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broomhandle |
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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 |
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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
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yeahmag |
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#3
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,424 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California ![]() ![]() |
Stock brakes = stock MC
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SirAndy |
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#4
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Resident German ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 41,707 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 |
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#5
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PMB Performance ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 19,279 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 |
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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 |
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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 |
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#8
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,424 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 |
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#9
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Resident German ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 41,707 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 |
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#10
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,424 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 |
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#11
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914-6 GT in waiting ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 19,334 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 |
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#12
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I am Tangerine Racing ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 7,937 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 |
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#13
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,424 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 |
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#14
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Retired & living the dream. God help me if I wake up! ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 8,851 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 |
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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 |
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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 |
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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 |
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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 |
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#19
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,424 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California ![]() ![]() |
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broomhandle |
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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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