Knowing your brake system: Balance, Caliper, Rotor and Available Options

[Racingbrake]

RacingBrake is pleased to present this brake system evaluation to Viper community.


http://cimg9.ibsrv.net/gimg/rennlist.com-vbulletin/586x478/80-bias_evaluation_9711537b25662f738853374ecaf8a82125 8eb6a8.jpg

[gatesy21]

Does this allow 18s on the rear as well?

[Racingbrake]

Yes. Usually the front kit requires more space (larger rotor and larger caliper) than the rear kit to fit under the wheel, so our design parameter is based on the front kit.

[ViperGeorge]

I've installed the rear bias calipers from Racing Brakes and they did wonders for braking on my TA 2.0. I can use race pads in the rear again (I was using OEM pads in the rear to try and deal with rear end wiggle under braking) and the rear end wiggle under braking is virtually gone. Easy kit to install. On the track I am now much more confident in the brakes. A great investment. I don't know why SRT didn't engineer the brakes like this in the first place.

[racegate]

RB, do you have this info for the non-ACR models? Is the RB Kit posted above for ACRs only or non-ACR? I'm curious how the bias ratio compares to address the "rear end wiggle" issue during high speed braking in non-ACRs.

[ViperGeorge]

RB, do you have this info for the non-ACR models? Is the RB Kit posted above for ACRs only or non-ACR? I'm curious how the bias ratio compares to address the "rear end wiggle" issue during high speed braking in non-ACRs.

See my post above. My car is a TA 2.0 not an ACR and the kit definitely helps eliminate the rear end wiggle. There is still a very slight hint of it on initial brake application but no where near like what it was. I'm very happy with the brakes now.

[Racingbrake]

RB, do you have this info for the non-ACR models? Is the RB Kit posted above for ACRs only or non-ACR? I'm curious how the bias ratio compares to address the "rear end wiggle" issue during high speed braking in non-ACRs.

The proposed kit fits ALL G3/4/5 models as our brake kits are built to spindle specific, instead of models as ViperGeorge confirms.


See my post above. My car is a TA 2.0 not an ACR and the kit definitely helps eliminate the rear end wiggle. There is still a very slight hint of it on initial brake application but no where near like what it was. I'm very happy with the brakes now.

If you wish to fine tune your brake system to be "more" perfect, you may consider over-sizing the front rotors to 370mm (=RB recommended track kit), although it's the largest rotor dia. yet still clears 18" wheels, but if you review the evaluation table you will notice CCB set up has a larger front (390mm) vs. rear (360mm), so a larger front rotor can definitely further achieve an optimal brake system.

[ViperGeorge]

The proposed kit fits ALL G3/4/5 models as our brake kits are built to spindle specific, instead of models as ViperGeorge confirms.



If you wish to fine tune your brake system to be "more" perfect, you may consider over-sizing the front rotors to 370mm (=RB recommended track kit), although it's the largest rotor dia. yet still clears 18" wheels, but if you review the evaluation table you will notice CCB set up has a larger front (390mm) vs. rear (360mm), so a larger front rotor can definitely further achieve an optimal brake system.

How much clearance will there be with the bigger rotors and 18 inch wheels? So you believe the larger rotors in the front are necessary even with the rear bias calipers? How much are the rotors? Can I still use the larger TA pads in the front?

Thanks,

[texasram]

Im also interested in the rear end wiggle stoppage

[ViperGeorge]

Im also interested in the rear end wiggle stoppage

The rear bias reducing calipers largely took care of the rear end wiggle in my car. Put them on Thursday went to the track Saturday and there was a huge difference. I was much more confident in the brakes and in fact stopped thinking about them. Before entering a braking zone I would always worry about how bad the wiggle would be. This caused me to brake early and not as hard. My local track has a long straight with a hard braking zone at the end. I hit >145mph and this was the first time I felt confident to try going deeper into the braking zone. Heck even my 09 ACR had some wiggle and now my TA is better than even that car.

[Racingbrake]

How much clearance will there be with the bigger rotors and 18 inch wheels? So you believe the larger rotors in the front are necessary even with the rear bias calipers? How much are the rotors? Can I still use the larger TA pads in the front?

Thanks,

The clearance is checked with a feller gage to be about 2.5mm.

You can learn more from these discussions:


BBK under stock 4 pot caliper (http://driveviper.com/forums/threads/12576-BBK-under-stock-4-pot-caliper?p=200178&viewfull=1#post200178)

Anybody tried the 370 mm rotor upgrade? (http://driveviper.com/forums/threads/14268-Anybody-tried-the-370-mm-rotor-upgrade?highlight=brake)

This front oversize disc is the same as we used for building two piece rotors for CTS-V /Camaro ZL1 upgrade at 370x34mm (vs. Viper's 355x32), where RB two piece is a very popular installation for serious track guys. The disc has a annulus width of 65.5mm, wide enough for OE pad @65mm, so yes it's sure can accommodate TA's 60mm lining width.

A larger rotor provides more thermal capacity so you can run the brake at lower temperature and extend the life of your brake components.

[Martin]

Do you guys have an OEM compatible replacement set of pads for those of us who have ACRs with CCBs? It seems like the only real option right now are the OEM pads, and they're pretty expensive... It would be nice to see some other options out there that are a direct fit and don't accelerate wear on the rotors.

[Racingbrake]

The rear bias reducing calipers largely took care of the rear end wiggle in my car. Put them on Thursday went to the track Saturday and there was a huge difference. I was much more confident in the brakes and in fact stopped thinking about them. Before entering a braking zone I would always worry about how bad the wiggle would be. This caused me to brake early and not as hard. My local track has a long straight with a hard braking zone at the end. I hit >145mph and this was the first time I felt confident to try going deeper into the braking zone. Heck even my 09 ACR had some wiggle and now my TA is better than even that car.

The effect of brake bias is predominated by the caliper piston size (hydraulic brake pressure) and rotor diameter (brake torque arm), COF (Coefficient of Friction) is a combining result of two mating substance i.e. rotor & pad which (COF) is variable and dependent on operating temperature; while brake pressure and rotor diameter remains constant (never change), this is why a sound and well balanced brake system can't rely on changing the brake pad compound.

[Racingbrake]

Do you guys have an OEM compatible replacement set of pads for those of us who have ACRs with CCBs? It seems like the only real option right now are the OEM pads, and they're pretty expensive... It would be nice to see some other options out there that are a direct fit and don't accelerate wear on the rotors.

This is the ZR1 OE front pad that we modify to fit various CCB (i.e. Aston Martin V12, Ferrari F430 Scuderia, F458 etc., and also for Viper):

http://cimg4.ibsrv.net/gimg/www.mbworld.org-vbulletin/898x385/80-pad_modif_for_viper_ccb_web__09bd023dbe354c61928f5 c24c3c11a33a92c86db.png

Price will be more affordable and since we keep them in stock so it's always available.

We also make the pad by breaking the compound into "street only" and "track only", so you'll have 3 compounds to choose.

[Martin]

Thanks for that info - good to know! How about the rear pads?

[ViperGeorge]

The clearance is checked with a feller gage to be about 2.5mm.

You can learn more from these discussions:


BBK under stock 4 pot caliper (http://driveviper.com/forums/threads/12576-BBK-under-stock-4-pot-caliper?p=200178&viewfull=1#post200178)

Anybody tried the 370 mm rotor upgrade? (http://driveviper.com/forums/threads/14268-Anybody-tried-the-370-mm-rotor-upgrade?highlight=brake)

This front oversize disc is the same as we used for building two piece rotors for CTS-V /Camaro ZL1 upgrade at 370x34mm (vs. Viper's 355x32), where RB two piece is a very popular installation for serious track guys. The disc has a annulus width of 65.5mm, wide enough for OE pad @65mm, so yes it's sure can accommodate TA's 60mm lining width.

A larger rotor provides more thermal capacity so you can run the brake at lower temperature and extend the life of your brake components.

If I'm converting 2.5mm correctly it works out to about 1/8 of an inch. Seems pretty tight.

[Racingbrake]

Thanks for that info - good to know! How about the rear pads?

Rear pad is a direct fit.

[Racingbrake]

If I'm converting 2.5mm correctly it works out to about 1/8 of an inch. Seems pretty tight.

This front 370x34mm RB big rotor kit installation is verified by "Heysie" to have adequate clearance under 18" wheels.
http://driveviper.com/forums/threads/14268-Anybody-tried-the-370-mm-rotor-upgrade?p=253618&viewfull=1#post253618

[sharmut]

Didn't "Heysie" use a Gen4 with aftermarket wheels.... Is the Gen4 ACR and aftermarket wheels the same as the Gen5 with stock Sidewinder2?