Girodisc 2pc 348-355 Front rotors released

AWESOME!!!!!!!

I searched the website but I didn't find any info on the 348 setup.


JL

 

A solid but similar design rotor with directional vanes would be a nice compliment for the rear, and I think would help you sell front rotors too. I know that I am too obsessive to have different appearing discs front and rear. I also found I had more heat issues on the rear than the front, I believe due to the air ducts for the front rotors that are absent in the rear on the 355. Directional vane rotors would help.

And what about the 512 TR? There's a big car that would use some brake cooling help.

 

They look bad ass!!! Do you have matching slotted rears 'without' the aluminum center (due to the tight tolerance)??

 

Outstanding!

I'd have to add that knocking 13 pounds off of the front wheels is also going to lighten the 348's manual steering input (by the driver) for slow speeds such as parking the car.

...so your new technology is for more than just racing. 348 Spider drivers should appreciate the easier steering.

 

Agreed. Nice product, but more info and pricing would be helpful. Add that and my next brake service will see your parts installed on my 348.

 

+1

 

This will do nothing for felt steering effort. My question is if I can trigger the ABS with the old system which is the 348 braking threshold what does the new design do? I expect it to trigger the same way and have the same stopping distances assuming the same heat capacity. Steel mass is what has the heat capacity to absorb the friction of stopping so if you drop the mass with a floating hat and rotor more heat must go into the caliper and brake fluid at the same car speed? Slotting just takes care of pad outgas and used friction material waste but does not help heat capacity. "Floating" helps with brake feel as uneven pad and rotor wear increase harmonics felt as poor braking and help prevent rotor distorsion from heat and thus more uneven pad wear. So that is good. But beyond the small benefit of floating rotors and slots and the cool factor, where else am I going to benefit? What am I not understanding? Oh less unsprung weight is good.

 

FWIW, it is damn hard to get the 348 ABS to engage. I was only able to get mine to activate once, and that was during a serious spin toward a tire-wall in wet grass at VIR. That was the only time the pump has activated in my ownership of the car, and I've stood on the pedal plenty of times.

 

I agree about the ABS never activating on my car - you need some really slippy surfaces to do that and since I don't drive in those conditons, I can't remember the last time they went off - wonder if they work... The only thing I can think of is, with a lower weight, will the wheels have a lower rebound rate and, hence, be more likely to activate ABS if the car hits a sharp bump under breaking? Minor, but it happens, especially near my corner at home.

I like the two piece rotor design for its heat dissapation (less likely to warp rotors, better hub and bearing life in the long run and maybe better pad life as well. And the less weight at the corners the better. I find the gas slots kind of gimickey on the street, but I like the look. I also agree that having a matching slotted rear set would balance the look even if they are totally stock otherwise.

Now, what do those biyotches cost?

 

+1

 

I have a question for the guys at Girodisc. Do you have a larger disk available with an offset bracket for the stock caliper? This is a very common setup on motorcycles, and just wondering if it is available for the 355. The stock disk just looks kind of silly inside the wheel because it is so small. Especially when the car is sitting next to my wife's CLK55. How times have changed! BTW, I love the 2 piece design.

Darrell.

 

How much do they cost?!

 

Ha! You're a very funny guy. You're baiting me! You're trying to win yet another free dinner at my expense, I can tell.

Yeah, as if putting a 348 rotor onto a bicycle, or replacing a 348 rotor/caliper with a bicycle brake would see no difference to either bicycle or 348 in steering feel!

Not!

 

Eric, thanks for the reply. It would be a great alternative to new calipers and such if the offset brackets and larger rotors would work out. Keep us posted. You guys really do a great job.


Darrell.

 

for you guys that don't activate ABS I do it all the time. My car lives on slicks too so my tire grip is very high. I probably have somewhere between 1 and shy of 1.5 G braking on a 2800lb 348 with a wing. I don't know about you guys but IMO you aren't going deep enough into the corners if the ABS is not coming on.

 

Thanks Eric! So my stoping distances may not decrease or will they decrease because the rotational mass is less?

 

Eric,

Most 348 guys interested in more performance have long abandoned the 17" 348 stock wheels for 355CH wheels , 355 wheels or some other 18" varient. So concern ! may not be much of an issue. In fact you really need to get a bigger disc in there and fill up that wheel ala 430ch

As to cast oem caliper mountings Bremob already put stress on there with their GT big brake kit and perhaps even more stress in the unconfirmed larger challenge brmbos which are rumoured to be even bigger. I have seen 348/355's with up to 14" rotors

it would be great to see a competitor to Brembo at less than Brembo blood money and the great service you and martin give to their drivers.

By the way Stoptech has a 348/355 big brake system but know one is using repositioned stock OEM Calipers and bigger disks. You could be the first. 90% of your buyers would be not track guys and this set-up would be a decent lowcost compromise. For the 10% or less of us racers well I seriously want bigger brakes but am not convinced in the performance per dollar for my driving style. I seem to use OEM parts just fine and or a mild track only pad and have long life in my pads and rotors as a mid-pak open class racer on some very high speed tracks and seriously fast cars. My only modification 3" brake ducts seem to keep brakes cool and fluid from boiling. I have never had an on track fade issue. Maybe I am still not going fast enough. But I guess if bigger brake would get me on and off threshold braking a 1/10th or so quicker that could be 1 second on an average race track or a car length or two diving into a corner to pass big brakes would then be worth it. So beside the obvious ability to have "reserve" for repeat brake flogging with a big brake , does the big brake get me to "on and off" threshold braking faster than what a little brake can do eventhough you can achieve threshold braking with either big or little brakes?

 

Wondering too....honestly I'm not trying to wring out every last tenth of speed from the 355. I'll drive it daily, maybe a track day here and there, but not on a regular basis. My STi race car has the lightweight 2 pc. rotors, but if price is excessive I really don't need these for the Ferrari...

FWIW, I recall paying $700 for the two front 2-pc STi rotors.

 

Eric,

Here is my 348/355 wish list: First 348 and 355 brakes are the same. So you can cross two model lines with one product. I am in Redondo Beach area so I am accessable to you. I’m a club racer only, so if you make a caliper extension bracket to use the oem caliper I would be glad to test it for you on the track and write up the install here on Fchat. I would like to see at least 1” larger diameter rotor than stock. Since you have hats already you have all the dimensions. Perhaps this would be an easy project for you. Last on my wish list would be OEM sized rear floating rotors and aluminium hat in the OEM caliper position with NO parking brake. This would take huge amount of weight out of the back end of the cars where it is needed most. I have even thought about machining out the internal parking brake mass of metal on the OE rotor but I am unsure of how that will effect the ultimate safety of the rotor.