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03-31-2018, 05:40 PM | #1 |
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Anti knock back springs
Most aftermarket bbk come with these installed and I thought the stoptech trophies did as well but I guess not.
Anyone have experience with purchasing these from somewhere. I've seen some at AP Racing for sale but which springs do you buy? 4/6/9/12 lbs? Just want the lowest spring rate needed to combat excessive piston retraction. TIA
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03-31-2018, 08:59 PM | #2 |
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Is it something you can just add? I would think the pistons would have some kind of retainer for the spring...
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03-31-2018, 09:26 PM | #3 |
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https://www.zeckhausen.com/catalog/i...th=24_217_7351
You will need compressed air to push the pistons out so you do not risk scoring the pistons I have not done this yet as I have not had an issue with pad knockback yet with my trophy kit |
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03-31-2018, 10:01 PM | #4 | |
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03-31-2018, 10:49 PM | #5 |
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Selll that ish and step up.
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04-01-2018, 12:44 PM | #6 |
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All I need are the springs. Otherwise with the endless pads braking was excellent.
No fade, no drop in performance even as it was doing this lol https://instagram.com/p/Bg9dIhVBizb/
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04-01-2018, 03:58 PM | #7 |
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According to Tito, ap Racing uses 4lb springs. I'll start there.
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04-01-2018, 06:23 PM | #8 |
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04-02-2018, 12:22 AM | #9 | |
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04-02-2018, 08:30 AM | #10 | |
Stop the hate, get a V8
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Hah, that's happened to me before, too -- if your cooldown is too short, you can definitely pull in with smoking brakes!
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04-02-2018, 09:58 AM | #11 |
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Going with stoptech 4lbs Springs. Strange they sell their own. Just have them installed!!
Another option is the full floating hardware but there is so much chatter.
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04-02-2018, 06:37 PM | #12 |
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I've installed knockback springs in all of my stoptech kits and haven't noticed any downsides.
Note, you can use competitors springs and save some money over the stoptechs. Shop around. |
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04-02-2018, 08:48 PM | #13 |
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i've also had a piece of rubber slag fall from the inside of the barrel onto/into the rotor/veins. lots of smoke!
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04-02-2018, 11:51 PM | #14 | |
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What rates did you go with? Did installing them alleviate knockback? Do I need to buy new seals when I install these?
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04-08-2018, 11:11 PM | #15 | ||
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I'm actually rebuilding my brakes this weekend but unfortunately sidelined because stoptech sent me an incomplete seal kit |
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04-08-2018, 11:48 PM | #16 |
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are those boots i see on the pad side of the pistons? how do the boots secure to the caliper? snap ring or something?
also, did your pistons come with that raised spring retention cutout in the center, or did you have to upgrade your pistons?
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04-09-2018, 02:12 PM | #17 | |
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The dust boots have an internal metal ring that press fits into the caliper. |
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04-09-2018, 04:25 PM | #18 | |
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We'll see how it goes. I'm going to install these today. For the other improvements, I may purchase the full floating (rattling) rotor hardware. Supposedly those help even more. I spoke to David from Zeckhausen and he's a pretty cool dude. Even called me when he saw my order because he thought I bought way too many parts for one car but I told him it was for two cars.
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04-09-2018, 04:43 PM | #19 | ||
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I left foot tap on the brakes before big corners now by nature and have no issues. |
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04-09-2018, 08:45 PM | #20 |
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i'm running my rear brakes without pad retainers and the noise isn't much, and doesn't bother me. when it happens, i know exactly what it is. really not a big deal.
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04-10-2018, 07:48 AM | #21 | |
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Dave Z is a good dude that I've known for about 15 years. He's honest as they come and won't lead you astray. |
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