Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Master Cylinder, 17 or 19 mm?
BMXerror
post Apr 28 2006, 09:47 PM
Post #1


Senior Member
***

Group: Members
Posts: 1,705
Joined: 8-April 06
From: Hesperia Ca
Member No.: 5,842
Hey guys.... Yet another newbie question spewing from my.... keyboard. (IMG:style_emoticons/default/051103-stupid4.gif) Anyways, I was looking for a master cylinder rebuild kit and I found two for my car (1970 914-4). One was 19mm and the other was 17mm... Pause..




(IMG:style_emoticons/default/spank.gif) (IMG:style_emoticons/default/headbang.gif) (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/screwy.gif) (IMG:style_emoticons/default/wacko.gif) (IMG:style_emoticons/default/boldblue.gif)



While writing this post I found saw something on Pelican, but I'm still confused. They sell 19mm UPGRADE master cylinders. However, they also sell Genuine Porsche 19 rebuild kits... My question is, what master cylinder should my car be, and how do I know? Thanks for putting up with me.
Mark D.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Apr 28 2006, 09:55 PM
Post #2


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Get a brand new 19 mm. 17 mm was stock, but for the price, you can't beat the 19 mm. Bolts right in. While you're in there (famous last words) get a rebuilt pedal cluster from Eric Shea. (IMG:style_emoticons/default/wink.gif)

Another Mark D! (IMG:style_emoticons/default/biggrin.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Apr 28 2006, 10:01 PM
Post #3


914 Idiot
**********

Group: Members
Posts: 14,986
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
17mm was stock, but 19mm was a popular "upgrade". The only way to tell what you've currently got is to look for numbers on the top side of the MC casting. Yes, the side you can't see with the thing installed in the car. Dig out a mirror or two and a flashlight and you may be able to tell.

Or just buy a new MC. Most shops won't rebuild 'em any more; the liability is just too high and the profit is too low.

The only real difference between the 17mm and the 19mm is that you have to press 25% harder to get the same braking effect with the larger one. But the pedal moves 25% less distance. (You're changing your "effective leverage" that way.) The pedal feels harder, but you have to press harder to get the same effect.

Some people like the feel with the 19mm one, some don't.

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Apr 28 2006, 10:03 PM
Post #4


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
Serious question:

What is the advantage of going to the 19mm MC?

I run the 17mm and have fantastic brakes (IMG:style_emoticons/default/confused24.gif)

I can't believe I haven't asked this sooner...


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Apr 28 2006, 10:08 PM
Post #5


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
IMHO, it's only advantage is $.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Apr 28 2006, 10:08 PM
Post #6


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
19mm is usa\ually cheaper....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
BMXerror
post Apr 28 2006, 10:13 PM
Post #7


Senior Member
***

Group: Members
Posts: 1,705
Joined: 8-April 06
From: Hesperia Ca
Member No.: 5,842
The funny thing is that the 219 is $35 cheaper than the 217. I like tight, racey feeling brakes anyway, so I may just do that. I've already got the steal lines that I'll put in at the same time. Thanks for the help. By the way MC, you're the second other Mark D I've run into on this site. A guy name Mark Durnil sold me my shift linkage last week. I guess 'Mark D's just have good taste in cars... (IMG:style_emoticons/default/biggrin.gif) Anyways, thanks for the help. This forum rules because I can post a question and get it answered by three different people quicker than it would've taken to call somebody. (IMG:style_emoticons/default/thumb3d.gif) GTG.
Mark DEE.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914-8
post Apr 28 2006, 10:15 PM
Post #8


Senior Member
***

Group: Members
Posts: 802
Joined: 23-January 06
From: Cal
Member No.: 5,461
Region Association: None
With stock brakes, I much prefer the 17mm.

Yeah, it usually costs more, but I think it's worth it.

The last thing that stock, unassisted 914 brakes is LESS leverage on the pedal and 25% MORE pedal effort required to get the same braking.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Apr 29 2006, 12:15 AM
Post #9


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
I do a ton of squats to build up my brake-pedal-muscles.




(IMG:style_emoticons/default/lol2.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
So.Cal.914
post Apr 29 2006, 12:16 AM
Post #10


"...And it has a front trunk too."
*****

Group: Members
Posts: 6,588
Joined: 15-February 04
From: Low Desert, CA./ Hills of N.J.
Member No.: 1,658
Region Association: None

I like the 19mm, yes it is a firmer peddle and it takes more effort to get the same

responce but I never submarined a passenger before I got the 19mm M/C. You

just have to stomp it harder. (IMG:style_emoticons/default/smoke.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DaveE
post Apr 29 2006, 07:28 AM
Post #11


Newbie
*

Group: Members
Posts: 10
Joined: 27-September 05
From: Bellwood, PA
Member No.: 4,870
The 19mm is a standard 911 part I think so more volume, lower price?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Apr 29 2006, 10:12 AM
Post #12


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Yup, DaveE.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
BMXerror
post Apr 29 2006, 10:44 AM
Post #13


Senior Member
***

Group: Members
Posts: 1,705
Joined: 8-April 06
From: Hesperia Ca
Member No.: 5,842
Thanks for all the info and perspective guys. I got a 19mm from AZbill last night that's new; still in the box. He sold it me for only $175, so I'm set now. I should be going to 5-lug and 911 brakes eventually anyways, so 19mm probably the right way to go for the long run. We'll find out I guess. I'll shut up now. (IMG:style_emoticons/default/dead horse.gif)
Mark D.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 19th May 2024 - 08:51 AM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...