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996 CTR

 
Old 06-18-2018, 08:37 AM
  #31  
tom03
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Hello Pete,

yes the Pistenclub event...very smooth driving..I dropped it because of the bad weather forecast.

Are you planning to drive any other event in Germany ?

Thomas
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Old 06-18-2018, 09:04 AM
  #32  
pete95zhn
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Originally Posted by tom03 View Post
Hello Pete,

yes the Pistenclub event...very smooth driving..I dropped it because of the bad weather forecast.

Are you planning to drive any other event in Germany ?

Thomas
Thomas,
Thursday's weather was OK, it started to rain during evening's TF, as you can see from the pic above. I did not attend Pistenclub's trackday but Trackdays.de's one on Wednesday. Very variable weather until afternoon, last few hours were fine. On Thu morning I fixed my car (that MAF) and visited Burg Eltz.
​​​On Monday we were at Bilster Berg. Interesting track indeed... No plans to return over there this year.
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Old 06-18-2018, 09:15 AM
  #33  
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Pete,

how is the balance of your car concerning your front/rear uprights and the RSR rear frames ?

My experience with a mix of RS and GT3 parts was not so good. I finally changed to RS/997 parts.

Thomas
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Old 06-19-2018, 07:18 AM
  #34  
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Thomas,

front uprights are now from 997 GT3 with 996 RSR style subframe, so those are more or less a match now. Rear uprights are still 996 Carrera/GT3 ones, but will be changed next winter to something that matches 997 Cup's subframes I now have. I can't feel any anomalies from the suspension, maybe a pro could...I got it aligned and corner weighed by a pro race shop and IMO it runs great now.
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Old 06-19-2018, 11:04 AM
  #35  
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Hi Thomas,

What did you see, and what parts did you actually change?

Pete, when you say RSR subframe, do you mean the front crossmember?

Ray
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Old 06-19-2018, 01:21 PM
  #36  
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Originally Posted by rbahr View Post

Pete, when you say RSR subframe, do you mean the front crossmember?

Ray
Yes
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Old 06-19-2018, 02:11 PM
  #37  
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Originally Posted by rbahr View Post
Hi Thomas,

What did you see, and what parts did you actually change?

Ray
Hi Ray,

basis is a Clubsport GT3 with 997 Cup Monoball rear toe steers/adjustable track rods and
front/rear lower control arms with monoball 997 Cup suspension bushings. Dampers/spring are new 996 RS parts front/rear.
I changed the front uprights to 996 RS parts (superceded to 997 parts/part numbers). Rear uprights and subframes are stock.

My "feeling" was that in fast turnes the car likes to get even more in the turn. Maybe a trend to override. Hard to discribe maybe because of the lower connection points on the front uprights.
However I changed the rear subframes and rear uprights to 996 RS parts. This trend is gone now.
Alignment and conering is always the same done with the same guy on the same equipment.

Thomas
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Old 06-29-2018, 09:04 AM
  #38  
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starting at the 7:00 mark

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Old 06-29-2018, 09:44 AM
  #39  
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Thanks Andi!

Thomas, Pete: What are your ride heights and spring rates?

Thanks

Ray
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Old 06-29-2018, 11:33 AM
  #40  
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Ray,

so I tested the final setup/installation on the street only but it's ok I think it's much better than before.
Ride height is about 112mm (front left).
Springs rates are OEM RS : 45 N/mm progressive front; 95 N/mm rear with OEM RS shocks. I think front /rear 60N/mm / 130N/mm as a dual spring system should be possible.
Next change will be the rear dog bones.

Thomas

Last edited by tom03; 06-29-2018 at 11:44 AM. Reason: ;-)
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Old 06-29-2018, 05:09 PM
  #41  
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Ray, my ride height is 107 / 125 mm. Spring rates are 120 / 160 N/mm. Rear wheels scraped wheel arches a bit, I'm opening more room for them and moving wheels few mm forward. 325/30-19 is a tad larger than 295/30-18 and I could not get vertical loading at local tracks as large as at Nordschleife. Going over 200 kmh to Schwedenkreutz, Fuchsr÷hre or to the dip after D÷ttinger H÷he really loads the suspension.

The plan was to make an introductory video about the CTR with Misha, but on that lap MAF got toasted (actually it got toasted ealier, but then it gave up) and it did not want to run properly and ABS was lost too (because of PSM was not completely off). I only got about 10 laps altogether, while new MAF arrived next morning and it started to rain just after the track was opened for TF.

I suspect that reason for MAF to fail is too hot engine bay. The sensor is located just beside coolant reservoir and the rear hatch is/was very enclosed. Not anymore, I opened more airways with 40mm holesaw when installing that new MAF with a help from Andreas at ring-attack.com. In addation I'm installing some heat shielding around that sensor and above turbines & Cats. IIRC I have 4th MAF now. Air filter is OEM Porsche, just for info. Because of the heat issue I run from GtoB with light throttle, just to get it cooled and timed BtoG, if you're wondering the video above.
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Old 06-30-2018, 05:42 AM
  #42  
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Pete, great build . I like it. Reliability should be a topic...

Last edited by tom03; 06-30-2018 at 07:12 AM. Reason: ;-)
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Old 06-30-2018, 07:10 AM
  #43  
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Ray,

I think the handling with the new parts is better. The car is standing more in the springs than in the control arms.

Thomas

Last edited by tom03; 07-02-2018 at 08:15 AM. Reason: ;-)
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Old 08-04-2018, 04:58 PM
  #44  
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C: J Saarentaus

Last edited by pete95zhn; 08-08-2018 at 01:29 PM.
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Old 08-05-2018, 08:30 AM
  #45  
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pete if your constantly burning up maf units why not just have a mafless file installed? car will run like stock and no more maf issues.
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