4350 replies to this topic

[FLD]

Random thought (might be pish): If you knock up a bias box (which is fairly easy) could you use the two lines from this into the abs block and still get decent bias adjustment? These would just replace the two lines from the OE MC so it might work and give you good adjustment. Alternatively you'd have to bin off the abs and I'm not sure of the implications of doing this.

I think there's a few people who bin their S2 Exige ABS units and replace with dual master cylinders and a bias bar. Only implication is road legality

I didn't know it was illegal? I ran one on a mk2 escort for years! Makes adjustment dead easy with a knob on the dash. You can buy some rubber spacers that lock up the bias bar if one cylinder fails so you still have brakes.

Random thought (might be pish): If you knock up a bias box (which is fairly easy) could you use the two lines from this into the abs block and still get decent bias adjustment? These would just replace the two lines from the OE MC so it might work and give you good adjustment. Alternatively you'd have to bin off the abs and I'm not sure of the implications of doing this.

your over-thinking this....

MC to ABS is only 1 pipe per cct (front/rear), if you want to fit a bias valve, you have to do it BEFORE the ABS unit - otherwise it (the ABS) will not understand what's going on as you have just detached it from the wheel calliper and thus it does not know what pressure the line is at.

In this case, I don't know how well the ABS is going to cope with the change of callipers as well as the change in tyres sizes (from what it was configured for), the std tyres are only 1.6% different, the Kuhmos are some 9% different, so I suspect not well!

So the ABS unit is the issue and not the bias adjustment?

[techieboy]

I didn't know it was illegal? I ran one on a mk2 escort for years! Makes adjustment dead easy with a knob on the dash. You can buy some rubber spacers that lock up the bias bar if one cylinder fails so you still have brakes.

Probably more to do with removing an ABS system from a car that comes with it as standard. No no as far as the MOT is concerned (in theory).

[fezzasus]

I didn't know it was illegal? I ran one on a mk2 escort for years! Makes adjustment dead easy with a knob on the dash. You can buy some rubber spacers that lock up the bias bar if one cylinder fails so you still have brakes.

Probably more to do with removing an ABS system from a car that comes with it as standard. No no as far as the MOT is concerned (in theory).

This. I think removing ABS from a car sold with it is an issue.

[The Batman]

[Scuffers]

So the ABS unit is the issue and not the bias adjustment?

eh?

to which issue are you referring?

[The Batman]

so mike when is the front wing coming

[FLD]

So the ABS unit is the issue and not the bias adjustment?

eh?

to which issue are you referring?

The issue, as I read it, was one of bias but it seems that this is OK and is done before the abs unit.

I must confess that I only read the most recent page *hangs head in shame*

[GeorgeBC]

so mike when is the front wing coming

Looks like a kid with braces

[Scuffers]

So the ABS unit is the issue and not the bias adjustment?

eh?

to which issue are you referring?

The issue, as I read it, was one of bias but it seems that this is OK and is done before the abs unit.

I must confess that I only read the most recent page *hangs head in shame*

and quite right too!

Back to basics, brake balance - static balance can only be changed by a change of calliper(s) or going with a split MC setup.

a bias valve is just a line restrictor, ie. it limit's the pressure in the line from a set-point, ie, it can only make the brakes less effective, ie:.



this is an example of what one does, once you are past the set-point (or crack point as shown) the line pressure rises at a lower rate than the input pressure, usually they are 1:3 or 1:4 ratio (the one in the pic looks more like 1:2?).

with the setup Mikes car has now, ~700Psi is locked wheels point (at speed), so from that you can see what effect one has.

[leevx2.2]

so mike when is the front wing coming :D/>



:D/>

Mental lol love it

[chris_uk]

i wonder how long the tyres will last with all that extra downforce.

[The Batman]

i dont think he is northern so this doesnt matter

Edited by joe_589, 26 February 2013 - 06:09 PM.

[chris_uk]

you get my message btw joe?

[The Batman]

yeah, will give em to cliffie next time i see him

[chris_uk]

fank ooo

[jamiewillson]

LOL regarding the wing comments. This picture makes it look far bigger than it really is and it won't give as much downforce as you probably think. It's just to sort the front-to-rear balance if we crank the rear wing up. It might not even work, but we'll find out soon enough at Mira. It'll get people talking, that's for sure!!!!!

[Scuffers]

i wonder how long the tyres will last with all that extra downforce.

if it all works, longer as they won't be sliding so much......

[Mike (Cliffie)]

LOL regarding the wing comments. This picture makes it look far bigger than it really is and it won't give as much downforce as you probably think. It's just to sort the front-to-rear balance if we crank the rear wing up. It might not even work, but we'll find out soon enough at Mira. It'll get people talking, that's for sure!!!!!

Only just got the rear wing today Jamie, one at a time please.

I realise you are now Jamie Two Wings but I still have more likes than you on FB!

[chris_uk]

i wonder how long the tyres will last with all that extra downforce.

if it all works, longer as they won't be sliding so much......

be interesting to see.

i always thought the more weight, be it aero or kerb weight pushing down onto the tyres the more that tyre will wear out/scrub etc..

Edited by chris_uk, 26 February 2013 - 07:24 PM.

[Scuffers]

i wonder how long the tyres will last with all that extra downforce.

if it all works, longer as they won't be sliding so much......

be interesting to see.

i always thought the more weight, be it aero or kerb weight pushing down onto the tyres the more that tyre will wear out/scrub etc..

Mass, yes, downforce no.