525hp Package – this package features a 2000-2006 EFI 364ci 6.0L GM truck engine using a cast iron block and stock GM aluminum vortec heads, stock rotating assembly or approved aftermarket connecting rod and piston (part numbers displayed in description). The camshaft is changed 302/309 duration .585 int., .601 ext. lift, ARP rod bolts are installed and bee hive valve springs are changed. It is rated at 500 ft lbs of torque, 525hp on pump gasoline, 6975rpm rev limit and 246 degree water shut down, 19psi low oil pressure shut down. Also available with external scavange system (dry sump adds no additional hp).

This package is recommended for late models, modifides and limited sprint car classes that were using a Holley 4150 check legal 750CFM 4bbl carburetor rules and 23 degree cast iron or aluminum spec heads up to 650 lift camshafts.

Tech Procedures:

1.   Computer Rotation:

It is recommended that each track and/or series should purchase from Schwanke Engines one computer to be used for random rotation among competitors. The atmosphere of a competitor knowing he or she may not always take the same computer home they came with is the most important tech procedure. This will help eliminate any need for internal engine inspection.

2.   Seal Inspection;

There are four seals on the engine:

One on each center of the valve cover

One on the timing cover right side below water pump

One on the right front corner of the intake manifold

The seal numbers are sequential. Five seals are produced for each engine one is held back for teching and/or field service available by paper trail, tech and the race director signatures. You then need to call Schwanke Engines for the seal. (Example number 600001 = 60 represents 6000 truck engine and 0001 is serial number).

3.   Scanner Test:

The system also features a 16 pin OBD II ALDL connector a Tech II or Snap on Tools scanner can be used to access data stream. Call Schwanke Engines for VIN information.

Casting & Part Numbers:

Mass air flow sensor GM 25168491

Injector 25323974, 25317669 or 25317628

75mm (2.950-2.965) Stock throttle body GM cable drive only

may be a CNC throttle body

Head casting 799, 317, 243 or035

Block casting 12576181 or 12551364 (cast iron)

Crankshaft casting 12552216

After market forged connecting rod

        CRS612503D (Eagle),

         SP93273B8 (Crower)

        CRC6125 (Callies Comp Star)

After market piston LS1314000F01 or LS1314030F04

Other Tech Aids:

Cranking compression 170-175lbs

Base idle 1200rpm