39 replies to this topic

[cookster501]

Standard size is 23.8

[Exmantaa]

Was it not a Mazda 7/8th master that people used for the bigger brake calipers?

 

see => http://www.midlandsl...-modding-again/

 

 

 

ps; Scuffers probably thinks your standard brakes are fine if you just fit decent pads.

[Exmantaa]

just read that link and maybe the Mazda cilinder is used for a non-servo brake set-up, as it's a 7/8th...

[cookster501]

Nitron racings exige project n2 400bhp 6pots up front and 4pots on the rear that's well over braked according to some members when all you have to do is upgrade the pads on the standard setup

[FLD]

With good wheels that should be possible but there is not to many to choose beetween to vx220s

 

TD's on the nitron project car I think.

https://nitronracing...egory/brakes-2/

 

Plenty to tempt you on their blog.  The only downside is those front calipers aren't dust sealed (not sure about pad options either)

[Scuffers]

Nitron racings exige project n2 400bhp 6pots up front and 4pots on the rear that's well over braked according to some members when all you have to do is upgrade the pads on the standard setup

exactly.

 

std callipers are fine, first weak point is the disks themselves, and that's about the disk more than the size per say.

 

only real advantage of 4 pots is the use of bigger pads, giving more stable pad temps and longer life, that said I have done 24Hour races on std callipers and made the pads last (actually changed the fronts at 14 hours but they were far from worn out, just did not want to run the risk of them giving out in the last hour).

 

Disk wise, Jamie's TA car with some 5 times the power of a VX runs 304mm disks all round no problem, as have many endurance race cars.

[cookster501]

there small brakes for a 800bhp car what is it?

[Aerodynamic]

Still need the bigger brakes for SFRO no matte how good OEM is.

[Scuffers]

And what's that mean in English

[techieboy]

And what's that mean in English

It's some kind of crazy ass Swedish MOT test (may be more like the SVA test) that appears to mandate a minimum level of craziness that the Swedes have to comply with in order to pass the SFRO test for rebuilt cars.    

Hi Everyone, I´m looking to do a get my car SFRO inspected during the spring. (SFRO is a independet kind of MOT here in sweden that approves newbuilt or rebuilt vehicals) Anyone to get my car approved I need to do 2 of each other  independent major upgrades, means power train is one (engine and gerarbox), chassis is one, brake system is one and suspension is one.   I also want to put in least  amont of money and hours. since I have 2 kids and spent to many hours the last 5 years renovating the house and fixed my car.   Power train is alread done.   So I have looked into changing the spindles but this isn´t enought I need to make new control arms with new suspension geometry.   Chassi could be one where I have thought about elongating the car with about 10cm and tilt the engine forward. To get a less nervous car wth more weight over front. But this seems to need a lot of hours.   So I´m quite satisfied with my brakes today but this is also an option here the criteria is, increase disc area with atleast 20% and pad area with 20% or instead of pad area upgrade caliper to a caliper with more pistons.   If I go for brakes the front seems rather easy. I found discs at Reyland.co.uk in size 315*28 since I want to go for 16" front wheels. I´d prefer a 25mm brake disc but I think 28 should be OK. This with a Wilwood Dynalite front caliper. With these calipers you can vary the size of the pistons.   But rear seems harder, my idea was to fit front caliper in rear and keeping the caliper I have today but this seems like a heavy solution and I don´t know how to space oem calipers out for a bigger disc?   It could also be necessary to change for a new master brake cylinder. I have red that Subaru have someone that fit. From which Subaru and how much bigger is this master valve, thinking of recalculate front pistons size.

It does explain how/why some of those crazy Swedish car conversions exist and what goes on during the long cold dark nights of Winter though.

[Aerodynamic]

Techieboy i summarising it pretty good.

 

Anyony knows the diameter of the std piston for rear caliper? I  red somewhere a diameer about 36mm?!

 

And those who have the std front caliper mount to the rear Wheels, how does this affect the brake balance or

are you using a bias valve?

 

Would this be a problem with the ABS system since I´d like to keep it.

 

Thanx

Per

 

 

 

[Exmantaa]

Some German guys run with also the 2 pots on the rear, but they had to play with bigger discs up front and different pad material F- R. And you probably need the ABS rear proportioning valve activated to prevent possible overbraking at the rear.

 

Eliseparts also do a 2 pot AP with smaller pistons, so the distribution is better. (std front = 44mm, they can do the AP's in 41mm and possible 36 or 38mm. Ask EP)

[Aerodynamic]

Well if I going to buy new calipers for rear I think I go for hispec with integrated parking brake. But Id like to know what Oem have to know what to calculate with. Br, Per

[Tonie Pettersson]

A quick search for you http://www.vx220.org...iston-diameter/

blame FLD if it isn´t correct

[Aerodynamic]

Yhea I think I found this too. Can someone confirm the rear piston is Ø36mm?

 

Br, Per

[Aerodynamic]

Looking at Hi-spec parking brake caliper and see you can choose ratio.

Anyone know which ration std VX220 caliper have?

 

Br, Per

[Scuffers]

Yhea I think I found this too. Can someone confirm the rear piston is Ø36mm?   Br, Per

 It is...  

Looking at Hi-spec parking brake caliper and see you can choose ratio. Anyone know which ration std VX220 caliper have?   Br, Per

Eh? Ratio for what?

[siztenboots]

is there no EU type approval for VX or Lotus elise in Sweden?

[Aerodynamic]

is there no EU type approval for VX or Lotus elise in Sweden?

Yes it is. Why? This disapears once you have done SFRO MOT. Br, Per

[Aerodynamic]

Yhea I think I found this too. Can someone confirm the rear piston is Ø36mm?   Br, Per

 It is...  

Looking at Hi-spec parking brake caliper and see you can choose ratio. Anyone know which ration std VX220 caliper have?   Br, Per

Eh? Ratio for what?

Probably mm pulling the wire vs piston movement in mm. Br, Per