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Flywheel I Flexplate:
Like all small block V8 engines produced since 1986, the CT355 circle track engine has a 3.00" diameter flywheel
flange bolt pattern. Small block V8 engines produced from 1958 through 1985 had a 3.58" diameter flywheel flange bolt
pattern. This change in bolt circle diameter was made to accommodate a leak-resistant one-piece rear main seal. Due
to revisions in the crankshaft design, a CT355 circle track engine must have a counterweighted flywheel (or flexplate)
for proper balance. The CT355 circle track engine includes a flexplate, Chevrolet part number 14088765. Additional
flywheels and flexplates are available from the chart below.
CT355 Circle Track Engine - Manual Transmission Flywheels
Outside
Part Number
Diameter
14088648
14088646
12 3/4"
14088650
12 3/4"
CT355 Circle Track Engine - Automatic Transmission Flexplates
Outside
Part Number
Diameter
14088765
12 3/4"
12554824
14088761
Pilot Bearing:
You must install a pilot bearing in the rear of the crankshaft if the engine will be used with a manual transmission. The
pilot bearing aligns the transmission-input shaft with the crankshaft centerline. A worn or misaligned pilot bearing can
cause shifting problems and rapid clutch wear. A roller pilot bearing, Chevrolet part number 14061685, is recommended
for this engine. This heavy-duty bearing adds an extra margin of reliability to a high performance drivetrain.
Starter:
The recommended starter for the CT355 circle track engine is Chevrolet part number 10465143. This is a lightweight
gear reduction starter that was originally used on the 1988-1991 Corvette. This starter is for use with 12 3/4" flywheels.
Use Chevrolet bolt part numbers 12338064 (long) and 14037733 (short) when installing this starter on this engine.
TITLE
CT355 Circle Track Racing Engine (88958603) Specifications
Clutch
Diameter
14"
11.0,11.85"
10.4"
10.4"
Converter Bolt
Diameter
10.75"
14"
11.50"
14"
10.75,11.50"
Starter Ring
Gear Teeth
Notes
168
For one-piece crank seal
Lightweight nodular iron flywheel, weighs
153
approximately 16 lbs.; for one-piece crank seal
153
Standard weight flywheel; for one-piece crank seal
Starter Ring
Gear Teeth
Notes
153
For one-piece crank seal
Heavy-duty flexplate with increased thickness for
168
one-piece crank seal
168
For one-piece crank seal
88960548
IR 24MR14
PART NO.
5
32
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