Fantastic, thats the feedback Id hoped to hear. As with everyone else, I speculated it wouldnt make a difference but good to know at least someone tested it with data.

 

does anyone know what app this guy is using?


Going to proving ground's autox tomorrow, looks like an app already has the course mapped out

 

That is the factory camera/data logging PDR setup on newer GM Camaros and Corvettes.

 

fancy! wonder how they got the track map on it. I'm gonna try track addict just setting a start/stop point

 

The app has the ability to set a start and stop point so it can be used to make custom tracks like autocrosses. Track Addict has a similar function and I can't remember if Harry's does or not too.

 

any ideas? only at higher gears, partial throttle (goes away on throttle release)


getting tired of these issues

 

Sounds like tcase or diff.

I'm so glad I sold my Evo. Other than the initial build my A90 Supra has only needed brakes, fluids, and alignment checks in ~15 track days.

 

thinking t case also, but is it common that it only manifests in 4-5-6? zero sound at lower speeds. hint of it in 3rd. I wanted to go back to cusco for front and rear diffs too anyway

 

It's common for a hypoid gear set to not make noise until a certain speed, or a higher speed, or on make noise in a specific 5-10mph range. Etc

 

makes sense. yeah pretty sure t case or diff, jumped a curb going flat out today on the left side only

 

after starting with stock rear diff, then cusco 1.5 type rs, to os giken, to ats carbon hybrid 1.5way in the rear - i'm finally going back to the cusco. while it was the most aggressive in terms of adding a little bit of push, it also provided the most power-on oversteer - ordered the cusco 1.5 141 L15.

Since the t-case is coming out, also decided to swap the ATS diff for a Cusco - the 450F. The 450F and the 450C seem the same except the 450F is 1-way only, while the center spline thing in 450c allows either 1-way or 1.5-way based on the orientation. Figured I'm never gonna change from 1-way in the front anyway, so went with the 450F.

The car hasn't really been providing much power-on rotation for me, so hoping going back to the Cusco 1.5 in the rear will bring it back.

Helps that the USD/yen is pretty amazing right now. https://www.blackhawkjapan.com/?rfsn=7989172.f6c8906

 

scratch that - gonna try the 141F in the rear (1-way rear diff).

 

you want the 141FG

 

the gymkhana version? even if i'm also doing time trials/track days? the 141fg uses a 55 degree ramp angle, and 141f uses a 45 degree ramp angle. so the 141fg will be more aggressive more quickly for lockup right? do i necessarily want that for autox and track days?

 

it is a question of if you turn hard enough on track to unload the inside rear. If the rear gets light you need the high preload to keep the diff working. the ramp angle is not the primary difference between the F and FG versions.