19 or 23 bore master cyl? |
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19 or 23 bore master cyl? |
broomhandle |
Jun 18 2012, 02:09 PM
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#1
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Member Group: Members Posts: 290 Joined: 26-June 09 From: Half Moon Bay, CA Member No.: 10,512 Region Association: Northern California |
19 or 23 bore?
I have a 70 with stock brakes. I was thinking 23 but unsure if I have to change anything. I know 19 is a direct fit, just wondering 23. Any thoughts? |
6freak |
Jun 18 2012, 02:23 PM
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#2
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MR.C Group: Members Posts: 4,740 Joined: 19-March 08 From: Tacoma WA Member No.: 8,829 Region Association: Pacific Northwest |
why spend the money... car`s not fast enough to require more brakes..if there working proper there all you need ..JMO
(IMG:style_emoticons/default/smile.gif) |
yeahmag |
Jun 18 2012, 02:30 PM
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#3
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Advanced Member Group: Members Posts: 2,435 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
Stock brakes = stock MC
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SirAndy |
Jun 18 2012, 02:31 PM
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#4
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Resident German Group: Admin Posts: 41,815 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
19 or 23 bore? I have a 70 with stock brakes. I was thinking 23 but unsure if I have to change anything. I know 19 is a direct fit, just wondering 23. Any thoughts? You will *not* be happy with stock brakes and a 23mm MC. The 19mm is the better choice over the 23mm and the stock 17mm would be even better yet. (IMG:style_emoticons/default/popcorn[1].gif) |
Eric_Shea |
Jun 18 2012, 02:49 PM
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#5
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PMB Performance Group: Admin Posts: 19,289 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
19. I would never put a 23 on stock brakes.
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broomhandle |
Jun 18 2012, 03:04 PM
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#6
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Member Group: Members Posts: 290 Joined: 26-June 09 From: Half Moon Bay, CA Member No.: 10,512 Region Association: Northern California |
23, 19 and 17 are the same price. Everybody always talks about a 19.
So then 19 vs 17? It's only 2mm... I would think that much bigger bore would help. |
a914622 |
Jun 18 2012, 03:46 PM
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#7
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Member Group: Members Posts: 316 Joined: 12-August 10 From: northwest Member No.: 12,048 Region Association: Pacific Northwest |
Ya but when you talk bores and fluids half again bigger = 4 times the flow rate. So a 1.5 dia will flow 4 times the rate of a 1.0 dia. Go 2mm bigger on a 17mm and the flow rate is noticable.
so i would stay with a 19mm jcl |
yeahmag |
Jun 18 2012, 03:49 PM
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#8
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Advanced Member Group: Members Posts: 2,435 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
You are thinking about this backwards. The smaller bore makes it easier to apply the brakes at the expense of pedal travel. Going up to a 19mm bore will make the brakes "feel harder", but also makes it so you have to push harder to stop. At 23mm with stock brakes you would be hating life and having to push like a formula car to get the thing to stop.
23, 19 and 17 are the same price. Everybody always talks about a 19. So then 19 vs 17? It's only 2mm... I would think that much bigger bore would help. |
SirAndy |
Jun 18 2012, 03:50 PM
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#9
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Resident German Group: Admin Posts: 41,815 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
I would think that much bigger bore would help. Help with what exactly? (IMG:style_emoticons/default/confused24.gif) |
yeahmag |
Jun 18 2012, 03:51 PM
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#10
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Advanced Member Group: Members Posts: 2,435 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
"Help" going through the first stop sign after installing it...
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mepstein |
Jun 18 2012, 03:52 PM
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#11
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914-6 GT in waiting Group: Members Posts: 19,518 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Think of a lever. The bigger mc is like having the fulcrum close to you. You move more fluid but it takes more effort. Push the fulcrum away from you and you have more travel but the effort is reduced at your end and multiplied at the far end.
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ChrisFoley |
Jun 18 2012, 04:12 PM
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#12
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I am Tangerine Racing Group: Members Posts: 7,958 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
I would like an 18mm M/C for stock brakes.
The 17mm has a little too much pedal travel and the 19mm has a little too much pedal effort. |
yeahmag |
Jun 18 2012, 04:34 PM
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#13
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Advanced Member Group: Members Posts: 2,435 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
Did they ever make one? Reason I ask is I swear mine is marked "18" on the outside.
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euro911 |
Jun 18 2012, 04:42 PM
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#14
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,855 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California |
If you can get a 17mm ATE for the same price as a 19mm, I'd jump on it.
Not sure about FTE's quality yet (IMG:style_emoticons/default/confused24.gif) |
Valy |
Jun 18 2012, 04:54 PM
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#15
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Senior Member Group: Members Posts: 1,677 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
17mm is perfect for the stock brakes.
The 19mm requires 25% more leg force to stop like the 17mm stops. |
mrbubblehead |
Jun 18 2012, 05:32 PM
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#16
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Twodollardoug Group: Members Posts: 1,155 Joined: 17-December 10 From: calimesa ca. Member No.: 12,492 Region Association: Southern California |
its to bad there arnt rebuild kits available....
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ArtechnikA |
Jun 18 2012, 05:43 PM
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#17
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
Interesting fact - all MC's are really SAE sizes.
What we call "19mm" is really 3/4" "17 mm" is 11/16" And they go up and down in 1/16" imcrements. Which is why there is no 18mm... |
markb |
Jun 18 2012, 05:53 PM
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#18
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914less :( Group: Members Posts: 5,449 Joined: 22-January 03 From: Nipomo, CA Member No.: 180 Region Association: Central California |
17mm is perfect for the stock brakes. The 19mm requires 25% more leg force to stop like the 17mm stops. (IMG:style_emoticons/default/agree.gif) |
yeahmag |
Jun 18 2012, 05:56 PM
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#19
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Advanced Member Group: Members Posts: 2,435 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
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broomhandle |
Jun 18 2012, 06:31 PM
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#20
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Member Group: Members Posts: 290 Joined: 26-June 09 From: Half Moon Bay, CA Member No.: 10,512 Region Association: Northern California |
You are thinking about this backwards. The smaller bore makes it easier to apply the brakes at the expense of pedal travel. Going up to a 19mm bore will make the brakes "feel harder", but also makes it so you have to push harder to stop. At 23mm with stock brakes you would be hating life and having to push like a formula car to get the thing to stop. 23, 19 and 17 are the same price. Everybody always talks about a 19. So then 19 vs 17? It's only 2mm... I would think that much bigger bore would help. That makes sense. The brakes feel good. The MS just leaks... Bad. I remember awhile ago everybody was saying go 19mm and 320 brakes.... But I think a new rebuilt 17 would be just fine. It's a daily driver. But I do like really sensitive brakes..... |
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