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4 Pot Upgrade


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#21 siztenboots

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Posted 26 July 2018 - 11:24 AM

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.



#22 Ivor

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Posted 26 July 2018 - 06:37 PM

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.

Or alter seat position to maximise leg leverage and pressure on the pedal

#23 hughcam

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Posted 03 August 2018 - 10:54 AM

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. 



#24 FLD

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Posted 03 August 2018 - 11:55 AM

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.

#25 Exmantaa

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Posted 03 August 2018 - 02:15 PM

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. ;-) )



#26 TheRealVXed

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Posted 02 November 2018 - 04:47 PM

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



#27 siztenboots

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Posted 02 November 2018 - 05:29 PM

boxster brakes



#28 Ivor

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Posted 02 November 2018 - 05:34 PM

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

Need to sort the handbrake if you are putting front caliper on rear

#29 Acidpopstar

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Posted 02 November 2018 - 10:40 PM

What fluid have you been using?


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#30 hairy

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Posted 02 November 2018 - 10:59 PM

boxster brakes

 

linky? do you neeed special brackets ?



#31 Ormes

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Posted 03 November 2018 - 09:37 AM

 

boxster brakes

 

linky? do you neeed special brackets ?

 

 

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



#32 siztenboots

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Posted 03 November 2018 - 09:43 AM

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



#33 leevx2.2

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Posted 03 November 2018 - 03:25 PM

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 



#34 kipper

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Posted 03 November 2018 - 05:09 PM

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.






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