Brakes

Make it go fast! Kick it up a notch. Post tips in here.
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engineerted
Posts: 531
Joined: Tue Feb 21, 2006 9:57 pm
Your car is a: 1974 124 spider
Location: Farmington Hills, MI

Re: Brakes

Post by engineerted »

Force = Area x Pressure

So yes, it is the area of the piston or pistons. Volume = the area x the distance traveled, thus the volume of fluid expelled from the MC must equal the volume of the caliper as it moves. (The assumption is that brake fluid is incompressible)
So if you increase the dia (area of the caliper), keeping the stock MC you will increase the braking force at the expense of pedal travel. You got it now? :idea:

Ted
Ted
1978 124 Spider, Complete Restoration
1974 Fiat 124 F Production Race car
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maytag
Posts: 1789
Joined: Mon Oct 19, 2009 9:22 pm
Your car is a: 1976 124 spider
Location: Rocky Mountains....UTAH! (Not Colorado)

Re: Brakes

Post by maytag »

engineerted wrote:Force = Area x Pressure

So yes, it is the area of the piston or pistons. Volume = the area x the distance traveled, thus the volume of fluid expelled from the MC must equal the volume of the caliper as it moves. (The assumption is that brake fluid is incompressible)
So if you increase the dia (area of the caliper), keeping the stock MC you will increase the braking force at the expense of pedal travel. You got it now? :idea:

Ted
CHA! :D

thank you!

so what sort of brake setup are YOU running?
I'm no Boy-Racer..... but if I can't take every on-ramp at TWICE the posted limit.... I'm a total failure!
weekend warrior
Posts: 95
Joined: Sat May 27, 2006 11:39 pm
Location: Sydney Australia

Re: Brakes

Post by weekend warrior »

I've found this set up works well, i originally saw it on the fire breathing fiats site. It is 285mm vented discs with 6 pot calipers, i also have 5/8' spacers from millers mule 15' volumex rims and a volumex booster/master. It hauls up real quick!!

http://www.flickr.com/photos/61432614@N ... 989002922/
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maytag
Posts: 1789
Joined: Mon Oct 19, 2009 9:22 pm
Your car is a: 1976 124 spider
Location: Rocky Mountains....UTAH! (Not Colorado)

Re: Brakes

Post by maytag »

weekend warrior wrote:I've found this set up works well, i originally saw it on the fire breathing fiats site. It is 285mm vented discs with 6 pot calipers, i also have 5/8' spacers from millers mule 15' volumex rims and a volumex booster/master. It hauls up real quick!!

http://www.flickr.com/photos/61432614@N ... 989002922/
where did you source the rotors & calipers?
I'm no Boy-Racer..... but if I can't take every on-ramp at TWICE the posted limit.... I'm a total failure!
weekend warrior
Posts: 95
Joined: Sat May 27, 2006 11:39 pm
Location: Sydney Australia

Re: Brakes

Post by weekend warrior »

I got them direct, they sent the wrong brackets which i then had to develop for them, we machined a prototype and then sent them a cad file and got nicely machined aluminium ones sent from Milan. I couldn't believe an italian brake co didn't have stock brackets for an italian car!

http://en.tarox.com/
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boogiedude
Posts: 410
Joined: Mon Mar 02, 2009 5:22 am
Your car is a: 1978 spider 1800
Location: Honolulu, HI

Re: Brakes

Post by boogiedude »

weekend warrior wrote:I got them direct, they sent the wrong brackets which i then had to develop for them, we machined a prototype and then sent them a cad file and got nicely machined aluminium ones sent from Milan. I couldn't believe an italian brake co didn't have stock brackets for an italian car!

http://en.tarox.com/
What did it cost, if you dont mind my asking? I have a wilwood setup that works very well but it squeals and nothing that I've been able to do has been able to stop it. At the point of looking for a different setup
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maytag
Posts: 1789
Joined: Mon Oct 19, 2009 9:22 pm
Your car is a: 1976 124 spider
Location: Rocky Mountains....UTAH! (Not Colorado)

Re: Brakes

Post by maytag »

boogiedude wrote:
What did it cost, if you dont mind my asking? I have a wilwood setup that works very well but it squeals and nothing that I've been able to do has been able to stop it. At the point of looking for a different setup
Sell me your wilwood setup?
I'm no Boy-Racer..... but if I can't take every on-ramp at TWICE the posted limit.... I'm a total failure!
WYSpider

Re: Brakes

Post by WYSpider »

boogiedude wrote:I have a wilwood setup that works very well but it squeals and nothing that I've been able to do has been able to stop it. At the point of looking for a different setup
Greasing the pad springs works for me.
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boogiedude
Posts: 410
Joined: Mon Mar 02, 2009 5:22 am
Your car is a: 1978 spider 1800
Location: Honolulu, HI

Re: Brakes

Post by boogiedude »

I've tried every off the shelf grease, anti squeal compound, cleaner, etc I can buy. Applied it on every surface possible in every combination possible, nothing has stopped it. The squealing happens at two different temperature ranges. The first being when it is nice and cold out and the car is being driven for the first time in 12+ hours, it'll squeal for the first 2-3 stops coming out of my street, and then stop for awhile. Then once the pads reach true operating temperature, after about 30 minutes of stop&go traffic or a few stops from moderate speed on an decline. This is the most annoying stage of squeaking because it'll keep doing it until the brakes cool down significantly or get significantly hotter, which doesn't usually happen until I reach whatever destination I'm going to.

I've also bought the wilwood anti vibration shims as suggested by a few other members in the past, and while they made the squealing happen a little bit less, it definitely didn't solve the problem
maytag wrote:
boogiedude wrote:
What did it cost, if you dont mind my asking? I have a wilwood setup that works very well but it squeals and nothing that I've been able to do has been able to stop it. At the point of looking for a different setup
Sell me your wilwood setup?
I'll sell it to you if and when I get another setup :lol:
WYSpider

Re: Brakes

Post by WYSpider »

Which Wilwood pads are you using? BP-10 or the Polymatrix-Q?
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boogiedude
Posts: 410
Joined: Mon Mar 02, 2009 5:22 am
Your car is a: 1978 spider 1800
Location: Honolulu, HI

Re: Brakes

Post by boogiedude »

polymatrix-Q I believe. Touted by wilwood as "featuring the lowest noise and dust properties available from a performance compound pad."
spiderrey
Posts: 2623
Joined: Sat Jan 28, 2006 2:08 pm
Your car is a: 70 124 spider-74x19-03 ranger edge
Location: San Dimas, Ca

Re: Brakes

Post by spiderrey »

I went to the tarox site and couldnt find any info on the setup.
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maytag
Posts: 1789
Joined: Mon Oct 19, 2009 9:22 pm
Your car is a: 1976 124 spider
Location: Rocky Mountains....UTAH! (Not Colorado)

Re: Brakes

Post by maytag »

spiderrey wrote:I went to the tarox site and couldnt find any info on the setup.
Same here. from there, I had to assume it was re-inventing the wheel AGAIN...... which sounds expensive. If Tarox has all of the information left over from the last time, and can produce it again, then that'd be great. But then why haven't they listed it on their site with all the other Fiat kits?
I'm no Boy-Racer..... but if I can't take every on-ramp at TWICE the posted limit.... I'm a total failure!
weekend warrior
Posts: 95
Joined: Sat May 27, 2006 11:39 pm
Location: Sydney Australia

Re: Brakes

Post by weekend warrior »

spiderrey wrote:I went to the tarox site and couldnt find any info on the setup.
You will have to email them, i bought last year 285mm discs with 6 pot callipers, its all available. It appears the fire breathing fiats website is no longer available which had lots of info and photos on this set up. Make sure you ask about the custom brackets they sent to Australia.
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manoa matt
Posts: 3442
Joined: Thu Oct 26, 2006 4:28 pm
Your car is a: 1978 Fiat 124 Spider 1800
Location: Honolulu, Hawaii

Re: Brakes

Post by manoa matt »

I couldn't be happier with my big brake setup from Classicricambi.com. It uses 240mm diameter vented rotors that are drilled and slotted. The calipers are of the sliding pin design, same as the 1985.5 Pininfarinas and use the same brake pads.

The caliper piston is the same diameter as the stock fiat calipers one so the same caliper rebuild kits work, and it produces the same pedal feel. The extra braking torque comes from the caliper being spaced out further away from the hub. Pads are cheap, less than $40 a set and are available in a wide range of compounds from generic to Ferodo to EBC. The 13" kit will also fit under 13" alloy rims.
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