I use AP 600, which is now branded R2. https://www.apracing.com/products/ra...ake_fluid.aspx I have a fairly stock brake system with aggressive pads and I stopped experimenting with fluid when I found AP 600. (Motul is junk, IMO) Get 2 bottles. You really only need 1, but if you're just becoming familiar with the Viper's brakes, you will probably get into a second bottle.
Because I've tried it and had some issues. Back when all there were were G1 & G2 Vipers, everyone was swearing by Motul 600, saying it was awesome stuff, then in the next sentence they would talk about how they had to bleed their calipers almost every session???? WTF? I will say that Motul is easy to find at motorcycle shops, so if you're in a real pinch, you aren't SOL.
The thing to remember most of all is brakes won't cool if your foot is on the brake pedal. Use them only as hard as needed, then get your foot on the gas pedal. As Bob Woodhouse always said: "Brakes just slow you down."
As to moisture susceptibility, I have gone months and many track weekends and time trials never having to touch the fluid.
96 GTS - some exhaust, brake and handling mods.
Last edited by GTS Dean; October 6th, 2016 at 06:24 PM.
I would think that if AP had known issues with ABS system performance, they would put a bold warning on the bottle. The only issues they appear to have had in the past was chemical incompatibility with magnesium components. According to the website, that has been solved.
The website has a scroll button on the top right discussing each fluid's design targets. R2 is recommended for competition use only, while R1&3 conform to MVSS standards. After using Motul, I tried AP 550 (now R1) and it performed about like Motul. I stepped up to 600 and never had a problem thereafter.
Last edited by GTS Dean; October 7th, 2016 at 08:11 AM.
Silicone based brake fluids gum up inside ABS modules. I've seen it myself. Google it. If the high performance fluids are silicone based that should be considered. I'm not saying they will or they won't cause issues.
I am headed to Road America tonight. I have Castrol in right now . I am bringing AP with me. I just installed Carbotech XP20's. I wanted to see how things felt with the Castrol in it since I have been running it all season. Wanted an apples to apples on the switch from XP 12 to XP20 pads. Then I will run the AP and see what I feel with it. I will say the
Castrol has been great so far this season. It is better than the Motul.
I ran RA with PFC 97 front pads (VERY aggressive) and had rotor temps over 1300F. The rotors were new and bedded for that weekend, and were essentially used up afterward. I never had any fade or performance issues the whole weekend.
Last edited by GTS Dean; October 7th, 2016 at 09:19 AM.
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