M caliper, Banjo fittings |
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M caliper, Banjo fittings |
DanT |
Mar 27 2006, 12:17 AM
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#1
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
will they work on a 914-4 front caliper in place of the normal brake hard line fitting?
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eeyore |
Mar 27 2006, 09:59 AM
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#2
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Senior Member Group: Members Posts: 889 Joined: 8-January 04 From: meridian, id Member No.: 1,533 Region Association: None |
It appears that M caliper bolt and banjo fit on a -4 front caliper. It fit up snugly, with no wiggles, nor did the bolt bottom out inside the bolt hole.
I don't know if the mounting face of the caliper where the banjo goes is flat enough to properly seal. |
Eric_Shea |
Mar 27 2006, 10:46 AM
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#3
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Out with it... what the hell are you trying to do? (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
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DanT |
Mar 27 2006, 04:35 PM
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#4
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
I thought you would figure it out Eric.
I am doing the cardinal no...no. I put my 914-4 fronts on the rear. I know, I know....piston sizes and all that. (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) I just did not like the adjusting and all with the 914-4 rears. PITB. My hang up. I like just compressing the pistons and sliding in some new pads....clean simple, quick. Espeically at the track. got spoiled with my 944 turbo and Boxster at the track. I am running M calipers up front with vented rotors and Porterfield R-4Es and basically stock PBRs on the rear with a "T". I am going to give it a try and see how it works. I had a 914-6 with JFZ 4 piston calipers at all 4 corners that worked very well. The Ms and the stockers will give me some front bias....we will see. I still have the stock rears so if it doesn't work out I will go back to the stock rears with competition pads. Nothing ventured nothing gained....sometimes you just have to try it yourself. And maybe screw up or maybe not. I was going to use a banjo fitting to hook up the front calipers to the rear hard lines...but just "readjusted the existing hard lines to work without the banjos. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) |
race914 |
Mar 27 2006, 04:42 PM
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#5
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73 914-4 Group: Members Posts: 1,006 Joined: 31-October 05 From: Nipomo, California (Central Coast) Member No.: 5,027 Region Association: Central California |
Hey Dan,
I think Larry Sharp did the same thing with his 'Sunoco' 914-6 If I remember right, it worked good for him |
DanT |
Mar 27 2006, 04:48 PM
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#6
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
Well then I guess I am on to absolutely nothing that hasn't been done before (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
Talked to Gabe a couple of weeks ago....said he and his partner sold the 914-6. I guess they are both into motorcycles now! Like I said if the balance is off I can either go back to the stocker rears, or I can install an adjustable bias valve. (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif) Got my oil lines today. Will run them sometime this week and then it is ready to go to Sportech for the alignment and a few other goodies. Should be ready for BW with time to spare. |
fiid |
Mar 27 2006, 04:49 PM
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#7
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Turbo Megasquirted Subaru Member Group: Members Posts: 2,827 Joined: 7-April 03 From: San Francisco, CA Member No.: 530 Region Association: Northern California |
Do you have a prop valve?
I'd spend some time in an empty parking lot if I were you making sure they lock up in the right order.... be safe man. |
Aaron Cox |
Mar 27 2006, 04:49 PM
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#8
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) |
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Eric_Shea |
Mar 27 2006, 05:20 PM
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#9
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
After a short phone discussion with one of the weirdos that hangs out on this board, (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) I think I found a way to do away with the rear adjusters... (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) Also... you're putting a piston on there that Porsche didn't use until 1984 (but you know... piston size) (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) I would keep the P-Valve or FOR SURE... get an adjustable one. CIP1 has one for $45 clams that could be mounted in the cockpit. |
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race914 |
Mar 27 2006, 05:27 PM
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#10
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73 914-4 Group: Members Posts: 1,006 Joined: 31-October 05 From: Nipomo, California (Central Coast) Member No.: 5,027 Region Association: Central California |
I know where it went! It will be at Buttonwillow with its new owner for the PCA DE so you can check out the brake setup if still needed by then... |
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DanT |
Mar 27 2006, 05:28 PM
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#11
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
I'm listening (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) |
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DanT |
Mar 27 2006, 05:35 PM
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#12
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
I will be very cautious and slowly build up speed, until I am familiar and comfortable with the new set up. If I need an adjustable prop valve then I will try one. Still have the stock prop valve....sitting on the floor after removal from car.
I just took it out....a few weeks ago, before I decided to try this. (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) |
Eric_Shea |
Mar 27 2006, 05:42 PM
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#13
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Let me know if you want to explore the rears without the adjusters. I think we can make it work. You'd be the Guinea Pig but from the tone of that last post (the one you deleted) ... you can handle it. (IMG:http://www.914world.com/bbs2/html/emoticons/lol3.gif)
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DanT |
Mar 27 2006, 05:58 PM
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#14
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
Thanks Eric...what would we need to do.
yah, I decided that post was a little over the top for me.... I take things very carefully when I make changes to my cars....and don't plan on going out and doing a bonzai run on my local expressway (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif) You don't get as far as I have gone with track and AX driving without developing a healthy dose of reality and care. The deletion of the adjusters sounds very interesting....let me know how we would proceed. |
DanT |
Mar 27 2006, 06:49 PM
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#15
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
Eric,
now that we are on the subject what are the piston sizes for the front and rear of a '84 Carrera vs. M front caliper and 914-4 front caliper. I want to run the ratios. |
Eric_Shea |
Mar 27 2006, 08:17 PM
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#16
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
M Front = 48mm
M Rear = 38mm 914 Front = 43mm 914 Rear = 33mm 914-6 Rear = 38mm Later M Rear = 42mm (this was the first 911 with a P-Valve BTW... (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)) Remove the adjuster mechanism from inside the piston. Leave the adjusters of course (because they have the seals), but, in theory, those should work like regular brakes. |
DanT |
Mar 27 2006, 09:03 PM
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#17
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
Thanks Eric.
I had looked at some old posts and found the sizes. 48v42 and 42v33. .875 and .79 respectively on percentage of piston sizes. 48v33 is .69 I am going to try to off set the ratio by using a very mild street pad on the rear to go with the Porterfields up front on the Ms. Will try this for one day in mid April at BW. If I have issues with this then I will reinstall the stock pvalve. If I don't do that I may just put in an adjustable pvalve and be done with it. I like the 914 fronts on the rear....I guess I am just a glutton for punishment (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) I will report here my observations after my first track day, then you all may be able to say you told me so (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) If I dont like that I may try to find a set of rear M calipers and go with vented rear rotors...although I don't know if I can get 4 lug vented rears...may have to have some redrilled if possible. Have you seen this done Eric, for 4 bolt rears? (IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif) |
DanT |
Mar 27 2006, 10:23 PM
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#18
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
a couple pics of the offending items (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
I hope I can get them to work properly for me. They bolt on so easily and will be much easier to change pads. Attached image(s) |
DanT |
Mar 27 2006, 10:27 PM
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#19
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
and here is the shot of the reason I started this thread. I thought about using a banjo fitting to make the top feed hard line stay top feed. After much thought and discussion with my personal 914 gurus, I decided to massage the existing hard line to become a side feed line. As you can see it works just fine, if you take your time and don't kink the line. (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
Attached image(s) |
Eric_Shea |
Mar 27 2006, 11:19 PM
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#20
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
I doubt it... sounds like you're on the right track with the pads. Rear M's should work as well. I'll bet if you took the spacers out of a rear M they'd bolt right up... no need to redrill the vented rotors. That would be my choice given your current sit-chee-ation. (send me the spacers and bolts when and if you do...) (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) |
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