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GM 88869604 CT400 IMCA-Sealed 604 Chevy Crate Engine, Dyno Tested

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#91619318604

GM 88869604 CT400 IMCA-Sealed 604 Chevy Crate Engine, Dyno Tested

IMCA sealed and approved for use in IMCA
Dyno-verified horsepower and torque and will include a dyno sheet of your engine
400 HP @ 5500 RPM 400 ft. lbs. of torque @ 4500 RPM

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Product Summary

604, Deluxe Crate Engine Crate Engine Type

IMCA sealed and approved for use in IMCA
Dyno-verified horsepower and torque and will include a dyno sheet of your engine
400 HP @ 5500 RPM 400 ft. lbs. of torque @ 4500 RPM
Piston rings are broken-in using a proprietary dyno program to ensure proper ring seal which increases horsepower
Lifter preload and timing are set prior to break in procedure for race ready performance right out of the crate

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Key Specs

Crate Engine Type	Deluxe Crate Engine
Compression Ratio	9.72:1
Engine Displacement	350 cu. in.
Camshaft Type	Hydraulic Roller Tappet
Cylinder Head Material	Aluminum

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Speedway Motors Racing Engines 88869604 Details

Run up front with the 400-horsepower CT400 crate engine (often referred to as the "604 crate") featuring Fast Burn heads from GM Performance Parts. Now, Speedway Motors Racing Engines is offering this 604 crate engine as a dyno-verified package that is ready to race!

These IMCA-sealed 604 crate racing engines are based on the popular Fast Burn 385 street crate engine, but include a racing-only 8-quart circle track oil pan with dual kick-out design, along with a valve cover breather kit and special "kool nut" rocker arm design. The assembly also includes an open-plenum high-rise intake manifold and 1.5:1-ratio aluminum roller rockers.

The 604 crate engine includes a bulletproof bottom end, anchored by a forged steel crankshaft and hypereutectic pistons. The 23-degree, Fast Burn aluminum heads enable tremendous power in the small-block V-8 because of a unique chamber design that quickly and completely burns all of the air/fuel mixture – giving you maximum power. With the CT400 racing engine under the hood of your Modified or Late Model, you'll put a "fast burn" on the competition.

Dyno-verified horsepower and torque
Piston rings are broken-in using a proprietary dyno program
Lash and timing are individually tuned
Engine is ready to race, right out of the crate
IMCA-sealed for equal competition
Popular in Modified and Late Model classes*
400 HP 5500 RPM
400 ft. lbs. of torque 4500 RPM
4.00" x 3.48" bore x stroke
9.6:1 compression ratio
92 octane recommended fuel
4-bolt main caps
Cam lift: .474" intake / .510" exhaust
Cam duration .050": 208° intake / 221° exhaust
112° lobe separation
1.5:1 ratio aluminum roller rocker arms
2.00" Intake / 1.55" Exhaust valves

Includes:

Fully assembled long block
Black steel valve covers w/ breathers
Oil pump, pick-up, 8 quart oil pan
Eliminator Vortec intake manifold
Spark plugs
8" harmonic balancer
Front timing cover
Dyno sheet of your engine
IMCA-issued bolts and is approved for use in IMCA

*Check track/series rules for approved applications.

Charts

GM CT400 Spec Sheet (PDF)

Guides & Documents

Crate Engines Technical Information (91619318604)

Increasing Your Lead in Crate Motor Classes (Legally!)

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA Prop 65

CARB warning

Speedway Motors Racing Engines 88869604 Specifications

KEY SPECS
MFG. Part #	88869604
Brand	Speedway Motors Racing Engines
Crate Engine Type	Deluxe Crate Engine
Compression Ratio	9.72:1
Engine Displacement	350 cu. in.
Camshaft Type	Hydraulic Roller Tappet
Cylinder Head Material	Aluminum
Piston Material	Hypereutectic Aluminum
Crankshaft Material	Forged 4340 Steel
Carburetor Included	No
Intake Manifold Included	Yes
Distributor Included	No
Connecting Rod Material	Powdered Metal
Valve Covers Included	Yes
Cylinder Heads Included	Yes
Rear Main Seal Style	1-piece
Timing Cover Included	Yes
Oil Pan Included	Yes
Water Pump Included	No
Harmonic Balancer Included	Yes
Flywheel Included	No
Spark Plugs Included	Yes
Spark Plug Wires Included	No

GENERAL
Torque	400 ft./lbs.
Horsepower	400 horsepower
Maximum RPM	5800
Camshaft Duration (.050 in)	208° intake / 221° exhaust
Camshaft Lift (in)	.474 intake / .510 exhaust
Warranty	None
Assembled	Yes
Block	Cast Iron, 4 bolt main
Notes	Broke-in, dyno-verified HP/TQ, and IMCA-sealed for competition.
Sold in Quantity	Each

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Questions & Answers

3 Questions • 3 Answers

Sort Questions

with the dyne engine, do you make ignition timing initial and advanced recommendations? What about jetting on a 3310 carb?

by heath

• 10 years ago

1 answer

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What is the difference between the GM sealed and IMCA sealed motor?

by Mike

• 10 years ago

1 answer

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What flex plate do I need to use with the 604 crate engine? (What part number for a 153 tooth flex plate)

by Nater

• 11 years ago

1 answer

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3 of 3 questions shown