|
|
SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
Post Reply |
|
Thread Tools | Search this Thread |
05-27-2011, 03:41 AM | #23 |
///M-fanatic
193
Rep 3,885
Posts |
^ Thanks for the informative post!
Yeah, a friend of mine living in Canada says that ST60s and ST40s have annoying kickback when he's tracking. When I told him that I was possibly looking into StopTech BBKs as my 4th or 5th choice on the BBK priority list, he warned me about this very issue. Says that I need to pay attention and pump the brakes every now and then to make sure I don't get on the brakes and have nothing there The odd thing is, he called StopTech and complained about the issue. They just claimed that it's not something that's supposed to happen |
Appreciate
0
|
05-27-2011, 06:23 AM | #24 | |
Track Head
24
Rep 503
Posts |
Quote:
__________________
2004 Porsche GT3 |White
HRE R40 Monoblocks | KW Clubsport Suspension | RSS Lower Control Arms and Suspension Links | GT3RS Wing and Front Bumper | Cup Car Lip | Euro GT3 Seat | GMG Half Cage | Europipe Exhaust | EPL Tuning |
|
Appreciate
0
|
05-27-2011, 06:23 AM | #25 |
Lieutenant General
2432
Rep 11,667
Posts |
+1 great info coming together here.
This is the first I've heard about a kickback issue. It would be great if more members running BBKs would chime in on this. One thing that comes to mind is our pad drying system. I wonder if that could somehow be triggered for track use?
__________________
'21 M2C Hockenheim Silver
'18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold) |
Appreciate
0
|
05-27-2011, 10:50 AM | #26 |
///M-fanatic
193
Rep 3,885
Posts |
|
Appreciate
0
|
05-27-2011, 11:17 AM | #27 |
Midlife Crises Racing Silent but Deadly Class
1821
Rep 5,337
Posts
Drives: 2006 MZ4C, 2021 Tesla Model 3
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day
|
Pad drying only activates when wipers are active.
__________________
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
|
Appreciate
0
|
05-27-2011, 11:24 AM | #29 |
Private First Class
73
Rep 170
Posts |
Knock back springs should cure the issue.
I'm not sure if Stoptech includes these with there calipers or not, however AP /Brembo / PFC have this option with there race calipers. You can even order them with different spring rates. Hope this helps... Last edited by BookerM3; 05-27-2011 at 04:11 PM.. |
Appreciate
0
|
05-27-2011, 06:08 PM | #31 |
Second Lieutenant
16
Rep 232
Posts |
Knockback is pretty bad with my Stoptechs, only started happening when the handling capability of the car was much better than stock. TCKline DA suspension, PSC tires, etc. I really don't think it should happening but two shops have looked at it and said everything is fine. Stoptech said I could try the kick back springs but they said it will be annoying for daily driving. Anyone with any ideas?
|
Appreciate
0
|
05-27-2011, 06:20 PM | #32 | |
Lieutenant General
2432
Rep 11,667
Posts |
Quote:
__________________
'21 M2C Hockenheim Silver
'18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold) |
|
Appreciate
0
|
05-27-2011, 07:20 PM | #33 |
Second Lieutenant
16
Rep 232
Posts |
|
Appreciate
0
|
05-28-2011, 01:00 AM | #34 | |
Private
4
Rep 72
Posts |
Quote:
We did not experience it on Nittos, we only had the issue on Slicks or Hoosiers. With them G's, something will give on a stock car. The C6 OEM caliper was a pain with the padlets (3 per caliper). GM was aware of the flex and when we swapped back to padlets, the issues went away. At the time no one made a decent race pad for the C6 Z06. Thus simplify, or so we thought, with Stoptech or a BBK. Don't get me wrong, I don't think Stoptech is the issue, I think ANY Monblock style is the issue. I have very high regard for the Stoptech product and use it on other cars. They do their home work on bias and max the OEM master and prop valves. Brembo had the better true floating rotor design at that time. that should help some with kick back. But some systems use an adjustable prop valve, not so good for a driver/tracker car. If the Z4 does not get the same level of flex , then we are good. I just don't know. The poster quoted here, has a real world level of experience with them on a car running Nitto's. If that is what you run, it sounds like good advice. If you are going to be more aggressive, it seams to me, with far more M3's running a similar spindle , hub and caliper, we can make a few assumptions when it comes to our cars. Just saying I would do my homework. The best advise I can give is too let a real Pro drive the car. If you can't beat or match their times, more seat time is required. Period. IMO Trying to replace skill with parts is a bit of a losing battle. Seat time is king. I know crap 70's Alpha's or 95-08 M3's with good drivers that will out run R8's and Stradale's , Zo6's and Ford GT's. Sure you can buy your way around some cars. But what fun is that? Honestly, nothing feels better than to wax a car with with twice the HP 22 Tracks days is about the same $'s as a BBK. Or go to a really good school. Personally I like Spring Mtn in Pahrump Nevada. Great training track and you will come back 4-10 secs faster depending on your current level. Tell Dave and Victor what you want to achieve. |
|
Appreciate
0
|
05-28-2011, 12:16 PM | #35 | |
///M-fanatic
193
Rep 3,885
Posts |
Quote:
Cobra, I'm pretty sure a pro driver can get really close to, if not beat 1:40 with my car currently as-is; without upgrading brakes or tires or anything. That pretty much puts me at around 7 seconds slower I've not a doubt in my mind that I need more seat time |
|
Appreciate
0
|
05-28-2011, 02:22 PM | #36 |
Midlife Crises Racing Silent but Deadly Class
1821
Rep 5,337
Posts
Drives: 2006 MZ4C, 2021 Tesla Model 3
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day
|
I'm going to have to break this to you. It is going to get progressively HARDER to drop time as you get faster. Soon you will be counting 10th and 100th as big improvements. Don't be surprised if you NEVER got to the 1:40.
http://www.fastestlaps.com/tracks/laguna_seca.html The Audi R8 in a professional's hand couldn't break 1:40.
__________________
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
|
Appreciate
0
|
05-29-2011, 07:14 PM | #37 |
///M-fanatic
193
Rep 3,885
Posts |
haha good game....
But you know, I find that some of these are kind of off. For example, #35 Porsche 997 Carrera S. How could that only run 1:50? |
Appreciate
0
|
05-29-2011, 07:30 PM | #38 |
M = Midlife Crisis
65
Rep 2,006
Posts |
With all do respect... Most of us here do not need BBK's to get our times down at our local tracks. The OE brakes, with an upgraded friction material will suffice for the majority. BBK's look sweet however!
__________________
2006 Z4MC - #LL93158
SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM |
Appreciate
0
|
05-30-2011, 02:05 AM | #39 | |
Private
4
Rep 72
Posts |
Quote:
|
|
Appreciate
0
|
05-30-2011, 11:35 AM | #41 |
M = Midlife Crisis
65
Rep 2,006
Posts |
Very true - the SS lines sure improved my pedal feel!
__________________
2006 Z4MC - #LL93158
SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM |
Appreciate
0
|
05-30-2011, 12:26 PM | #42 | |
Midlife Crises Racing Silent but Deadly Class
1821
Rep 5,337
Posts
Drives: 2006 MZ4C, 2021 Tesla Model 3
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day
|
Quote:
Also, a long time ago I interviewed Bill Auberlen after a race at Laguna Seca, and "off the record" he said that Laguna Seca seems to favor BMWs in terms of set-up. This was a race where he had beaten a couple of Mustang GTs for a win in GS and the closest Porsche was 3 or 4 positions back of him... Lastly, comparing lap times driven by pros...Something about Princess Leia...yeah. Just sayin' that dropping SECONDS off of your lap time isn't as easy as it seems on Gran Turismo. IF your goal really is a time in the 1:40s? The first tool you need to invest in is a data acquisition unit, not big brakes.
__________________
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
|
|
Appreciate
0
|
05-30-2011, 07:20 PM | #43 |
///M-fanatic
193
Rep 3,885
Posts |
|
Appreciate
0
|
05-30-2011, 08:24 PM | #44 |
Track Head
24
Rep 503
Posts |
I 100% agree with this statement, my Traqmate was one of the best investments I've made. Especially as you get closer to your ideal time, finding a nut who is willing to sit in the passenger seat while you hammer at 10/10th is much more difficult, most pros prefer data coaching. Coaching is another investment I've found to be worht it's weight in gold, both pro and senior driver/free coaching.
__________________
2004 Porsche GT3 |White
HRE R40 Monoblocks | KW Clubsport Suspension | RSS Lower Control Arms and Suspension Links | GT3RS Wing and Front Bumper | Cup Car Lip | Euro GT3 Seat | GMG Half Cage | Europipe Exhaust | EPL Tuning |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|