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Median
Median New Reader
4/12/22 7:25 p.m.

In reply to j_tso :

There is no spec gearbox in WRC. The new hybrid unit is a spec component, but how it interacts with the transmission is up to the teams. 

The new 2022 Rally 1 cars are not based on production body shells and they are allowed to stretch or shrink the silhouette to match the new regulated size. So in theory a Corolla Rally 1 would be the same size as a Yaris Rally 1.

te72
te72 Reader
4/12/22 11:19 p.m.
Pete. (l33t FS) said:rent car.

Not that it matters for anything but marketing, as a production GR does not have a 4 cylinder engine, clutch diffs (Torsen diffs are banned, if they even wanted to use them), or a semiautomatic transmission.

My understanding of Torsen diffs is that if you have one wheel off the ground, you have zero drive on the planted wheel, acting like an open diff. I can confirm this to be the case with Miata Torsen diffs, though I'm not sure how that would apply to an awd.

 

If that is the case... seems like a bad fit for a car that occasionally (frequently?) has at least one wheel off the ground... if not more.

rslifkin
rslifkin UberDork
4/13/22 8:04 a.m.
te72 said:
Pete. (l33t FS) said:rent car.

Not that it matters for anything but marketing, as a production GR does not have a 4 cylinder engine, clutch diffs (Torsen diffs are banned, if they even wanted to use them), or a semiautomatic transmission.

My understanding of Torsen diffs is that if you have one wheel off the ground, you have zero drive on the planted wheel, acting like an open diff. I can confirm this to be the case with Miata Torsen diffs, though I'm not sure how that would apply to an awd.

 

If that is the case... seems like a bad fit for a car that occasionally (frequently?) has at least one wheel off the ground... if not more.

Generally, yes, as the torsen can give a multiple of the torque the lower traction wheel is receiving to the higher traction wheel.  0 x 5 is still 0.  Although it's possible to build a torsen that has some amount of pre-load (and can transfer some power while a wheel is off the ground).  The Eaton True-Trac in the front of my Jeep is a pre-loaded torsen, for example. 

clshore
clshore Reader
4/13/22 12:41 p.m.
dculberson said:

I wonder if they'll sell a crate engine of this motor. It would be sweet for swapping. 300hp 3.cyl heck yeah. 

Yes, I'm doing a 200 HP Honda L15B7 swap into a Spitfire/GT6, but the GR motor would be even better!! Shorter, lighter, more powerful ...
Anyone know what Totota RWD transmissions might mate to this puppy?

There is BTW, a Japanese project underway to do a RWD GR swap.

 

te72
te72 Reader
4/14/22 12:59 a.m.

In reply to rslifkin :

Hadn't considered the idea of pre-load, that makes sense. I'm more familiar with how clutch pack diffs like the one in my Mk3 Supra work. When shaking down the Exocet, I forgot to install the front sway bar (the rear was never removed from the subframe), and it had a comical way of lifting the inside rear wheel on turns. Bit of a bummer on corner exit on an autocross, but downright spooky and kinda unpredictable in slaloms...

te72
te72 Reader
4/14/22 1:02 a.m.

In reply to clshore :

In regards to a Toyota transmission that would bolt to this G16, you might look into the specs on a W58. They can handle some power, though they're not the best if you plan on abusing it. Fortunately there are plenty of them in the wild, and they're a great shifting transmission for RWD applications.

 

Alternatively, and perhaps even a better option, would be the Aisin six speed that you find in the FRS/BRZ/86, S2000, Miata, RX8, etc.

 

Speaking of gearing though... does anyone know what the final drive ratio on the GR Corolla is supposed to be? Seeing transmission ratios is nice and all, but that doesn't help much when trying to calculate gear speeds for autocross use. =)

clshore
clshore Reader
4/14/22 10:30 p.m.

Here's a link to the Japanese GR16 RWD swap into an AE86:

Is this Yaris GR-Powered Toyota AE86 the best JDM restomod ever? (sxdrv.com)

And apparently, you CAN buy the motor directly from Toyota (hint: bring the BIG wallet)

Pete. (l33t FS)
Pete. (l33t FS) GRM+ Memberand MegaDork
4/15/22 10:59 a.m.

Read up on the engine, it is the spec engine for a GT86 based one make series.

BoxheadTim
BoxheadTim GRM+ Memberand MegaDork
4/15/22 12:25 p.m.

In reply to Pete. (l33t FS) :

So they're not using the FA for that series? I wonder why.

j_tso
j_tso GRM+ Memberand HalfDork
4/15/22 1:10 p.m.

Unless there's another series, everything I've read about the Toyota 86 series and GR Cup says they use the FA.

t321sg
t321sg New Reader
6/9/22 9:09 p.m.

In reply to gearheadE30 :

Agreed - When I am driving it, I only see the dash. Exterior styling is only important when you leave it sit in the driveway and stare at it from the porch. And why would you buy this car for that?

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