VW Racing Big Brake kit product review

[xht20]

Thanks for the advice. In 2 days i will receive the new kit from VWR and then i will look more closely to this. Now i have BBS CH wheels and i understood that they have conical seat

[xht20]

Installed today the new kit, i did everything as they told me, torqued every bolt. Still has that wobble, but is not segnifiant as the first kit. Under harder acceleration at speeds beyond 120km/h the sterring vibrates.

I think i know what's the problem. I attached a picture of the bolts from BBS and the bolts that i received in the brake kit. You see the difference?

[Poppa Dom]

Yes, you need to be running on the 60 degree bbs bolt not the radius bolt if running after market wheels. 

[xht20]

I found out that H&R has 60 degree tapper bolts that are identical with the ones received from BBS, only that they have the lenght of the ones received from VWR. Tomorrow i will order them. Hope that this solves the problem :D

[xht20]

today i changed the bolts with ones that has conic seat and it still has the same wobble. I don't know why. On the rear i have R32 brake setup with Zimmermann discs (tomorrow i will change them with OEM ones, it might be that the ones from rear are not good). Is there a chance that the front brake kit with the big one from rear are too much for the brake fluid pump?

[MAT ED30]

u have pm Teff

[chungster]

i really hope you've not inadvertantly buggered up the bolt holes in the hub from fitting the kit first time round and driving at high speed with insecure wheels due to wrong bolts being used.

[MAT ED30]

i think he might have but i would get all 4 wheels in the air and then spin the wheels to see if they wobble at all

[xht20]

today i will try the brakes with another wheels, and see if there are any improvements.

[DaveB@Vagbremtechnic]

Are there any markings on the top of the VWR longer wheel bolts? Pics?

[jonnyc]

Sorry if I have missed this..

Why do you have to run different/longer bolts..?

[MAT ED30]

I have asked him to put the car in the air and spin the wheels to see if they wobble and if he can get someone in the car to get the wheels up to speed to see if they wobble. He told me wheels are new too

[SteveP]

Sorry if I have missed this..

Why do you have to run different/longer bolts..?

Because the new discs bells have a built in spacer to allow them to fit with the OEM wheels like the Pescara.

[xht20]

Today i went to another service and did the perfect bleed of the calipers. All the services didn't knew that you had to do the bleed on the both sides of the calipers. And that's the cause of the wobbling. Because the caliper wasn;t pushing with the same pressure on the both sides of the disc. I still feel a little vibration, but i will wait to see if it dissapears after some bedding.

The mechanic here told me that is possible that the discs were deformed because of the not-equal pressure pushed on the by the caliper. If this is true, i will buy another set of discs from VWR.

Another thing, about the pedal feel. After this perfect bleeding the pedal response is very prompt. I hit the steering wheel with my head after the braking :))

[MAT ED30]

  nice one i did say to you have you bled them correctly    oh well we got there in the end