[sierra]

Originally Posted by blackfireball5

Thanks for posting this. I remember reading this previously but i couldn't find it.

I think the transmission will hold up just fine adding power to it. If it can handle the IS-F, it should be able to handle a modified FR-S. Right?

The auto sounds very strong but the manual box sounds more limited though.

For those of you who are looking forward to turbo or supercharge your BRZ / FR-S / GT 86 via the aftermarket, however, we must remind you of a crucial caveat that appears on the second photo of this article: “Medium Torque Capacity RWD 6-Speed Manual transmission (AZ6)”. A cursory glance at all the vehicles that have used the Aisin AZ6 reveals that the torquiest of the lot is the S15 Nissan Silvia Spec-R, producing 202 lb/ft. All other AZ6 users produced somewhere between 124 and 163 lb/ft of torque, with stock BRZ / FR-S / GT 86 rated at 151 lb/ft. Notably, when the North American market demanded a manual transmission option for the Lexus IS 300 and its 2JZ-GE 3-liter inline 6′s 218 lb/ft of torque, the Aisin AZ6 (or J160 in Toyotaspeak) was deemed to be too weak. Instead, a W55 variant of the W58 5-speed manual from the naturally-aspirated Toyota Supra and Lexus SC 300 was used. Thus, it’ll be quite interesting to see what Subaru and Toyota engineers would do for a possible future manual supercharged or turbocharged FT-86 variant. Further modifying the existing AZ6? Or doing so with the higher-capacity AY6 (which can reportedly handle over 345 lb/ft of torque)? Or reach out to Getrag as Toyota did for the 233/V160 when it needed a stout yet sporting 6-speed manual for the Mk4 Supra Twin Turbo?

http://kaizenfactor.wordpress.com/20...e-know-so-far/