20V Silvertop

20V Silvertop (AE101 20V Silvertop) is Toyota's TRD Group A engine (inspired by the 16V 4A-GE), a version of 4AGEU, found in the Toyota AE101 Corolla. In the manga, Bunta Fujiwara references purchasing a dry sump oil system for this car prior to the swap and strangely enough came with carburetors.


 * Engine Type: Group A
 * Model: AE101 4A-GELU
 * Layout: FR
 * Displacement: 1597 cc (97.3 cu in)
 * Horsepower: 245 PS
 * Transmission: TRD Crossed 5 w/ 5.375(Second and Third Stage) and Crossed 3 w/ 4.778(First and Fourth Stage)
 * Due to their durability, performance, and relatively low cost, the 4A-GE and 4A-GZE engines and their derivatives have been popular with both professional and amateur racing since their introduction. The most notable application of the 4A-GE in racing was as in the Formula Atlantic series, where in the full race setting the engine will produce 180 kW (242 hp; 245 PS) at 10,000 rpm.￼

Real-life counterpart
The real life example of the engine is a TRD group A silvertop 4AGE powered 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 (Same as AE92 4AGZE rods)
 * TRD pistons
 * TRD 20 valve 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 TRD 304/312 10.8mm lift for more drive ability as higher duration cams and lift decrease low rpm torque.
 * Toda Flywheel
 * Toda 3 puck clutch
 * EFI individual throttle bodies retained (Manga differs by featuring twin spanish DCOE webers )
 * MoTec M4 ECU

Differences to anime and manga
The manga and anime (The latter occasionally, appears inconsistently) correctly features a dry sump oiling system but instead of the standard Electronic Fuel Injection system, it uses two DCOE weber carburetors (Spanish variant). This is likely because of Bunta's appeal for carburetors.

The anime however correctly features the EFI, but varies from scene to scene. 2nd stage onwards has the standard silvertop individual throttle bodies, where as Fifth and Final stage has the engine appear more like the Formula Atlantic spec, with outside fuel injectors and longer intake manifold.