Author Topic: Official 4A Specs Thread  (Read 5094 times)

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Offline BigMike

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Official 4A Specs Thread
« on: September 29, 2010, 01:32:58 PM »
This list is a work in progress

Variant
1
2
3
Approximate Dates
1983.05-1987.07
1987.08-1989.08
1989.09-1992.05
Compression
9.4:1
9.4:1
10.3:1
HP
112
115
130
T-VIS
Yes
Yes
No
Intake Port Size
Big
Big
Small
Piston Wrist Pin (mm)
18
20
20
Connecting Rod Big End (mm)
40
42
42
Crankshaft Main Bearing (mm)
48
48
48
Other Features
3 rib block
7 rib block,
stronger bottom end
larger con rods
HP gains f/ remapped ECU
External oil drain,
Different ignition system,
Smaller diameter spark plug cords,
Oil squirters for pistons

EngineCam Cover    Power (kW)    Power (HP)    Torque (lb-ft)    YearCar Models
4A - GZENo Colour120165 @6400152 @440091.6 - 95.5AE-101
4A - GZENo Colour120161 @6400152 @440090.10 - 91.6      AE-92
4A - GZENo Colour108145 @6400137 @440087.5 - 90.9AE-92
4A - GZENo Colour108145 @6400140 @400086.8 - 89.10AW-11
4A - GE 20V      Black123165 @7800120 @560096.6 -AE-111
4A - GE 20V      Silver120161 @7800120 @560091.6 - 95.5AE-101
4A - GERed10013489.8 - 92.8AT-170
4A - GERed100134 @68001105 @600089.5 - 92.4AE-92
4A - GERed & Black8811888.5 - 89.7AT-170
4A - GERed & Black88118 @6600100 @480087.5 - 89.4AE-92
4A - GEBlue & Black8811885.8 - 88.4AT-160
4A - GEBlue & Black8811885.8 - 87.8AT-160
4A - GEBlue & Black8811885.8 - 87.7AT-160
4A - GE?85.6 - 89.10AW-11
4A - GEBlue & Black88118 @660098 @480084.6 - 85.5AW-11
4A - GEBlue & Black8811884.10 - 87.4AE-82
4A - GEBlue & Black8811883.5 - 87.4AE-86


Valves161616162020
Cam Box Colours / Lettering ColourBlue & Black on Silver backgroundBlue & Black on Silver backgroundRed & Black (previous motor still in USA)Red on Silver backgroundChrome on Silver backgroundBlack background
Car ModelAE82/AE86AW-11AE-92/AW-11AE-92AE-101AE-111
Year83/5-87/584/6-87/587/5-89/589/5-91/691/6-95/595/5-
TVISYesYesYesNoNoNo
Intake port sizeLargeLargeLargeSmall4 Throttle4 Throttle
Gudgeons18 mm18 mm20 mm20 mm20 mm20 mm
Conrod Big Ends40 mm40 mm42 mm42 mm42 mm42 mm
Main Bearings48 mm48 mm48 mm48 mm48 mm48 mm
Injection TypeMAP (Japan/UK)AFM (US/Europe) MAPMAP (Japan/UK?)MAP (Japan/UK?)AFMMAP
EFID-JetronicL-JetronicL-JetronicD-JetronicDD
No of block ribs337777
Oil Cooled PistonsNoNoYesYesYesYes
Power (kW)88 @ 660088 @ 660088 @ 6600100 @ 7200120 @ 7400123 @ 7800
Power (HP)118 @ 6600118 @ 6600120 @ 6600140 @ 7200160 @ 7400165 @ 7800
Torque (kg-m)14.5 @ 520014.5 @ 520014.5 @ 520015.0 @ 600016.5 @ 540016.5 @ 5600
Bore x Stroke81.0 x 77.081.0 x 77.081.0 x 77.081.0 x 77.081.0 x 77.081.0 x 77.0
Compression9.49.49.410.310.511
OctaneLowLowLow (USA)HighHighHigh



Sources:
http://www.ae92gts.com/ae92gts_engine_type.html
http://webspace.webring.com/people/xu/um_10670/4ageengines.html
http://www.kalalahti.com/dataBySubject/GasolineEngines.html
« Last Edit: September 29, 2010, 01:53:23 PM by BigMike »
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Offline BigMike

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Re: Official 4A Specs Thread
« Reply #1 on: September 29, 2010, 01:49:00 PM »
Fuel Injector Flow Rates

4A-GE TVIS big port      182cc/min
4A-GE Small port235cc/min
4A-GZE365cc/min
20v295cc/min


Source:
http://www.billzilla.org/4agstock3.htm
« Last Edit: September 29, 2010, 02:09:45 PM by BigMike »
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     My 1987 Supercharged 4A-powered 6-speed MR2

Offline BigMike

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Re: Official 4A Specs Thread
« Reply #2 on: September 29, 2010, 02:03:08 PM »
Cam info


16v 4AGE heads specifications -
- Valve included angle (angle between the inlet and exhaust valves) - 45
- Minimum valve spring seat pressure to allow for 7,700rpm - 35lbs, or 16kgs
- Inlet valve diameter - 29.5mm
- Exhaust valve diameter - 25.5mm
- Both valves have 6mm diameter stems.
- Cam bucket diameter 28mm, shim diameter 25mm

Cam Timings - (Japanese spec)Inlet CamIVO  BTDCIVC  ABDCDurationLift (mm)
'Big port'9512407.56
'Small port'8442327.1
4AGZE8442327.1
Exhaust CamEVO BBDCEVC ATDC
'Big port'519 2407.56
'Small port'4482327.1
4AGZE4482327.1



20v 4AGE head specifications -
- Valve included angle (angle between the inlet and exhaust valves) - 35 (I think ...)
- Inlet valve diameter - 26.5mm
- Exhaust valve diameter - 26mm
- Both valves have 5mm diameter stems
- Cam bucket diameter 23mm, with very small shims between the valve stem top & bucket 

Cam Timings - (AE101)Inlet Cam IVO  BTDC IVC  ABDC DurationLift (mm)
VVT <4400rpm & > ~7000rpm0702507.97
VVT >4400rpm3040
Exhaust CamEVO BBDCEVC  ATDC250
54167.6

Cam Timings - (AE111) Inlet CamIVO  BTDCIVC  ABDCDurationLift (mm)
VVT <4400rpm & > ~7000rpm 565 2508.2
VVT >4400rpm 3535
Exhaust CamEVO BBDCEVC  ATDC
5416 2507.6


Source:
http://www.billzilla.org/4agstock.htm
« Last Edit: September 29, 2010, 02:09:59 PM by BigMike »
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R135
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  246

     My 1987 Supercharged 4A-powered 6-speed MR2

Offline BigMike

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Re: Official 4A Specs Thread
« Reply #3 on: September 29, 2010, 02:07:55 PM »
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     My 1987 Supercharged 4A-powered 6-speed MR2

Offline Sirdeuce

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Re: Official 4A Specs Thread
« Reply #4 on: September 29, 2010, 04:00:38 PM »
The flow rate of the USDM large port TViS AFM 4age is 210cc min. Billzilla's info covers the MAP type version. The 182cc injectors are tied into a single group fire, all are fired at the same time. Our engines use a batch fire setup, 2 injectors are fired at a time. The MAP type have a fuel pressure of 2.9 bar as where the AFM version are a little lower, 2.55 bar. That's close to a 14% difference in pressure. The firing of all injectors at one time requires a lower fuel rate, and less attention tio injetor pulse timing. Not sure if they have a constant pulse or a single pulse for the entire cycle though. The batch fire system fires 2 injectors at a time. Our little 4AGE's fire cyls.1 and 2 in one batch and 3 and 4 in the other. This is actually better for both power and emissions as the fuel has less time to condense on itself and the intake walls and valve backs. I think they use the higher pressure on the MAP system to compensate for condensation. Higher pressure = finer mist. Just my thoughts on that.A little info for tuning, if you decrease the fuel pressure from 2.9 to 2.55 on the 182cc injectors you get about 162cc flowrate, increase the 2.55 to 2.9 on the 210cc injectors you get about 235cc flowrate. For this reason the only advantages to using the green coded MAP injectors out oof the 130 horse small port, high comp engine is that you can remove the injector resistor as they are high impoedence injectors, and they are ball type with 2 spray holes that can be directed to the tops of the valves.
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