The 4A-GE engines with the 1985 design 12 months are known as "blue major" versus the afterwards "pink leading" engines, since the paint colour about the valve handles differs, to show different engine revision, utilizing distinct port sizes, various airflow metering, and various small variations to the engine.
As such they ARE NOT interchangeable in between one another Unless of course the matching VVT pulley is also equipped, for example there won't be any issues with fitting equally the cam and VVT pulley supposed for the Blacktop engine alongside one another on to your Silvertop. Remember to begin to see the short article “Dealing with VVT” To learn more.
In Japan these engines ended up Utilized in Formulation Toyota, a collection very like Formulation Atlantic where there is just one SPEC engine accessible to all competition. The magic of 20-valve is obvious on the chance to achieve and maintain a high RPM threshold.
They aren’t readily interchangeable as the two mounting bolts are additional apart within the Blacktop trumpets. Please see “Throttle bodies” for more information.
The Silvertop engine highlighted a small recesses / shallow bevels main into all sides with the cam bucket recesses. This really is to aid Using the oiling in the bucket and gives added clearance for taller cam lobes. During the Blacktop’s these were substantial elevated.
In spite of this, most higher-functionality racing engines however utilize vast valve angles which permit for straighter ports and even more efficient air flow.
Fantastic Site with a few information and facts basic to 4age's. Not lots of unique stuff for our motors, but our engines are identical adequate.
The 4AGE engine is usually a desire for tuners. Its strong style and design and substantial-revving nature enable for important modifications with no compromising dependability. Mechanics usually suggest the next updates:
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This not simply raises the airspeed which triggers improved cylinder filling, but mainly because of the asymmetrical airflow a swirl is made while in the combustion chamber, indicating greater fuel atomization. This enabled the torque curve to continue to be intact at reduce engine speeds, letting for better overall performance over the complete speed band plus a wide, flat torque curve throughout the crossover point.[27] In the course of rising engine velocity, a slight lurch can manifest in the crossover place and a qualified driver will be able to detect the change in overall performance. Creation of the main-generation engine product lasted until Could 1987.
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It could be denoted by a grey go over on the best-mounted intercooler with the emblem examining "Twin Cam sixteen Supercharger". While this cover was also utilised on early AE92s with the first-era 4A-GZE, The dearth of AFM and its subsequent substitute with MAP inside the later on AE92s will make this generation simply read more recognizable.
Aftermarket Assistance: A lot of companies generate overall performance parts specifically for the 4AGE, like ingestion programs, exhausts, and ECU tuning choices, as famous in discussion boards and enthusiast Web-sites like Club4AG