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Water Pump:
Included on the CT355 circle track crate engine is a long style cast iron water pump, Chevrolet part number 88894341. To
ensure the durability of this circle track crate engine, the engine operating temperature should be kept between 180° and
200° F.
Rocker Covers:
The CT355 circle track engine comes equipped with center hold-down bolt rocker covers designed for circle track racing.
The left hand rocker cover, Chevrolet part number 25534358 is manufactured with two 1 3/8" tall tubes. Mounted on top of
these tubes are breathers, Chevrolet part number 25534355, for the engine's PCV system. The cover on the right hand side,
Chevrolet part number 25534357, is stamped without any holes. Included on the right hand valve cover is an engine tune-up
decal, Chevrolet part number 88960587.
Rocker Arm Nuts / Valve Lash:
Unique rocker nuts are installed on the CT355 circle track crate engine. These new rocker arm nuts, Chevrolet part number
88961233, are designed to increase the amount of oil retained on the stamped steel rocker arms. The increase in oil retention
increases the durability and longevity of the rocker arms in circle track racing applications. The nuts include a positive locking
screw to prevent the rocker arm nut from loosening during use. The recommended valve lash for this engine is zero lash plus
'A to % turn. After the lash has been set, rotate the rocker arm nut 1/3 to 1/2 turn counterclockwise and then snug the set
screw. Next, retighten the nut and snugged set screw assembly by rotating it clockwise 1/3 to % turn to the original lash point.
Bolt Sealing Kit:
A key part of the Chevrolet Performance circle track crate engine program is the sealing of the engines at the assembly plant.
When the engines are assembled, eight (8) tamper-proof bolts are installed on to ensure the engines have not been modified
after initial assembly. Two bolts are used on the oil pan, two on the front cover, two on the intake manifold, and one on each
cylinder head. These bolts cannot be purchased through your local Chevrolet dealer. You must contact your local track in the
event that you decide to rebuild your engine in the future.
Ignition System:
The HEI distributor, Chevrolet part number 93440806, included with the CT355 circle track engine is a self-contained ignition
system that includes a magnetic pickup, a module, a coil, a rotor, and a cap. The HEl's large diameter cap minimizes arcing
and cross-firing between adjacent spark plug terminals. The cap's male terminals provide a reliable, positive connection for the
spark plug leads. The HEI distributor supplied with the CT355 circle track engine has a hardened (melonized) drive gear that is
compatible with a steel camshaft. Use of a non-hardened distributor gear will result in excessive wear.
The HEI system requires a 12 volt power supply for proper operation. The HEI ignition system should be connected directly to
the battery with 10 or 12 gauge wire through a high quality ignition switch. lf you are installing an HEI ignition in an early model
vehicle originally equipped with a point-type ignition, be sure to remove or bypass the resistor in the wiring harness to ensure
the HEI receives 12 volts continuously. Use distributor connector package Chevrolet part number 12167658, which includes
connectors and wires for the HEl's tachometer and 12 volt terminals.
Set spark timing at 34° before top dead center (BTDC) at 4000 rpm with the vacuum advance line to the distributor
disconnected and plugged. This setting will produce 34° of total advance at wide-open throttle (WOT). The HEI vacuum
advance canister should remain disconnected for race applications. This engine is designed to operate using only the internal
centrifugal advance to achieve the correct timing curve.
Oil Pan:
Included with the CT355 circle track engine is oil pan, Chevrolet part number 25534354. This oil pan has eight (8) quart
capacity, and was designed for circle track racing, incorporating baffles and kick outs on each side of the pan. The pan is 7
inches deep.
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CT355 Circle Track Racing Engine (88958603) Specifications
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