# Brake line size question

**URL:** <https://forums.speedlife.net/t/brake-line-size-question/68742>\
**Category:** NYSpeed Automotive\
**Created:** [June 4, 2009, 7:17am UTC](https://forums.speedlife.net/t/brake-line-size-question/68742 "2009-06-04T07:17:12Z")\
**Posts on this page:** 7\
**Page:** 3

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**Author:** ![ultradriver10000](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ultradriver10000/32/7397_2.png) [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)\
**Post date:** [June 4, 2009, 2:42pm UTC](https://forums.speedlife.net/t/brake-line-size-question/68742/41 "2009-06-04T14:42:38Z")

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> [@newman](#):
>
> Yeah, I decided to use the 1/4" lines. We just have so much scrap 1/4" AN stuff that I can’t see spending the 200 bucks or whatever I’d wind up paying for the -3 stuff.

How much -AN stuff? I wouldn’t mind making up a direct port set up. :snky:

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**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\
**Post date:** [June 4, 2009, 3:10pm UTC](https://forums.speedlife.net/t/brake-line-size-question/68742/42 "2009-06-04T15:10:08Z")

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I’m not really worried about forming it so much as I am doing the flare. We have a decent portable flare tool in house. I can always have ferry flare it up for me, too.

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**Author:** ![LXIFLYBY](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lxiflyby/32/7399_2.png) [@LXIFLYBY](https://forums.speedlife.net/u/LXIFLYBY)\
**Post date:** [June 4, 2009, 4:41pm UTC](https://forums.speedlife.net/t/brake-line-size-question/68742/43 "2009-06-04T16:41:28Z")

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> [@newman](#):
>
> One thing that i think you guys are missing…
> 
> I could run 3/16" lines or 3/4" line, the master cylinder is **not going to be required to displace any more fluid**.
> 
> the only difference is the amount of area that the fluid in the line can act upon, radially.

exactly. brake fluid does not compress, therefore the master will not have to displace any more fluid, and there should be no degredation of pedal feel by going to a bigger hardline, the only thing is the flexible brake hoses going to each caliper: smaller WILL get a better pedal feel due to less expansion from the hose from the reduced diameter which has less surface area to expand…

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**Author:** ![juicedz4](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/juicedz4/32/5051_2.png) [@juicedz4](https://forums.speedlife.net/u/juicedz4)\
**Post date:** [June 4, 2009, 5:16pm UTC](https://forums.speedlife.net/t/brake-line-size-question/68742/44 "2009-06-04T17:16:47Z")

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> [@theblue](#):
>
> also: don’t forget to install an in cabin rear hydraulic hand brake AND brake bias adjuster since you’re going all out.

Fixed

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**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\
**Post date:** [June 4, 2009, 6:18pm UTC](https://forums.speedlife.net/t/brake-line-size-question/68742/45 "2009-06-04T18:18:01Z")

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i bought the $49 wilwood valve from summit and have it set to full front (i think its like 70% or something)… never screwed with it once and my car brakes like normal. 🙂

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**Author:** ![JDMSIR](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdmsir/32/7376_2.png) [@JDMSIR](https://forums.speedlife.net/u/JDMSIR)\
**Post date:** [June 4, 2009, 7:13pm UTC](https://forums.speedlife.net/t/brake-line-size-question/68742/46 "2009-06-04T19:13:12Z")

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Go with FREE. Always a nice choice.

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**Author:** ![theblue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/theblue/32/5074_2.png) [@theblue](https://forums.speedlife.net/u/theblue)\
**Post date:** [June 5, 2009, 9:14am UTC](https://forums.speedlife.net/t/brake-line-size-question/68742/47 "2009-06-05T09:14:06Z")

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> [@turbo ls1 ss](#):
>
> i bought the $49 wilwood valve from summit and have it set to full front (i think its like 70% or something)… never screwed with it once and my car brakes like normal. 🙂

that means your not trying hard enough / braking into turns.

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