Front brakes - 285mm or 300mm
Discussion
Soo, I'm wondering if I should go for the 300mm 4 pot upgrade or the 285mm upgrade?
Any opinions on whether the 285mm 4 pot Wilwood type upgrade would be enuf? (I'm relatively gentle on brakes, they only slow you down after all). I also noticed the 300mm comes as separate disc/ally bells which were nice 'n light.
(I've got 16 inch wheels on the front now BTW so 300mm discs would fit).
Ta.
T/.
Any opinions on whether the 285mm 4 pot Wilwood type upgrade would be enuf? (I'm relatively gentle on brakes, they only slow you down after all). I also noticed the 300mm comes as separate disc/ally bells which were nice 'n light.
(I've got 16 inch wheels on the front now BTW so 300mm discs would fit).
Ta.
T/.
Hi Trefor,
Look at www.hispecmotorsport.co.uk, value for money.
Except that I was told the 300 mm discs would fit.
But they look just great on the car at a much lower cost than the known brands.
I had also had to get the 16" wheels as the front wheels and that was not calculated for (oeeps).
See (wheelspacers (how thick?)) thread in this group.
I am interested in what brand and size of tyres you have in the front and if you have powersteering or not?
Cheers,
Paul
Look at www.hispecmotorsport.co.uk, value for money.
Except that I was told the 300 mm discs would fit.
But they look just great on the car at a much lower cost than the known brands.
I had also had to get the 16" wheels as the front wheels and that was not calculated for (oeeps).
See (wheelspacers (how thick?)) thread in this group.
I am interested in what brand and size of tyres you have in the front and if you have powersteering or not?
Cheers,
Paul
Soo, I'm wondering if I should go for the 300mm 4 pot upgrade or the 285mm upgrade?
Any opinions on whether the 285mm 4 pot Wilwood type upgrade would be enuf? (I'm relatively gentle on brakes, they only slow you down after all). I also noticed the 300mm comes as separate disc/ally bells which were nice 'n light.
(I've got 16 inch wheels on the front now BTW so 300mm discs would fit).
Ta.
T/.
Before you get too far, think about what problems you want to solve. The bigger the change the more work you will have to do to keep the car balanced under heavy and light braking over a range of temperatures. The bigger brake upgrades cost more too. So what problems do you need to solve?
GreenV8S said:
Soo, I'm wondering if I should go for the 300mm 4 pot upgrade or the 285mm upgrade?
Any opinions on whether the 285mm 4 pot Wilwood type upgrade would be enuf? (I'm relatively gentle on brakes, they only slow you down after all). I also noticed the 300mm comes as separate disc/ally bells which were nice 'n light.
(I've got 16 inch wheels on the front now BTW so 300mm discs would fit).
Ta.
T/.
Before you get too far, think about what problems you want to solve. The bigger the change the more work you will have to do to keep the car balanced under heavy and light braking over a range of temperatures. The bigger brake upgrades cost more too. So what problems do you need to solve?
Thanks Peter. I want to:
- Stop the car in a more balanced manner from high speed/under heavy braking, (hopefully giving more braking power for equivalent pedal effort?)
- Prevent track day fade (currently running fresh DOT 5.1 and EBC pads/discs on the front).
- Increase braking power (let's face it, these cars are not exactly overbraked).
Price difference is not a big deal, spend £500-600 or spend £700-800. I'd rather get it right first time round!
My car handles great for std suspension - as commented on by a number of specialists, not just me
. I'd rather do brakes before suspension and I don't want to afford both right now. Ta.
Trefor/.
Hi, I am just about to fit the 300mm front brake upgrade with Wilwood 4 Pots. Rear are full drilled & grooved.
An going to use Green Stuff pads all round, but I prefer the Mintex 1144's. Has anyone run the Wilwood 4 pots on the mintex and what do you think of them?
Cheers,
Colin L
PS: Got the lot for £150.
An going to use Green Stuff pads all round, but I prefer the Mintex 1144's. Has anyone run the Wilwood 4 pots on the mintex and what do you think of them?
Cheers,
Colin L
PS: Got the lot for £150.
300mm and 15 inch wheels are a lottery. Has been known for the calliper and/or the disc to foul. Any balance weights need to be moved as well which can cause a problem.
The griff runabout has last the 520's old brakes: wil wood 4 pots with a 285mm disc. Absolutely excellent. Don't bother with Green stuff. Mintex 1144 is ok but I'm using Ferodo 3466 (DS2000) which have excellent feel and cope with heat better than a space shuttle tile... maybe not a good comparison.
The griff runabout has last the 520's old brakes: wil wood 4 pots with a 285mm disc. Absolutely excellent. Don't bother with Green stuff. Mintex 1144 is ok but I'm using Ferodo 3466 (DS2000) which have excellent feel and cope with heat better than a space shuttle tile... maybe not a good comparison.
Have those of you that have upgraded front brakes to 285mm (or 300mm) with 4 pot callipers noticed an increase in the "nose dive effect"? I appreciate that upgraded suspension would/may sort this out but like Trefor I have standard suspension (that upgrade will be the year after I do the brakes…)
Upgrading both the disc and the calliper, with its larger pad, must shift the balance forward quite significantly. I guess as so many people have done it, it is not a problem but anyone disagree?
Upgrading both the disc and the calliper, with its larger pad, must shift the balance forward quite significantly. I guess as so many people have done it, it is not a problem but anyone disagree?
As standard the brakes balance on the V8S was slightly too far to the back, it got rather tail happy under braking on the limit. I found that 285mm discs (with the original calipers spaced out) moved the balance forward. It actually moved it slightly further forward than the ideal balance, but having a slight forward bias increases the car's stability under braking and I was happy to leave it like that. However, you can definitely overdo this and I would expect 300mm discs and the original calipers to give too much braking at the front, so the car will tend to lock the front wheels too early. This is definitely bad news.
You're talking about changing the calipers too, this means you may be changing the effective piston area which also changes the brake balance. If you do change the calipers, measure the effective piston area. If it is increasing, then you will need to do something to restore the brake balance. If it is staying the same, you should be OK up to about 285mm but beyond that you will need to do something to restore the brake balance.
In any case, once you've got 285mm at the front I suspect that rear brakes are going to be the limiting factor so there's little point doing more at the front unless you also do something about the rear.
You're talking about changing the calipers too, this means you may be changing the effective piston area which also changes the brake balance. If you do change the calipers, measure the effective piston area. If it is increasing, then you will need to do something to restore the brake balance. If it is staying the same, you should be OK up to about 285mm but beyond that you will need to do something to restore the brake balance.
In any case, once you've got 285mm at the front I suspect that rear brakes are going to be the limiting factor so there's little point doing more at the front unless you also do something about the rear.
Sorry, a bit O/T but if you change the brake disc size - therefore INCREASING the braking efficiency, and notify this to your insurance co. as a mod – will they increase the premium as surely the car is SAFER ... or does the mere appication of a mod up the premium regardless ...
Oh, and T/. : 285mm FWIW! Save the sheckles for the suspension
Oh, and T/. : 285mm FWIW! Save the sheckles for the suspension
Sorry, a bit O/T but if you change the brake disc size - therefore INCREASING the braking efficiency, and notify this to your insurance co. as a mod – will they increase the premium as surely the car is SAFER ... or does the mere appication of a mod up the premium regardless ...
Oh, and T/. : 285mm FWIW! Save the sheckles for the suspension
Oh, and T/. : 285mm FWIW! Save the sheckles for the suspension
) Spoke to Tower View today. Am getting Red Dot pads all round. Will try them and if not what I want then go for the DS ones.
I was concerned about the size but if not happy will go for the 285mm. But then I got them so cheap to start with.
Any of you doing Croft. I will be over and am looking forward to testing the brakes out there.
Thanks for the advise,
Colin L
I was concerned about the size but if not happy will go for the 285mm. But then I got them so cheap to start with.
Any of you doing Croft. I will be over and am looking forward to testing the brakes out there.
Thanks for the advise,
Colin L
What's wrong with EBC greens? I've found 'em excellent on my Chimaera for the last year or so. After the first application of the day, they seem to bed in nicely & feel is pretty good.
trefor said:I agree that EBC are not good on a TVR, they do cut the dust down though! (with std calipers in my case). I'll try DS2000s next.
T/.
I have DS2000s on my Subaru - they seem to work reasonably well, but on track I get a fair bit of judder, they put out lots of dust, and don't seem to last that long.
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