Well I've just got back from our 'Yorkshire Bitter' Tour having completed 800 miles or so of the Dales. I'm pleased to report that the C-ABS is now much sharper having had HEL lines all round courtesy of Arthur and a Full Bleed from my local Dealer. I'm a Happy Bunny for the moment!
The angles on the blocks you have on those ABM/Hel lines seem to fit much 'nicer' than my R&Gs but I agree the performance seems to be sharper than the OEMs. Used mine now for a week and am very pleased! Just need to save up an get a Brembo RCS master and my brake mods are complete
I'd be very interested to see how that goes Slick? Reason being is I'm not sure how (if any) it'll benefit from an upgraded MC as it has no direct contact with the hydraulic pressure reaching the calipers as this is dictated by the on board Pewter via the various pressure regulators etc etc
Yes, you're right there Sinewave, the ABS ECU will decide how much pressure can be applied at the pistons but from the reviews I've read the RCS can give much better feel than OEM and this is what I'm after . Peeps spend a wad of money of cash on carbon bling and get a tonne of respect but spend that on an ABS and all of a sudden its a waste of money, yes there are some that will say the C-ABS will negate the performance afforded by the RCS but at the end of the day I'm a stubborn fooker and need to find this out for myself! If this does not improve things it deffo will not make things worse, and when I come to sell that's extra pennies when I put it for sale on here
Feel is all about the ratio of the master and slaves. The formula you need is: MC Piston Area i.e. Area of a circle =(3.1416 x piston diameter squared)/4 Master / Slave = Ratio For example: Brembo M4 monoblocks have two 34mm/34mm pistons so using a RCS 19 mm diameter master cylinder gives 7263.4 / 283.53 = 25.6:1 ratio. Nice ratio. Modulation Characteristics: 30:1 - soft 27:1 - sweet spot 23:1 - firm 20:1 - wooden When you change the leverage applied I.e the Falcrum you adjust the amount of leverage you apply to the piston again changing the feel, IMO a more efficient or effective master will change the feel you have even with the abs system. After all you he rider are applying the input to the system. What I don't know is the piston size of the ABS master so unable to say what it will work out but IF you were to measure it and record the pivot or Falcrum you can calculate/see what your going to change. At least with the ABS it will take away any errors in ratio calculation as if a small bore master is used with large piston calipers it's possible to create a ratio that feels easy to apply brakes good for high speed pre calculated stoping power but not so good for unseen emergency stops in town! The ABS however would prevent wheel lockup even with soft ratios.
^^ I love it when you can use maths in real world scenarios!! So using this ratio I calculate for the 32/30 Tokicos on my ABS (I think that’s what they are) I would have 6044.4384/ 283.5294 ie 21.3:1 between wooden and firm, Ultimately I’m after a firmer lever but still have a good degree of modulation – would the RCS just be too firm, any thoughts Arthur?
I don't think the ratio would be too wooden, but we all have different personal preference, I know ABS riders who run RSC master and say the feel is better. As the math shows the ratio is not outside of what's unreasonable. And yeah, I hate maths but sometimes it works...lol
OK now I'm really confused. I've got a table of ratio comparing the different setups. According to the maths the OEM set up should feel similar to a full brembo 19 RCS and M4 set up??? Now I've test ridden a 848 and they feel totally different. They both want to rip up the tarmac when putting on the anchors but the duke just feels more positive whats up with that? Is it just purely stiffness of components?
Ducati run a 18mm master. They says it's 19mm but it's not, I've measured it. ratio using 18mm MC with M4 monoblocs- 7263.4 / 254.47 = 28.6:1 Hence why it feels easy and powerful.
Thanks Arthur! I guess I just need to whack on a 19mm MC and see how it feels, the question which one Brembo Galespeed Accossato AP nissin ISR!! etc and whether I should buy fixed or variable ratio? Choices choices
Tough call, a lot of it's down to personal preference as you know mate. I am a fan of the CNC Brembo....lol Don't have one though just a RCS for me... Brembo state 19x20 for the road and 19x18 for track but most use the later where ever.
