         Long Tube Headers                                                             +25                               +25

                                                           Subtotal                   420                               445

              Top End Porting                                                              +30                              +20

                                                           Subtotal                   450                               465

          Cylinder Head Porting                                                         +45                               +30

                                                           Subtotal                   495                                495

            Aluminum Flywheel                                                              +15                               +15

                                                           Total HP                     510                                     510

Click on a link below for additional details about the upgrade component

Long Tube Headers            Top End Porting            Cylinder Head Porting           Aluminum Flywheel  

                                                             Complete Engine Packages

The 510 HP 350

            - Full porting, sized for a 350 cubic inch engine.

            - Long tube headers

            - Fidanza aluminum flywheel

            - Stock camshafts, smooth idle.

            - If driven well, this engine will run 12.1@120 mph in the quarter mile.

            - The most performance for your LT5 upgrade dollar                                 $9,995.

Click for Details

368 Cubic Inches, 540 HP

            - Four inch liners with Diamond pistons

            - Full porting, sized for a 368 cubic inch engine.

            - Long tube headers

            - Fidanza aluminum flywheel

            - Stock camshafts, smooth idle.                                                           $17,900.

        Click for Details

368 Cubic Inches, 560 HP

            - Four inch liners with Diamond pistons

            - Full porting, sized for a cammed 368 cubic inch engine.

            - Long tube headers

            - Fidanza aluminum flywheel

            - Extended duration camshafts, rough idle.                                           $20,950.

        Click for Details

385 Cubic Inches, 565 HP

The 385's place in LT5 history.

One of my favorite engines, the original 385's were built by John Lingenfelter and Doug Rippie. They used a long stroke version of the crankshaft made by the OE LT5 crankshaft supplier Shardlow in England. Shardlow ceased to exist after a reorganization in about 1997. After that, crankshafts were acquired from US suppliers. The LT5 crankshaft is complicated to build and thus is very expensive. This accounts for the large price difference going from a 368 to 385 ci. Since a 415 crankshaft costs the same as a 385 crankshaft, it makes sense to build a 415 if incurring the expense of a custom crankshaft. We can build a 385 today. However, as a practical matter I recommend a 378 ci engine if an LT5 with a conservative stroke is desired. See the description of the 378 below.

            - Four inch liners with Diamond pistons and Eagle ESP rods

            - Full porting, sized for a 385 cubic inch engine.

            - Conservative 3.820 stroke crankshaft maximizes durability

            - Long tube headers

            - Fidanza aluminum flywheel

            - Stock camshafts, smooth idle.                                                          $23,900.

        Click for Details

378 Cubic Inches, 550 HP

            - Four inch liners with Diamond pistons and Eagle ESP rods

            - Full porting, sized for a 378 cubic inch engine.

            - Conservative 3.760 stroke crankshaft maximizes durability

            - Long tube headers

            - Fidanza aluminum flywheel

            - Stock camshafts, smooth idle.                                                          $18,900.

        Click for Details

415 Cubic Inches, 600 HP

            - Four inch liners with Diamond pistons and Molnar rods

            - Forged 4.125 stroke Bryant crankshaft. 4340 steel material.

            - Maximum porting

            - Large intake valves

            - Long tube headers

            - Fidanza aluminum flywheel

            - Stock camshafts, smooth idle.                                                          $24,900.

        Click for Details

415 Cubic Inches, 650 HP

            - Four inch liners with Diamond pistons and Molnar rods

            - 4.125 stroke Bryant crankshaft. 4340 steel material.

            - Maximum porting. The plenum port septum is removed.

            - Large intake valves

            - Long tube headers

            - Fidanza aluminum flywheel

            - Extended duration camshafts, choppy idle.

            - If driven well, this engine will run 10.9@130 mph in the quarter mile. For use at the drag strip a high torque capacity clutch is required. It is not included in the engine package.

                                                                                                                  $30,475.

        Click for Details

740 HP LS9

            - 19% supercharger overdrive

            - Porting for the supercharger inlet and the throttle body

            - Haibeck Automotive Technology tuning

            - CCW forged wheels and ET Street 345/35-18 tires. These are nine pounds lighter than the OE

                wheels and tires.

            - Special rear wheel alignment for drag racing

                                                                                                                  $7,390.

730 HP LS9

              - Delete the wheels, tires and alignment above.

                                                                                                                  $4,710.

 

 

All Crankshaft HP Specifications Are Calculated From Measured Dynojet Rear Wheel Power.

The calculation assumes a 15% power loss through the drive line.

WHP/.85 = CHP

For example: 550 WHP/.85 = 647 CHP