4 Pot Upgrade

get down the gym and on the leg press , that is the only way you will increase the force acting on the pad for more friction.

get down the gym and on the leg press , that is the only way you will increase the force acting on the pad for more friction.

Brake bias on the standard set up is far from ideal for track use.  Elise/vx220's have far to much front bias for high performance braking on track. More rear bias is welcome however I am not sure how much bias to the rear would be introduced by putting front calipers on the back with no other modifications. 

For what its worth I have never heard anyone who has undertaken the conversion say a bad thing about it. 

Have you considered boring the rear calipers to 38 or 40mm? A guy in the US did it for vipers (same caliper). No fannying about with brackets or multi caliper set ups and you can retain the oem dust seal (just). I've done a couple or pairs and it's certainly feasible. Not fancying making more though. You can go to 42mm or a bit more but this would need a new dust boot.

Ehhh, you did this? I linked to that Viper conversion some years ago, but not much interest. Although they flex a bit, I would love to have stock rear calipers with 38mm (+11%) or maybe 40mm (+23%) pistons!

On track my car with stock calipers (RC6) has too much front bias. Now going for RC6E fronts which should have slightly less friction than normal RC6 compound.

(Pm some details? Have good workshop access. ;-) )

Thanks for all the replies guys resurrecting this thread as having done a lot of research on here and other places, and the death of one of my rear calipers means that I am going for the 4 pot upgrade.  A combination of several driver training training days has massively improved my ability on track over the last year or so, and one of the focal areas has been braking techniques, braking harder and later, cornering faster and then carrying greater velocity than before into the next corner and then braking harder and later and so on, has lead to floppy pedal on track after 3 to 4 laps even on brand new fluid.  Part of this I am sure is due to the dead read caliper sticking and constantly generating heat, but a new pair of those is as much as the upgrade so it's a bit of a no-brainer.

With that being said, I have a shopping list.  Is there anything else I will need to complete this?

 - AP 5000 4 pot front calipers

 - 295mm EP belled discs

 - CL RC6 pads for the 4 pots (already have these in the 2 pots)

 - Goodridge hoses for the 4 pots

 - Adapter bracket for 2 pots on rear

Thanks all.

VXed

boxster brakes

Thanks for all the replies guys resurrecting this thread as having done a lot of research on here and other places, and the death of one of my rear calipers means that I am going for the 4 pot upgrade. A combination of several driver training training days has massively improved my ability on track over the last year or so, and one of the focal areas has been braking techniques, braking harder and later, cornering faster and then carrying greater velocity than before into the next corner and then braking harder and later and so on, has lead to floppy pedal on track after 3 to 4 laps even on brand new fluid. Part of this I am sure is due to the dead read caliper sticking and constantly generating heat, but a new pair of those is as much as the upgrade so it's a bit of a no-brainer.

With that being said, I have a shopping list. Is there anything else I will need to complete this?

- AP 5000 4 pot front calipers
- 295mm EP belled discs
- CL RC6 pads for the 4 pots (already have these in the 2 pots)
- Goodridge hoses for the 4 pots
- Adapter bracket for 2 pots on rear

Thanks all.

VXed

boxster brakes

linky? do you neeed special brackets ?

 

boxster brakes

 

linky? do you neeed special brackets ?

 

I recall this is what nevs done but only on the fronts so far?

http://www.vx220.org...em-on-there-vx/

Thanks for all the replies guys resurrecting this thread as having done a lot of research on here and other places, and the death of one of my rear calipers means that I am going for the 4 pot upgrade.  A combination of several driver training training days has massively improved my ability on track over the last year or so, and one of the focal areas has been braking techniques, braking harder and later, cornering faster and then carrying greater velocity than before into the next corner and then braking harder and later and so on, has lead to floppy pedal on track after 3 to 4 laps even on brand new fluid.  Part of this I am sure is due to the dead read caliper sticking and constantly generating heat, but a new pair of those is as much as the upgrade so it's a bit of a no-brainer.

 

With that being said, I have a shopping list.  Is there anything else I will need to complete this?

 

 - AP 5000 4 pot front calipers

 - 295mm EP belled discs

 - CL RC6 pads for the 4 pots (already have these in the 2 pots)

 - Goodridge hoses for the 4 pots

 - Adapter bracket for 2 pots on rear

 

Thanks all.

 

VXed

i don't think the AP 5000 callipers fit standard uprights i run them but i have gt hubs and they have another set of holes for standard or ap 5000 offset is different 

I've got the AP "Big brake Kit "  designed as an option on the Vx, and indeed there is an adaptor plate that needs to be fitted to the standard uprights to run the kit. However I do run mine with 308 mm disks, so not sure if this is also the case with 295 mm.

I am about to have two pots fitted to the rear ( already have 4 pots on the front ). I have bought the FCR bracket from Seriously Lotus and will be leaving the original calipers in position for the handbrake. I have all the required bits except for the brake hoses and having had a quick look these will need to be about 100mm longer than the OEM. Could someone point me in the right direction ? I see HEL will do custom braided hoses but there are hundreds of different sizes/ fittings and I am easily confused. I think the existing ones have one male and one female fitting. Is that right ? So its where do I get them from and what do I ask for ? Any help would be much appreciated.

So age old question...are 4 pots really night and day better over the originals, decent pads and fluid....?

So age old question...are 4 pots really night and day better over the originals, decent pads and fluid....?

So age old question...are 4 pots really night and day better over the originals, decent pads and fluid....?

I think there are too many variables to answer that question...