AW11 TRD Engine/Suspension Prep Guide
I believe this is from the old TRD catalog aroud 1990 maybe ?? It gives a brief history of the MR2 and the 4AGE as well as the 4AGZE.
[b]Phase One: STREET PERFORMANCE: Results: Slight decrease in ride quality, improved handling, improved braking and 10-15 hp increase.
TRD Springs
TRD Adjustable Swaybars
TRD Low pressure gas strut inserts
TRD Brake pads
TRD Brake line kit (drain and install ford type fluid)
TRD Header and Exhaust System High Flow Air filter Recalibrate fuel injection system (See Engine Preparation Section)
Reset alignment:
Camber Front: -1 degree
Camber Rear : -1 "
Caster : +6 "
Toe in Front: 1/16 in.
Toe in rear : 1/8 in.
Phase Two: AUTO CROSS, STREET PERFORMANCE AND ROAD RACE (Dependent upon class restrictions)
RESULTS: Decrease in ride quality (lowers ride height 1.5-2 in.), dramatically improved handling, improved braking.
Instead of phase one equipment:
TRD High pressure gas stuts
TRD Springs
Reset Alignment:
Camber Front: -2 degrees
Camber Rear : -1 1/2 degrees
Caster : +6 degrees
Toe in front: 1/16 in. ( 1/8 in. out for auto cross)
Toe in rear : 1/8 in. ( 1/16 in. out for auto cross)
All phase one Modifications, Plus:
TRD Urethane Bushings
Front and Rear strut tower braces
Negative camber blocks
Front and Rear adjustable camber kits
Engine Modifications ( see Engine Modifications section)
Light weight fly wheel
Heavy Duty Clutch
LSD
Performance Ratio Ring and pinion Set
Close ratio transmission gear set
Section 3.3 (Summary)
Engine Components: 4AG
“The bottom end of the 4AG has proven extremely reliable in all types of performance applications, and the stock connecting rods and crankshaft will withstand up to 170 hp and 8000 rpm. For applications where higher hp or rpm are desired, Carillo rods, our TRD billet crankshaft and dry sump lubrication is required.”
“The original fuel injection system is capable of delivering suffucient fuel to support 140hp with only minor adjustments (see engine preperation section). Engines that develop over 170 hp will require larger injector nozzles.”
4AG Engine Recommendations
Phase One: Street Performance
Results: Although there are no internal engine modifications, this phase is no emmisions legal. Modifications cause no reduction in low speed drivability and there is a 15-20% hp increase over a usable power range from 3000-6500 rpm.
TRD Exhaust header and high flow exhaust Recalibration of fuel injection system (see engine preperation section)
TRD Spark plug wire Set
TRD Adjustable camshaft gears
Phase Two: Street Performance, Rally, Road Race
Results: With no internal modifications or decrease in drivability, there is a increase of 25-30% hp increase over a usable power range of 3000-8000 rpm.
TRD Exhaust header and high flow exhaust Recalibration of fuel injection system (see engine preperation section)
TRD Spark plug wire Set
TRD Adjustable camshaft gears
TRD Camshafts (272 duration intake 272 duration exhaust 7.5mm lift)
Phases 3-5 require internal modifications
4AGZ vs. 4AGE internal differences:
Strengthened block
Dished forged pistons
Connecting rod journal diameter increased from 40mm - 42mm
Piston pin diameter increased from 18mm - 20mm
TRD 4A-GE Specs
Courtesy of Stephen Gunter toyracer@kasnet.com
So, you have always wanted to build your 4A-GE to Formula Atlantic specs, you just couldn’t find them.
Well, here they are, courtesy of TRD. I recieved these specs from TRD back in 1988. Thanks a lot, TRD.
General:
Cylinder Firing Order: 1-3-4-2
Engine Bore: 81mm (3.189")
Engine Stroke: 77mm (3.031")
Oil Viscosity: 40 or 50 weight, depending on air temperature
Fuel Octane Rating: 108 prefered
Operating Oil Temperature: 200º-230º F, above 230º there is power loss
Operating Water Temperaure: 180º-200º F
Oil Pump Operating Pressure: 80-90 lbs
Spark Plug: Champion C55C or C57C
Compression Ratio: 12.7:1 maximum
Intake Camshaft Timing: 102º Lobe Center
Exhaust Camshaft Timing: 102º Lobe Center
Intake Valve Lash (cold): .012"
Exhaust valve Lash (cold): .013"
Ignition Timing: 28º BTDC @ 2,000rpm
Clearances’
Valve Lifter to Bore: .0005" - .0028"
Camshaft Journal: .0014" - .0028"
Piston Ring Gap (#1): .016" - .018"
(#2): .015" - .017"
Piston to Cylinder Wall: .0045" - 0050"
Wrist Pin Diameter: 19mm (.7480")
Wrist Pin: .0006" - .0015"
Main Bearing: .0020" - .0028"
Thrust Bearing: .003: - .006"
Con Rod Large End Diameter: 1.7726" - 1.7716"
Con Rod Bearing: .0025" - .0030"
Con Rod Side: .008" - .012"
Crankshaft Nose Diameter: .9842" - .9834"
Crankshaft Main Journal Diameter: 1.8897" - 1.8892"
Crankshaft Con Rod Journal Diameter: 1.6525" - 1.6520"
Pilot Bushing ID: .678" - .676"
Input Shaft Diameter: .669" - .668"
Cylinder Head Flatness: Within .001"
Valve Spring Height (installed): 1.425" - 1.398"
Valve spring Pressure (installed): 50 psi @ installed height
Final Combustion Chamber Volume: 33.9 cc minimum per cylinder, including Cylinder Head Gasket.
Bolt Torque Specs
Crankshaft Front Pulley: 60ft/lbs
Camshaft Pulley: 35 ft/lbs
Idler Pulley: 27 ft/lbs
Crankshaft Main Bearing: 47 ft/lbs
Cylinder Head: 43 ft/lbs
Flywheel: 85 ft/lbs
Connecting Rod: 45 ft/lbs [/b]
