In addition, a brace between the head and throttle body was added to reduce vibration. A test mode function was added; in the 7A-FE engine, a knocking correction function using a knock sensor was also added. Just wanted to know which of these accelerates the best??
The 7A-FE boasted an extra 10 horsepower and 15 lb-ft of torque, engaging at a lower rpm (110 hp in California); in metric terms, it pushed out 82 kW and 156 Nm.
There was originally a cold-start injector in the 4A-FE, but this was eliminated in 1993. In addition to a knock sensor, the 7A-FE had a torque management feature which cut torque while the automatic transmission shifted to minimize harshness. When the 7A-FE was designed, it was given the same improvements as the 4A-FE, as well as a knock sensor. 7afe Vs 4afe That 7AFE you mention, I remember reading on this site that it has a 20v head swapped onto it, in effect being actually what the call a 7AGE its not a Toyota engine but by mating the 4AGE head and 7AFE bottom they came up with this name. The intake diameter was increased from 30.0 to 31.0 mm, the exhaust kept the same size at 24.5 mm, and the lift increased from 6.6 to 7.6 (both intake and exhaust). The 7A engine series was essentially the same engine, stroked for higher displacement (1.8 liters) and better torque. Cars ⢠I think i have a 2nd gen 4AFE by accident. I am in need of a 7afe engine I found what I thought was a 7afe in a 96 corolla it looks exactly like the 7afe I took out of my celica. * A 7afe is not just a stroked 4afe, the engines are completly different internally, Pistons are different, Cam profiles are different, Valves are different sizes, 7afe uses a 2 piece oil pan, also the cooling system is different and more efficent on the 7afe then the 4afe's, 7afes cooling system promotes cooler intake temps for better knock resistance and increased volumetric efficency. By using this cooling sequence, the intake air temperature is reduced and knocking resistance and volumetric efficiency are improved. 4afe vs 5afe v 7afe. The damping coefficient in the low frequency range was made larger, thus improving drivability and riding comfort. Those corolla's also came with the 4AFE in them. This causes the rubber in the mount's shear direction to be the soft direction, thus reducing engine noise and booming noise. * A 7afe is not just a stroked 4afe, the engines are completly different internally, Pistons are different, Cam profiles are different, Valves are different sizes, 7afe uses a 2 piece oil pan, also the cooling system is different and more efficent on the 7afe then the 4afe's, 7afes cooling system promotes cooler intake temps for better knock resistance and increased volumetric efficency. A forum community dedicated to Toyota Celicas owners and enthusiasts. For a better experience, please enable JavaScript in your browser before proceeding. I can get it a lot cheaper than I can get a 7afe. You can probably get away with swapping a lot of those parts but you will need a new ECU and probably need to rewire some stuff. You can post now and register later. Toyota Owners Club AU © 2020 | This Website has no association with Toyota (AU) or Toyota Motor Corporation. At the same time, one of the five original engine mounts in the Corolla was dropped, leaving four; but the right-side engine mount were revised, to a cylindrical, shaft-type liquid-filled compound type to reduce vibration and noise. The cooling system reached the bottom of the intake port first to reduce intake air temperature, improving knock resistance and efficiency. As for the 7AFE, I have one in my '89 corolla SR5 coupe.. it's a nice engine. After the engine coolant cools the intake ports of the cylinder head, it then cools the cylinder block and cylinder head. 7AFEs are gauge-redlined at 6200 rpm. The torque curve was fairly flat, with a steep, linear horsepower curve. 7a-fe produces torque much lower than the 4afe . Pasted as rich text. 4a has peak torque at 4800rpm and peak power at 5800. if you get a jap 4afe ecu it will increase revs to 6000 and add an extra 10nm and 10hp.
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Timing was changed so that the intake closed at 38° ABDC instead of 34°, exhaust opened at 42° instead of 37°, and exhaust closed at 2° ATDC instead of 3°. Site Contents. * 7afes fuel cut off is 6800, mate i used to be there everyday. | Cookies | Privacy Policy | Terms & Conditions, Toyota Owners Club (AU) The shape of the exhaust manifold was changed to match the newly-adopted WU-TWC manifold converter. Switching to a rotary solenoid-type idle control valve meant that the idle-speed adjusting screw could be eliminated.
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