To help ensure continued joyful use of beloved cars in the best possible condition for years to come, these two GR Heritage Parts—while retaining their original basic design and specifications—have been modernized using the latest simulation technology, manufacturing methods, and materials.
Main features of the parts to be reproduced and reissued
■ Cylinder head sub-assembly
The cylinder head sub-assembly features combustion chambers with additional machining that lessens the untouched cast surface area, reducing differences among individual engines that arise from slight variances in compression ratios. The intake ports undergo a coating process to reduce pre-polishing surface irregularities. Cam cap knock pins, which were originally only partially used, have been added throughout for improved assembly workability.
■ Cylinder block sub-assembly
The cylinder block sub-assembly features cylinder bores that undergo a modern honing process to improve bore machining precision. Durability has been improved through the use of higher-rigidity cast iron and simulation-based modification of the crank-cap structure.
■ Responding to customer requests
Responding to customer requests received during various events, certain intake and exhaust ports of the cylinder head sub-assembly have been given thicker walls. The cylinder block sub-assembly also now includes bosses and ribs for transverse mounting, enabling its installation not only in the AE86 but also in front-wheel-drive vehicles.
The GR Heritage Parts announced today, along with an AE86 equipped with an engine assembled using these parts and that has been restored using currently sold GR Heritage Parts, are to be exhibited at the “Initial D 30th Anniversary 2days”*4, an event at Fuji Speedway (in Japan’s Shizuoka Prefecture) scheduled for the two days of Saturday, September 13 and Sunday, September 14. Customers can preorder the two new GR Heritage Parts for the first time at the event’s GR Heritage Parts booth. Please check at the booth on either of the two days for details on the parts and post-preordering timetable.
Information on ordering after the preorder period will be announced on the TOYOTA GAZOO Racing GR Heritage Parts website*5 in due course.