coyoteboy
|
| posted on 10/10/13 at 12:28 PM |
|
|
Disc diameter is one of the key drivers of the apparent braking force - how do everyones rotor sizes compare - that would be my first question. Given
the same piston areas all the calipers should give roughly the same stopping results, give or take a few percent. The difference will come when you
change the torque they can provide. This will increase stopping force available but increase the likelihood of fade. IF you're nowhere near a
fade limit, just up the rotor diam?
|
|
|
|
|
loggyboy
|
| posted on 10/10/13 at 12:57 PM |
|
|
quote:
Originally posted by coyoteboy
Disc diameter is one of the key drivers of the apparent braking force - how do everyones rotor sizes compare - that would be my first question. Given
the same piston areas all the calipers should give roughly the same stopping results, give or take a few percent. The difference will come when you
change the torque they can provide. This will increase stopping force available but increase the likelihood of fade. If you're nowhere near a
fade limit, just up the rotor diam?
Surely a larger disc would also disipate heat quicker so balance out the increased forces applied?
Mistral Motorsport
|
|
|
pekwah1
|
| posted on 10/10/13 at 02:31 PM |
|
|
if you can find Carbotech brake pads for your calipers, they're supposed to be amazing!!
Not half expensive though....
|
|
|
PhillipM
|
| posted on 10/10/13 at 03:24 PM |
|
|
They are, XP8's blow anything Wilwood offers away. The Wilwood compounds are pretty old though, so to be expected.
Powerlites are fine on lighter cars, anything much over the 700kg mark and you should be switching up to Midilites though, that's generally
where all these rumours of excessive flex come from - people running the smallest, cheapest caliper on cars much heavier than they were designed for.
|
|
|
unijacko67
|
| posted on 10/10/13 at 04:12 PM |
|
|
I had the Ferodo 2500 (FRP3108H) in at Blyton ppc day and although I wasn't as fast as you chaps I did have a tad more weight to stop and
didn't have any brake fade issues. I cant compare as I haven't used any other types, but seem to stop ok.
http://www.kittenkitcar.co.uk
|
|
|
Neadles
|
| posted on 12/10/13 at 06:46 AM |
|
|
I have HI Spec calipers with green stuff pads and solid disc, as this is how I bought it and after my first year with the car on track there not great
at all. I thinking mainly because i have never rated the EBC pads, but they do flex I thinkink as I have about 1.5-2 mm pad thickness defference
accross them as I have been warned by a few people this might happen. I like to brake hard and late and its just not doing it for me and at Blyton I
have cooked the brakes everytime which is what dictates my sessions length. So the seup will be changing! I've always been a fan of AP with
Dixcel carbon pads but don't think they would cost effective.
I am thinking of Powerlights with 1144 pads.
Rob if you want to try try my calipers as my car is away for the winter let me know. (I have Mk2 escort uprights which I beleve are the same as
cortina ones?)
|
|
|
laptoprob
|
| posted on 12/10/13 at 08:15 AM |
|
|
quote:
Originally posted by Neadles
I have HI Spec calipers with green stuff pads and solid disc, as this is how I bought it and after my first year with the car on track there not great
at all. I thinking mainly because i have never rated the EBC pads, but they do flex I thinkink as I have about 1.5-2 mm pad thickness defference
accross them as I have been warned by a few people this might happen. I like to brake hard and late and its just not doing it for me and at Blyton I
have cooked the brakes everytime which is what dictates my sessions length. So the seup will be changing! I've always been a fan of AP with
Dixcel carbon pads but don't think they would cost effective.
I am thinking of Powerlights with 1144 pads.
Rob if you want to try try my calipers as my car is away for the winter let me know. (I have Mk2 escort uprights which I beleve are the same as
cortina ones?)
Thats a very kind offer mate but ive decided to go Polymatrix A race pads for next weeks visit to Oulton and test the water.(literally if its
raining).
If they perform ok i may stick with the Powerlites short term in view of changing to Midilites with solid disc.
I like AP too but dont have AP money 
http://www.youtube.com/watch?v=ajlF4nWJtGA
|
|
|
StevieB
|
| posted on 12/10/13 at 08:29 AM |
|
|
quote:
Originally posted by laptoprob
Hi all,
wondered if anyone can help on my brake upgrade quandry?
Im running Powerlites at present on Cortina uprights which was an upgrade from my std M16's running green stuff. If im honest i hardly felt any
difference.
Im now in the market to upgrade again.
My car has 262bhp, weighs around 590kgs and spend 80% of my time on track.
My first port of call is the Midilites with disc upgrade to possibly the vented version but have been warned they are heavy discs abd will have an
small adverse effect on brake performance.
So do i go with Midilites or are the HiSpec units any better and do i stick with solids or go vented?
My budget is 4-5 hundred quid by the way before anyone gets carried away
[Edited on 9/10/13 by laptoprob]
[Edited on 9/10/13 by laptoprob]
Do you have a bias valve to play with? Might be worth giving one a go before abondoning the powerlites and putting a load more money in (but give me a
shout if you do because I want some on my westfield  )
If you can adjus the bias, you might find a better balance that suits your needs rather than forking out a heap of money to then possibly have a
similar problem.
|
|
|
jeffw
|
| posted on 12/10/13 at 09:12 AM |
|
|
quote:
Originally posted by Neadles
I have HI Spec calipers with green stuff pads and solid disc, as this is how I bought it and after my first year with the car on track there not great
at all. I thinking mainly because i have never rated the EBC pads, but they do flex I thinkink as I have about 1.5-2 mm pad thickness defference
accross them as I have been warned by a few people this might happen. I like to brake hard and late and its just not doing it for me and at Blyton I
have cooked the brakes everytime which is what dictates my sessions length. So the seup will be changing! I've always been a fan of AP with
Dixcel carbon pads but don't think they would cost effective.
I am thinking of Powerlights with 1144 pads.
Rob if you want to try try my calipers as my car is away for the winter let me know. (I have Mk2 escort uprights which I beleve are the same as
cortina ones?)
The reason for your cooked brakes is a lack of cooling. Remember brakes will run hotter in a Fury/Phoenix than a Seven so you either have to run
cooling ducts or vented discs. The BEC Furys get away with it due to low weight but a CEC enclosed car needs the next brakes up...
|
|
|
Neadles
|
| posted on 12/10/13 at 11:20 AM |
|
|
quote:
Originally posted by jeffw
The reason for your cooked brakes is a lack of cooling. Remember brakes will run hotter in a Fury/Phoenix than a Seven so you either have to run
cooling ducts or vented discs. The BEC Furys get away with it due to low weight but a CEC enclosed car needs the next brakes up...
I appreciate that Jeff, but it is a Furyblade so is light, the bite is not great and I cannot break as late as most. i thought about over heating and
ducting but I'm still not happy with the feel of the brakes. The MC's are right and the balance bar seems to be just about right.
|
|
|
laptoprob
|
| posted on 12/10/13 at 12:14 PM |
|
|
quote:
Originally posted by StevieB
quote:
Originally posted by laptoprob
Hi all,
wondered if anyone can help on my brake upgrade quandry?
Im running Powerlites at present on Cortina uprights which was an upgrade from my std M16's running green stuff. If im honest i hardly felt any
difference.
Im now in the market to upgrade again.
My car has 262bhp, weighs around 590kgs and spend 80% of my time on track.
My first port of call is the Midilites with disc upgrade to possibly the vented version but have been warned they are heavy discs abd will have an
small adverse effect on brake performance.
So do i go with Midilites or are the HiSpec units any better and do i stick with solids or go vented?
My budget is 4-5 hundred quid by the way before anyone gets carried away
[Edited on 9/10/13 by laptoprob]
[Edited on 9/10/13 by laptoprob]
Do you have a bias valve to play with? Might be worth giving one a go before abondoning the powerlites and putting a load more money in (but give me a
shout if you do because I want some on my westfield )
If you can adjus the bias, you might find a better balance that suits your needs rather than forking out a heap of money to then possibly have a
similar problem.
I did think about the fact i may have needed a bias in there but the brakes hardly ever lock up to be fair so i think it about right anyway. It may
lock an inside wheel when braking downhill at speed but that pretty normal with weight tranfer etc.
Ill keep you posted on the Powerlite Steve if i decide to let them go
http://www.youtube.com/watch?v=ajlF4nWJtGA
|
|
|
PhillipM
|
| posted on 12/10/13 at 01:02 PM |
|
|
Bin the Greenstuffs.
We have Hispecs on the rear of the racer and have no issues with caliper flex, the pads wear absolutely square even down to a shadow on the backing
plate. Might be worth checking they're mounted perfectly square to the discs.
|
|
|
