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> Brakes, Brakes, Brakes, Experiences with 320i upgrade
djsinister702
post May 20 2005, 05:56 PM
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I upgraded my front brake to the 320i ....now it stop on a dime (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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Eric_Shea
post May 20 2005, 07:47 PM
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Bee Jay, DJ... what was the condition of your 914 calipers before you switched?
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TravisNeff
post May 20 2005, 07:55 PM
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I have new metal master pads, rebuilt front calipers, newish rear calipers (I think - still has fresh looking zinc plating under the red paint), new 19mm master cyl and all new rotors. Car does not stop with authority. I have bled it a few times and will do it some more - if the confidence doesn't come in - I am switching pads. Did adjust the venting clearance as well.
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Eric_Shea
post May 20 2005, 10:00 PM
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Pads Trav, Pads...
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Bee Jay
post May 23 2005, 11:26 AM
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The stock calipers were in great shape. I still have them. I was running the stock calipers, solid cross drilled 5-lug rotors with 19mm MC. I changed to the BMW calipers, and the car stops right now. With the t replacing the proportioning valve, the fronts lock up first.
Bee Jay
Here is my car:

http://www.picturetrail.com/gallery/view?p...2754&uid=598455
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crash914
post May 24 2005, 06:32 AM
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Guys.....914 stock brakes are GOOD!!!!

I would go with the larger master cylinder to get a little better feel for modulating.

that said, I have metal hoses(I know), I also used porterfield r4s on all 4 corners....

If you want, I can send you a set of nearly new r4s front pads to try.

I did go to the 320i set up, but I also have a 320i. (FOR SALE CHEAP!!!!)

What I like best is the pedal travel. it gave me more (so more modulating )

I could always lock up all 4 wheels at will. 914 solid rotors need cooling at the track...this is where my problems are. I know that I brake too much. but hauling down from 100+ to around 30 mph in 150' is sure a lot of fun....those 944 turbos sure brake early!

My current set up that I am very happy with is; 320i calipers, stock rotors up front with Hawk HP+. stock rears with porterfield on r4s.

With this set up I need to adjust for a little more rear bias. Once my pads were bedded in I lock up the fronts way before the rears...

Good luck!
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solex
post May 24 2005, 06:59 AM
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I would like to give the RS4's a try how would we work it out? I'm willing to try almost anything at the point.

I order a set of rebuild kits for the front calipers and am considering a 19MM, but again I do not see any leaks and the pedal feels fine.
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crash914
post May 24 2005, 07:01 AM
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Send me a PM with your address....I will send these off tomorrow....herb
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Joe Ricard
post May 24 2005, 09:47 AM
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I have stock calipers and 17mm M/C. Charlesmac can tell you this car stops REAL good. braided lines good fluid gets bled once a month. pads are the key I have no idea what the pads are but they are NOT stock. I did not like the 19mm M/C as it was too hard and took more effort to really stop the car when coming to a tight AX feature. Now I can hammer the pedal and get it whoa'ed up with great confidence. My other co-driver was braking too early because he wasn't aware of the seriously short stopping distance of my teener. He comments were "Holy crap this car stops GOOD"!!!! "I can get really into the gas longer and brake WAY later than the RX8" More confidence and he believes he can get the car into FTD.
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CptTripps
post May 24 2005, 10:53 AM
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I think I'm going to go back to a 17 also...the 19 isn't the 'upgrade' I thought it would be when I bought it...should have read more before I ordered it.
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crash914
post May 25 2005, 08:00 AM
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2 sets of pads are on their way...

The set with the most pad left is I think the porterfields...the ones without much pad I think are Hawks...

Any way, try them and see if they make a difference.

Sand the pads flat first to remove the burnish and then re-burnish them in your car...

do about 5 to 6 stops from 60 mph to 10 mph at high peddle pressure, then let them cool with out applying the brakes, I usually just idle around for 5 minutes.

That should do it...

Oh, as far as payment, just spread the love of the 914....several people here have sent me stuff for free...just do the same when it makes sense...enjoy!
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solex
post May 25 2005, 10:43 AM
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Herb,

You are a gentleman and thank you.

I have been telling everyone of my "car" friends about your offer and this great group of people.

Thank you all and I will update this thread after I do some testing with the pads you are sending.

Regards,
Dan
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solex
post May 30 2005, 11:39 AM
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Update:

I got the pads from Herb (Thanks Herb) installed them and readjusted the venting clearance on the rear calipers. One of the calipers was not adjusted properly. The car stops much better and on occasion I can lock up one of the fronts.

The venting clearance was a problem and after looking at the calipers they will need a rebuild in the near future. In particlular the rear dust covers are ripped.

I am surprised how much pedal effort is needed. I haven't driven a car with not assisted brakes in 5 years.

Thank you all!
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Eric_Shea
post May 30 2005, 11:49 AM
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QUOTE
they will need a rebuild in the near future. In particlular the rear dust covers are ripped.


Do it, or have it done in the "very" near future. With torn dust covers water gets in there and collects on the upper edge of the cylinder just before the seal. The piston seal generally prevents the water from going much further but you know what happens when water and iron meet (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

If you want, I can spread the love with a few new dust covers and clips but... if you're having adjustment problems then it sounds like you might be do for a rebuild. The torn seals have probably allowed some water in.

Here's a picture that shows the cylinder. The upper edge above the seal ring gets rusty.


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Eric_Shea
post May 30 2005, 11:51 AM
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Here's what the rust does to the piston and cylinder.


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Eric_Shea
post May 30 2005, 11:52 AM
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(Have I scared you enough yet? Get some rebuild kits!)

Herb rocks BTW! (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)
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solex
post May 30 2005, 12:22 PM
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Eric,
Thanks for the offer, but I suspect that nothing was done to the rears for quite some time and will probably have you rebuild them, how much to have them rebuilt? Could you also quote on the price to do the fronts if I supply the complete front rebuild kits?

Thanks,
dan
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messix
post May 30 2005, 12:59 PM
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good working brakes are a good thing.


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Eric_Shea
post May 30 2005, 02:07 PM
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QUOTE
how much to have them rebuilt? Could you also quote on the price to do the fronts if I supply the complete front rebuild kits?


$225 Front
$225 Rear
-$30 Kit Credit
$15.40 Shipping (two Priority Mail Boxes)
$435.40 Total

I'll need your cores and kits. You get this back: (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)



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SpecialK
post May 30 2005, 04:42 PM
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Those are friggin' beautiful Eric!! (IMG:http://www.914world.com/bbs2/html/emoticons/wub.gif)
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