The 911 is back and it's "proper" RWD.

[Mokei Kagaku 2934]

58740 Porsche 911 Carrera RSR 2.8 (BT-01 chassis)

[Frog Jumper 3844]

 

[Pylon80 3675]

4 hours ago, Mokei Kagaku said:

58740 Porsche 911 Carrera RSR 2.8 (BT-01 chassis)

The BT-01 certainly looks like 1973 technology!

[Dan1891 228]

I wish Tamiya someday release those classic cars on simpler chassies like the originals back then...But i guess there is no market in that.

[Kowalski86 4273]

10 minutes ago, Dan1891 said:

I wish Tamiya someday release those classic cars on simpler chassies like the originals back then...But i guess there is no market in that.

I wish they'd release them on chassis with bearings/CVAs and that handled nicely out of the box...but I guess there's no market for that either.

[Mouc-RC 650]

These rims...

[An_RC_Guy 185]

Quite the looker if you ask me. I wonder how it compares to the TT02 based Carrera RSR in terms of driving and then in terms of proportions with that wide rear end? Sounds like I need to purchase this one to compare...

[Pylon80 3675]

21 minutes ago, An_RC_Guy said:

Quite the looker if you ask me. I wonder how it compares to the TT02 based Carrera RSR in terms of driving and then in terms of proportions with that wide rear end? Sounds like I need to purchase this one to compare...

Seriously, there's nothing wrong with the BT-01 and anything RWD makes more sense than anything AWD for the Porsche, however: the one thing that the BT-01 would need is a rerelease of the super grip radial wide tires, but Tamiya didn't bother There isn't any off brand tire available in 32mm or even 30 that is sticky enough to be enjoyable or isn't a premount tire with insufficient offset for the Porsche (it needs +10). So I fear this gorgeous kit will be driven with racing slick wide, people will find it difficult to drive and it'll make a bad name for RWD 😞

[Kowalski86 4273]

6 hours ago, An_RC_Guy said:

Quite the looker if you ask me. I wonder how it compares to the TT02 based Carrera RSR in terms of driving

When I ran on-road cars my MB01 (which is basically a smaller BT01) had much better steering out of the box than my TT02s, and despite being 2wd it was fairly planted. It has a higher CoG than the TT02 which helps hold the road on asphalt.

The main things that held it back were gearing, and the sloppy rear suspension which can effect acceleration. There's also less aftermarket if you're into hop-ups.

[Wheel_Nut 376]

In 1973, the RSR ran 15" wheels.  A tamiya 52mm wheel isn't very scale for this car anyway.

[Kowalski86 4273]

18 minutes ago, Wheel_Nut said:

In 1973, the RSR ran 15" wheels.  A tamiya 52mm wheel isn't very scale for this car anyway.

I think for a truly "scale" 911 on-roader, or at least something close. Someone needs to take an M06, some TL01 bits, and stretch it to 251mm. I wouldn't mind a touring sized, RR on-road car.

[Wheel_Nut 376]

Perhaps it would be more scale to do a vintage Porsche on either XM-01 or the M-08 chassis at 239mm and have higher offset rear wheels.

[OoALEJOoO 3283]

@Mokei Kagaku thanks for sharing!

If the BT-01 is built with a stiffened/locked front diff it should perform quite well as RWD, up to Super Stock TZ power using the standard wide rear tyres. Having said that, IMHO a RWD converted TT-02, also with stiffened/locked front diff, would be a better kit than a BT-01.

Any additional power, say LiPo or brushless, would benefit from a flipped front one-way instead of the stiffened/locked front diff.

*Edit: If Tamiya would make those Porsche wheels available separately would be fantastic 

[Kowalski86 4273]

1 hour ago, Wheel_Nut said:

Perhaps it would be more scale to do a vintage Porsche on either XM-01 or the M-08 chassis at 239mm and have higher offset rear wheels.

If scale was a big factor in a build I'd go with an M06, both of those options are mid-motor (and 4wd with the XM-01). A set of TL01 arms/dogbones would widen the back end to fill the gaps.

[Jason1145 4685]

It doesn’t look like the rear wheels are lost inside the rear arches any more than the front wheels are, are they supposed to be flush with the arch for a truer look?

I prefer the Supra bodied BT01 anyway so I’ve not got a dog in the race 😂

[Wheel_Nut 376]

I think rear wheel flares should be 4~5 mm wider than the front guards on each side.   So around 8~10mm difference in overal width.

[JimBear 1019]

I guess this is tricky to recreate perhaps, but doesn't the Carrera sticker sit a smidge too high up? it feels a bit big, and the door line marking ends too far up? .

 

[Twinfan 2013]

Just need to drop the decal down a bit when you build it  

[Pylon80 3675]

5 hours ago, Jason1145 said:

It doesn’t look like the rear wheels are lost inside the rear arches any more than the front wheels are, are they supposed to be flush with the arch for a truer look?

I prefer the Supra bodied BT01 anyway so I’ve not got a dog in the race 😂

This is the one from the Penske museum in AZ:

 

[Twinfan 2013]

That's the slightly later 3.0ltr....

[JimBear 1019]

4 hours ago, Twinfan said:

Just need to drop the decal down a bit when you build it  

The 2.7, I think? But yes, you are correct - one needs to get to work with the Tamiyas.

[Twinfan 2013]

Yep, that's a 2.7 but it shows the decal location nicely.

[Mokei Kagaku 2934]

4 hours ago, Twinfan said:

That's the slightly later 3.0ltr....

Yes, and whereas the MY 1973 2.7 and 2.8 were based on the F-generation of the 911, the 3.0 was based on the G-generation. There are major differences between the two generations, but the most obvious one is probably the ducktail spoiler of the 2.7/2.8 and the whaletail of the 3.0, introduced with MY 1974. My guess is that the car in the Penske museum, which is apparently called a "1973", doesn't have its original look anymore and is displayed with changes made to it during its life as a race car, which makes it look more like a G-generation than an F-generation 911. 

F versus G (obviously not RS or RSR, but the differences are basically the same):

 

[Mokei Kagaku 2934]

I checked a little more and was lucky. Here's a photo of the first batch of RSR IROC, photographed at the Porsche Zuffenhausen plant in 1973 before being shipped to Penske. Note the ducktails.and F-generation rear view mirrors.

 

[Kpowell911 2245]

Ive asked my LHS to get me one of these in. I know the BT-01 chassis is flawed but Ive never built one, it makes a change from a TT02, and its a Porsche made by Tamiya so?