Chevrolet Performance RAMJET 350 Caractéristiques Techniques page 9

GM Part Outside
Number Diameter
14088765 12-3/4"
12554824 14"
14088761 14"
Starter:
The starter must be matched to flywheel (or flexplate) diameter when installing a RAMJET 350 engine assembly. Small
diameter flywheels are 12-3/4" in diameter, and have starter ring gears with 153 teeth. Large diameter flywheels are 14"
in diameter, and have 168 teeth on the starter ring gear. This difference in flywheel diameters requires two different starter
housings. Starter noses used with 14" diameter flywheels have two offset bolt holes; starter used with 12-3/4" diameter
flywheels have bolt holes that are straight across from each other. Note: Chevrolet starter motors use special shouldered
mounting bolts that register the starter on the block.
The following starters can be used with the RAMJET 350 engine assemblies:
14097278 Bolt, starter mounting, long, for heavy duty starter
14097279 Bolt, starter mounting, short, for heavy duty starter
19302919 Permanent magnet gear reduction (PMGR) starter for 14" diameter flywheel/flexplate (10 lb.)
14037733 Bolt, starter mounting, inner for 12-3/4" PMGR starter
12338064 Bolt, starter mounting, outer for 12-3/4" PMGR starter; also for 14" PMGR starter (2 required)
12361146 Hi torque mini starter for 12-3/4" and 14" diameter flywheel
Oil Pan / Filter / Adapter / Dipstick:
The RAMJET 350 engine includes an oil pan, part number 10242245. This pan was originally design for marine and
truck usage and may cause interference problems when installed in certain applications. Check for clearance before
installation. A suggested pan is the ZZ5 oil pan part number 12557558 and will require pan gasket 10108676. Additional
parts required are two (2) main bearing cap bolts P/N 12561388, and "short" windage tray P/N 12554816. This pan also
requires dipstick P/N 12551144 and tube P/N 12551154, as listed below.
The oil dipstick for the RAMJET 350 engine is on the right-hand (passenger) side of the block. Check for clearance when
replacing an early-model block with a left-hand dipstick configuration. The RAMJET 350 engine does not come with an oil
dipstick. When using the oil pan supplied with the engine, the recommended oil dipstick and oil dipstick tube part numbers
are 10190942 and 12552920 respectively. If the ZZ5 oil pan is installed on this engine, the recommended oil dipstick and
tube part numbers are 12551144 and 12551154 respectively. This oil dipstick tube bolts to the engine block below the
deck surface, and can be used with header-type exhaust systems.
Fuel Pump / Fuel Lines / Fuel Filter:
The RAMJET 350 engine does not include a fuel pump. The fuel system in your application must be capable of supplying
a minimum of 35 gallons per hour of fuel. The operating pressure of the fuel pump must be within the range of 43 - 55 psi.
Proper fuel pressure is essential to the correct operation of the RamJet 350. Below are the specifications for expected
fuel pressure under various operating conditions.
Idle =
Steady Cruise =
Wide Open Throttle =
An in-tank fuel delivery system from a Chevrolet vehicle is recommended for use with this system. The fuel system from
any Chevrolet vehicle originally equipped with a port fuel injection system and a V-8 engine is a possible candidate.
Production Chevrolet fuel pumps that would be good candidates include the Vortec truck fuel pump, or an LT1 Camaro/
Firebird fuel pump. Carbureted and Throttle Body Injection fuel delivery systems will not meet the needs of a port fuel
injection system. They do not provide enough pressure at the fuel rail.
Ramjet 350 Engine
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
RAMJET 350 Engine Automatic Transmission Flexplates
Converter Starter Ring
Bolt Pattern Gear Teeth
10.75" 153
11.50" 168
10.75,11.50" 168
38-40 PSI (262-276 KPA)
40-42 PSI (276-290 KPA)
42-44 PSI (290-303 KPA)
IR 13SE18
13SE18
Notes
For one-piece crank seal
Heavy-duty flexplate with increased thickness for
one-piece crank seal
For one-piece crank seal
19417614
PART NO.
DATE
Initial Release - Alin Dragoiu
9
SHEET
REVISION
45
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AUTH
N/A