15 replies to this topic

[Mattias]

[font="arial, sans-serif;"]Hi![/font]

 

[font="arial, sans-serif;"]I've been working on getting a big brake kit front and rear for the VX. Now the collaboration with PB Brakes is at the point when it’s time to check how many are interested in such a kit.[/font]

 

[font="arial, sans-serif;"]The discount will be at least 10%[/font]

 

[font="arial, sans-serif;"]Pads are standard format, so HAWK, AP etc may be fitted.[/font]

 

[font="arial, sans-serif;"]The kit replaces rear brake with retained handbrake function.[/font]

 

[font="arial, sans-serif;"]So how many of you are ready for extreme stopping power and would buy such kit in a group buy in near future?[/font]

 

Best regards,

Mattias

 

More info at: www.pbbrakes.com

 

 

 

 

 

[Gedi]

I'd be surprised if 345mm discs will fit into a 16" wheel.

 

Also, it's doubtful this will increase your stopping power, the standard brakes are more than capable of out-performing the car.

I have AP 4 pots on mine, and I don't stop any quicker than the guys with standard brakes.

[Mattias]

I'd be surprised if 345mm discs will fit into a 16" wheel.

 

Also, it's doubtful this will increase your stopping power, the standard brakes are more than capable of out-performing the car.

I have AP 4 pots on mine, and I don't stop any quicker than the guys with standard brakes.

 

Yes you are correct, 17" wheels are needed.

I don't have the AP 4 pot myself but I've heard some say that it isn't enough. Also I think going big also in the rear will add braking performance.

[P11 COV]

Not sure is possible to improve braking performance by upping brake sizes when the standard can lock up easily enough. 

[robin]

four pots on rear would look great but IMO thats where it ends, you would have to put a brake balance dial in too i imagine to stop the rear locking up 

under hard braking. This i feel would be a bit of a problem area for people if not done right. i maybe wrong on this but imagine not.

 

[Mattias]

Not sure is possible to improve braking performance by upping brake sizes when the standard can lock up easily enough. 

 

I agree when it comes to everyday driving but on track with warm tyres I would like more brake power with less effort and better feeling in braking. 

[Mattias]

four pots on rear would look great but IMO thats where it ends, you would have to put a brake balance dial in too i imagine to stop the rear locking up 

under hard braking. This i feel would be a bit of a problem area for people if not done right. i maybe wrong on this but imagine not.

 

 

The balance shouldn't be an issue since the calipers and discs are bigger in front. But a balance dial is never wrong to be able to fine tune the balance.

[robin]

are these a direct fit or do they require a adaptor plate?

 

i have four pots all ready but a question worth knowing.

[Mattias]

are these a direct fit or do they require a adaptor plate?

 

i have four pots all ready but a question worth knowing.

 

Adapter brackets are included for a direct fit on OEM fixing points, handbrake line-lock is adapted for our brake cables, brake lines, pads and bolts are also included.

[Gedi]

 

four pots on rear would look great but IMO thats where it ends, you would have to put a brake balance dial in too i imagine to stop the rear locking up 

under hard braking. This i feel would be a bit of a problem area for people if not done right. i maybe wrong on this but imagine not.

 

 

The balance shouldn't be an issue since the calipers and discs are bigger in front. But a balance dial is never wrong to be able to fine tune the balance.

 

 

Do you have any calculations to back that up?

 

The brakes are very finely balanced, even so much as a pad mismatch front to rear can throw the whole balance of the car. Here's an accident which shows just how wrong things can go when you get the brake balance wrong http://www.vx220.org...inal-track-day/

 

This seems like a very expensive modification with zero gain and lots of risk.

[Mattias]

 

 

four pots on rear would look great but IMO thats where it ends, you would have to put a brake balance dial in too i imagine to stop the rear locking up 

under hard braking. This i feel would be a bit of a problem area for people if not done right. i maybe wrong on this but imagine not.

 

 

The balance shouldn't be an issue since the calipers and discs are bigger in front. But a balance dial is never wrong to be able to fine tune the balance.

 

 

Do you have any calculations to back that up?

 

The brakes are very finely balanced, even so much as a pad mismatch front to rear can throw the whole balance of the car. Here's an accident which shows just how wrong things can go when you get the brake balance wrong http://www.vx220.org...inal-track-day/

 

This seems like a very expensive modification with zero gain and lots of risk.

 

 

It's the recomended combo by the supplier and it seems like a correct one to me. It's hard to calculate this only by piston and pad area since it depends on how much the rear lifts during braking and that is also different depending on suspension setting.

As said before the calipers and discs are bigger in front and on top of that we have alot of weight on the rear wheels. So my opinion is that is't on the safe side balance wise, but no way of knowing for sure until tested.

 

The price is about the same front and rear as only front kit from AP, so more or less half price in my mind.

 

BR/ Mattias

[FLD]

 

are these a direct fit or do they require a adaptor plate?

 

i have four pots all ready but a question worth knowing.

 

Adapter brackets are included for a direct fit on OEM fixing points, handbrake line-lock is adapted for our brake cables, brake lines, pads and bolts are also included.

 

 

Does this mean that the handbrake activates the caliper hydraulically, perhaps via a cable operated cylinder?

[Mattias]

 

 

are these a direct fit or do they require a adaptor plate?

 

i have four pots all ready but a question worth knowing.

 

Adapter brackets are included for a direct fit on OEM fixing points, handbrake line-lock is adapted for our brake cables, brake lines, pads and bolts are also included.

 

 

Does this mean that the handbrake activates the caliper hydraulically, perhaps via a cable operated cylinder?

 

 

Exactly, check this link: http://www.fastcar.c...ear-line-locks/

[FLD]

That would not be legal for use on the road in the UK.  UK laws require a secondary, mechanical, system which rules out line locks I'm afraid.

Edited by FLD, 21 November 2013 - 02:13 PM.

[Mattias]

That would not be legal for use on the road in the UK.  UK laws require a secondary, mechanical, system which rules out line locks I'm afraid.

 

That's bad news, do you have a link or the name of that legal demand? I might be able to look in to that demand here at work, I work as an engineer at Volvo cars so I should be able to find out some more about it.

[Zoobeef]

http://www.motuk.co.uk/manual_310.htm