20V Silvertop

20V Silvertop (AE101 20 valve "Silvertop") is a revision of the 16 valve version of 4AGEU, found in the Toyota AE101 Corolla. A TRD variant of the engine was used in Takumi Fujiwara's Toyota AE86. In the manga, Bunta Fujiwara references purchasing a dry sump oil system for the AE86 prior to the swap and strangely enough, came with carburetors.


 * Engine Type: Group A/ N2
 * Model: AE101 4A-GELU
 * Layout: FR
 * Displacement: 1597 cc
 * Horsepower: 245 PS
 * Transmission: TRD Crossed 5 w/ 5.375(Second and Third Stage) and Crossed 3 w/ 4.778(First and Fourth Stage)

Real-life counterpart
The real life example of the engine is a silvertop 4AGE with TRD specs, powering an AE86 Corolla Levin, owned by Akira Iida, famous Japanese racer and 1995 24 hours of Le Mans GT2 winner. The engine was de-tuned from a 11,000 RPM redline to 9,000 for engine preservation and drive-ability on the street.

The engine was not available to the public unlike the Formula Atlantic counterparts.

Specs

 * TRD AE101 4age block with custom Toda parts
 * TRD Early I-Beam connecting rods
 * TRD Semi-Forged pistons
 * TRD Late-model 3-stage Dry Sump System with Barnes Pump
 * TRD Crankshaft
 * TRD 6-point adjustable Camgears
 * Custom stainless steel valves
 * Custom Intake/Exhaust 288/294 degree cams with 10.2mm lift
 * Downsized from the TRD 304/312 10.8mm lift for more street ability; as higher duration and lift decrease low rpm torque.
 * TRD Flywheel and Full-Race clutch system
 * EFI individual throttle bodies retained
 * MoTec M4 ECU

Differences to anime and manga
The manga and anime (The latter occasionally, appears inconsistently) correctly features a TRD dry sump oiling system. The anime changes from the TRD Japan and TRD USA oil pan in the different stages; but remains as the TRD Japan oil pan in the manga.

Instead of the standard Electronic Fuel Injection system, the manga illustrates twin 45 DCOE weber carburetors (Spanish variant) mounted on TRD manifold. This is likely because of Bunta's appeal for carburetors.

The anime does feature a EFI system, but varies from scene to scene. 2nd stage onwards has the standard silvertop individual throttle bodies, where Fifth and Final stage has the engine appear more like a Late TRD spec; outside fuel injectors and longer intake manifold.