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      07-30-2017, 12:46 PM   #23
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Like I said....if it's not slipping in 4th when you are WOT, its not your clutch, its our stupid CDV.
Shift to 4th, cruise at 2k, then WOT it. At peak torque around 3k-4k and youre not slipping its not the clutch.

We just need lines made and use the old metal E9x slaves you can still find online.

Also ChickenJoe, can you share who did a successful CDV here?
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      07-30-2017, 12:50 PM   #24
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Like I said....if it's not slipping in 4th when you are WOT, its not your clutch, its our stupid CDV.
Shift to 4th, cruise at 2k, then WOT it. At peak torque around 3k-4k and youre not slipping its not the clutch.

We just need lines made and use the old metal E9x slaves you can still find online.

Also ChickenJoe, can you share who did a successful CDV here?
I will try this. I don't want to crash my LPFP tho lmfao. Idk who the fuck did it. I think that guy with the 535i. He is on this thread
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      07-30-2017, 12:52 PM   #25
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Originally Posted by Bmw doubles View Post
The 550/335is clutch fits on the N55. Mine is running like a champ with 500wtq. The CDV is built in for you guys. Mine is not so maybe a mod to an earlier clutch slave cylinder is possible for you guys.
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The 550/335is clutch fits on the N55. Mine is running like a champ with 500wtq. The CDV is built in for you guys. Mine is not so maybe a mod to an earlier clutch slave cylinder is possible for you guys.
You are one of the only people I know of with a modded CDV on you're car. I wonder if the 535 Slave is compatible with the F30
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      07-30-2017, 12:54 PM   #26
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Originally Posted by Tchao View Post
Like I said....if it's not slipping in 4th when you are WOT, its not your clutch, its our stupid CDV.
Shift to 4th, cruise at 2k, then WOT it. At peak torque around 3k-4k and youre not slipping its not the clutch.

We just need lines made and use the old metal E9x slaves you can still find online.

Also ChickenJoe, can you share who did a successful CDV here?
Also, the clutch only slipped like that when I was running about 7 gallons of E85 from my local station. It has never happened on pump gas. I can fill it with more E85 today and see if it happens again
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      07-30-2017, 01:34 PM   #27
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So for clarity, a modded CDV is a plastic or metal valve adaptor that's external to the clutch slave. Modding the CDV in this instance is boring out the center of the exposed CDV and making the internal diameter larger. If you're not under warranty anymore completely deleting it is the solution to this slipping.

Incases where the CDV is internal and therefore not modifiable I'm suggesting modding the entire clutch slave to a version where the CDV is on the outside. Mine is a 2011 and I'm not sure when they started putting the CDV inside the clutch slave.

https://www.zeckhausen.com/catalog/index.php?cPath=6562
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      07-30-2017, 02:46 PM   #28
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Originally Posted by Bmw doubles View Post
So for clarity, a modded CDV is a plastic or metal valve adaptor that's external to the clutch slave. Modding the CDV in this instance is boring out the center of the exposed CDV and making the internal diameter larger. If you're not under warranty anymore completely deleting it is the solution to this slipping.

Incases where the CDV is internal and therefore not modifiable I'm suggesting modding the entire clutch slave to a version where the CDV is on the outside. Mine is a 2011 and I'm not sure when they started putting the CDV inside the clutch slave.

https://www.zeckhausen.com/catalog/index.php?cPath=6562
I believe it was the same part as the e90 but they just got rid of the part number when they made it internally integrated. But you are for sure thinking this is the cause of my slipping? I went out and just put 7 gallons of "E85" in the car and will be trying to make it slip like it did before. Same map 5 any mods. Will be updating throughout the week.
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      07-30-2017, 03:52 PM   #29
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So which one of these parts would be where the CDV is located? I was thinking it would be 13 or maybe 14
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      07-31-2017, 03:17 PM   #30
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The CDV is inside your slave...so it would be #14.

Has anyone taken off their slave? I wonder if the restrictor is right at the line connection, or is it casted internally?
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      07-31-2017, 05:39 PM   #31
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The CDV is inside your slave...so it would be #14.

Has anyone taken off their slave? I wonder if the restrictor is right at the line connection, or is it casted internally?
I would hope it's not case internally. If it is it would only be a matter of making a new line but ibmay try and find a slave to buy and fool with for a little bit
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      07-31-2017, 06:39 PM   #32
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So the CDV is built into the plastic casting for sure. Only question is if its near the outside so we can drill it out bigger, or is it somewhere deeper in, and therefore we are screwed.
I think the latter.

Anyhoo, its pretty simple if you get new lines, just buy a E90 metal slave and call it a day.
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      08-01-2017, 01:21 PM   #33
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Guys would it be possible that I glazed my clutch and it's not actually slipping but when it get really hot it goes not grab well?
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      08-01-2017, 03:35 PM   #34
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Yes it definitely can. We run organic as OE, so definately can glaze if its slips and allowed to for a long duration. Like a 1-2 shift with the CDV...and you keep it WOT even when you know its slipping. Usually you will smell it too. Organic clutches STINKS.

Not sure how "deGlazing" really works, or even if it works. Your flywheel should be impregnated with polished tiny glass-like particles from the clutch when you glaze. Some say to ride the clutch several times to grind it away. But I cannot trust that suggestion. Maybe others can chime in?
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      08-01-2017, 07:29 PM   #35
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Quote:
Originally Posted by Tchao View Post
Yes it definitely can. We run organic as OE, so definately can glaze if its slips and allowed to for a long duration. Like a 1-2 shift with the CDV...and you keep it WOT even when you know its slipping. Usually you will smell it too. Organic clutches STINKS.

Not sure how "deGlazing" really works, or even if it works. Your flywheel should be impregnated with polished tiny glass-like particles from the clutch when you glaze. Some say to ride the clutch several times to grind it away. But I cannot trust that suggestion. Maybe others can chime in?
I see. Thank you for your help. This makes more sense. I had a feeling that if it was slipping then it would definitely slip when I try to make it. I think that if I glazed it I would only be when it's super hot. As I may have said earlier, I went back roading on Sunday and drove the car very hard in 2-3rd gears. Trans temp was 200+ and I was running the same E85 blend I was before. However because I am cautious of unknown road I left the tracking control in sport so the rear tires really didn't have any slip. Maybe if I would have done the same thing in maybe Sport+ or DSC off like I normally drive it would have "slipped" like it did previously with the engine and trans hot. I did smell something weird on our drive but all of the cars were catless and had many mods so it may have been another car. Could have been brakes or something else from the STI or the N54 ahead of me.
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      11-23-2017, 11:55 PM   #36
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Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
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      11-24-2017, 12:31 AM   #37
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Yes, I have felt this on WOT 1 -> 2 shifts and even 2 -> 3 shifts while stock. Hoping someone will be able to solve this soon
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      11-24-2017, 11:58 AM   #38
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Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
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      11-24-2017, 04:39 PM   #39
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Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
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Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Interesting. Glad you never had to replace it. I don't have the balls to run past map 1 on my stock clutch I just feel like I'm gonna blow it up every time!
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      11-25-2017, 12:28 AM   #40
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Originally Posted by Chicken_Joe View Post
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Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
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Quote:
Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Interesting. Glad you never had to replace it. I don't have the balls to run past map 1 on my stock clutch I just feel like I'm gonna blow it up every time!
I have run map7 on 110 race gas lol it will hold. Especially when it's cold.
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      11-30-2017, 09:08 PM   #41
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Quote:
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Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Quote:
Originally Posted by Chicken_Joe View Post
Quote:
Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Interesting. Glad you never had to replace it. I don't have the balls to run past map 1 on my stock clutch I just feel like I'm gonna blow it up every time!
I have run map7 on 110 race gas lol it will hold. Especially when it's cold.
Quote:
Originally Posted by Chicken_Joe View Post
Quote:
Originally Posted by Bigmo93 View Post
Quote:
Originally Posted by Chicken_Joe View Post
Quote:
Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Quote:
Originally Posted by Chicken_Joe View Post
Quote:
Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Interesting. Glad you never had to replace it. I don't have the balls to run past map 1 on my stock clutch I just feel like I'm gonna blow it up every time!
I have run map7 on 110 race gas lol it will hold. Especially when it's cold.

Good to know. I've had my ER catless downpipe sitting in the box untouched for 8 months because I've been too much of a baby to put it in and run map 2 ???? was worried about blowing up the clutch with the increased power
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      11-30-2017, 09:42 PM   #42
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Bruh I also have this issue, dealer says itís clutch related so Iím gonna be looking at changing or upgrading the clutch.

I mean, I might as well upgrade if the labour alone costs $1200. Let me know replacement options if you come across anything good!

Last edited by Carbon.F30; 11-30-2017 at 09:52 PM..
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      12-01-2017, 01:06 AM   #43
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I think it's hit or miss really. If you get the clutch super hot it may slip a smidge but if you kinda figure out how to drive it you should not have an issue I don't think. That's not being derogatory in any way but the ZF and 6MT drive way different. ZF will basically save itself with the computer slipping the converter the manual trans will not.
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      12-01-2017, 01:08 AM   #44
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Quote:
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Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Quote:
Originally Posted by Chicken_Joe View Post
Quote:
Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Interesting. Glad you never had to replace it. I don't have the balls to run past map 1 on my stock clutch I just feel like I'm gonna blow it up every time!
I have run map7 on 110 race gas lol it will hold. Especially when it's cold.
Quote:
Originally Posted by Chicken_Joe View Post
Quote:
Originally Posted by Bigmo93 View Post
Quote:
Originally Posted by Chicken_Joe View Post
Quote:
Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Quote:
Originally Posted by Chicken_Joe View Post
Quote:
Originally Posted by Bigmo93 View Post
Chicken joe, did you ever end up replacing your clutch? If so what'd you go with? And any answer to the crappy CDV?
I actually never replaced my clutch. I weirdly haven't had it slip anymore. I think it may have been something that happened when the temps outside were very hot and the tranny was also very hot and it cause the clutch to slip. It's been cooler here in STL and I have run like 8.5 gallons of E85 and dogged the Car super hard and haven't had an issue at all.
Interesting. Glad you never had to replace it. I don't have the balls to run past map 1 on my stock clutch I just feel like I'm gonna blow it up every time!
I have run map7 on 110 race gas lol it will hold. Especially when it's cold.

Good to know. I've had my ER catless downpipe sitting in the box untouched for 8 months because I've been too much of a baby to put it in and run map 2 ???? was worried about blowing up the clutch with the increased power
I run map 5 on the regular with all mods aside form turbo and meth. Should not have any issues running map2 or 5. Tbh map1 is how the car should have come from the factory. It's not "fast" but it's wayyyyy better then what the stock tuning is and is a representation of what it should be like when you buy a turbo inline 6 Car.
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13' 335i M Sport. EBII/Coral Red 6MT. RPI GT exhaust, Resonator delete, BM3 Stage 2, ER CP, VRSF DP. Dinan Shockware. Varis Japan carbon front lip. Carbon M Performance rear diffuser. M4 trunk lip. Vvroom custom carbon side fins. Firehawk Indy 500 225/40/19 and 255/35/19
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