The G37S is a great track car - Page 21 - MyG37



The G37S is a great track car

Reply
 
 
 
Thread Tools Search this Thread
Old 05-15-2017, 10:18 AM   #301
4DRZ
Registered User
Thread Starter
iTrader: (4)
 
4DRZ's Avatar
 
Join Date: Sep 2015
Location: Appleton, WI
Posts: 1,774
Thanked 143 Times in 119 Posts
Finally got a chance this weekend to finish installing the rear differential bushings, Z1 expanded capacity diff cover with cooling fins, and flush the diff with some better Redline fluid.

I also picked up some exhaust wrap to use close to the differential to help keep some more heat away from the ABS sensors. Hopefully, all of this will keep my ABS sensors from melting at the next track day. Fingers crossed...



4DRZ is offline   Reply With Quote
Old 05-15-2017, 12:42 PM   #302
bPChaos
Registered User
 
Join Date: Nov 2010
Location: Los Angeles, CA
Posts: 167
Thanked 22 Times in 19 Posts
Quote:
Originally Posted by bsanalyst View Post
Will upload a video shortly. I am quite happy with the current setup, it's little oversteery but plenty of fun. I am still learning how to correct oversteer properly, which is hard with my current setup. I have Hotchkis rear sways at the middle setting (3 way) and front Eibach sway bars at the lower (2 way) setting. I am getting lots of lift off oversteer which I think it unusual given the slight bias of weight to the front and the multilink suspension setup. I may move the Eibach fronts to the higher setting and see if it fixes that issue.
From what I understand, having talked to the local Z car guys, we could use a lot more front roll stiffness, leaving the rears relatively soft compared to the rear. It really hooks the rear down and lets you power through corners without too much compromise.

My suspension tuning is probably different than yours, but I have a Hotchkis sway in the front only. Despite how counter intuitive that sounds, it works for me haha.
bPChaos is offline   Reply With Quote
Old 05-15-2017, 11:55 PM   #303
bsanalyst
Registered User
 
Join Date: Aug 2016
Location: Northern California
Posts: 90
Thanked 11 Times in 8 Posts
4DR, let me know how the car feels after the fresh diff fluid. I am thinking of changing mine soon given how I've been beating on the car lately.

bP, that is definitely a unique set up. I did the same, except only the Hotchkis rear sway bar (on the middle setting). Let's just say that wasn't a very safe setting, in any environment :P
bsanalyst is offline   Reply With Quote
Old 05-16-2017, 02:48 AM   #304
bsanalyst
Registered User
 
Join Date: Aug 2016
Location: Northern California
Posts: 90
Thanked 11 Times in 8 Posts
Video is up. Enjoy!

bsanalyst is offline   Reply With Quote
Old 05-16-2017, 07:11 AM   #305
RMB5190
Registered User
iTrader: (1)
 
Join Date: Dec 2016
Location: Maryland
Posts: 1,263
Thanked 118 Times in 111 Posts
I'll say, You have definitely improved from the last video you posted. Noticeable difference. Those first two sets of runs were very impressive. Great save at the end of the first video and you said it best... gotta be happy keeping up with the Miata, a track staple, in a 3800 pd Sedan.

Definitely pushing it in the last set of runs lol
RMB5190 is offline   Reply With Quote
Old 05-16-2017, 11:18 AM   #306
bsanalyst
Registered User
 
Join Date: Aug 2016
Location: Northern California
Posts: 90
Thanked 11 Times in 8 Posts
Quote:
Originally Posted by RMB5190 View Post
I'll say, You have definitely improved from the last video you posted. Noticeable difference. Those first two sets of runs were very impressive. Great save at the end of the first video and you said it best... gotta be happy keeping up with the Miata, a track staple, in a 3800 pd Sedan.

Definitely pushing it in the last set of runs lol
Thanks for the compliment! The videos are not chronological, I just compiled all the spin out videos into one sequence.
bsanalyst is offline   Reply With Quote
Old 05-16-2017, 11:42 AM   #307
4DRZ
Registered User
Thread Starter
iTrader: (4)
 
4DRZ's Avatar
 
Join Date: Sep 2015
Location: Appleton, WI
Posts: 1,774
Thanked 143 Times in 119 Posts
Quote:
Originally Posted by bPChaos View Post
From what I understand, having talked to the local Z car guys, we could use a lot more front roll stiffness, leaving the rears relatively soft compared to the rear. It really hooks the rear down and lets you power through corners without too much compromise.

My suspension tuning is probably different than yours, but I have a Hotchkis sway in the front only. Despite how counter intuitive that sounds, it works for me haha.
My first track with this car was a very short technical track where the car was understeering a bit with the Hotchkis rear sway set at full soft. I stiffened it up a bit to the middle setting and it was perfect for that track- the back end would only step out a bit when provoked and it was predictable. I kept the same setting at Road America and it was also good. This is on Tein Basis coilovers and 245 & 275/19 RE-91R's.

Quote:
Originally Posted by bsanalyst View Post
4DR, let me know how the car feels after the fresh diff fluid. I am thinking of changing mine soon given how I've been beating on the car lately.
I am trying to remember as I originally flushed it with this fluid last fall after everything got too hot. I don't recall any big difference, but I am hoping that combining the fluid with the diff cover and the exhaust wrap will solve my heat issues.
4DRZ is offline   Reply With Quote
Old 05-18-2017, 11:16 AM   #308
4DRZ
Registered User
Thread Starter
iTrader: (4)
 
4DRZ's Avatar
 
Join Date: Sep 2015
Location: Appleton, WI
Posts: 1,774
Thanked 143 Times in 119 Posts
When we split the exhaust to do the rear differential bushings recently we noticed that the gasket between the y-pipe and midpipe was cracked. Wow did the car make a lot of noise from that small crack! So I got a heavy duty metal replacement from Z1 Motorsports. I also picked up some for between the y-pipe and cats in case they go bad. Much, much quieter now. Anyone else have issues with gaskets breaking down under the heat of a track day?




4DRZ is offline   Reply With Quote
Old 05-19-2017, 10:49 PM   #309
bsanalyst
Registered User
 
Join Date: Aug 2016
Location: Northern California
Posts: 90
Thanked 11 Times in 8 Posts
What are peoples' thoughts on "digressive" valved coilovers. Some of the higher end coilovers have this feature, e.g. FA500, KWV3, BC DR come to mind.

Can anyone actually speak from experience on the difference between digressive vs. progressively valved shocks, especially in a HPDE scenario?
bsanalyst is offline   Reply With Quote
Old 05-19-2017, 11:20 PM   #310
slartibartfast
Registered User
iTrader: (4)
 
Join Date: Oct 2014
Location: Houston, Tx
Posts: 1,997
Thanked 173 Times in 158 Posts
There are three styles of damping -- linear, progressive and digressive. As its name suggests, linear damping force increases in linear fashion as shaft velocity increases. Progressive damping increases damping force faster than linear as shaft velocity rises. Lastly, digressive reduces damping force as velocity rises. Of course, these are very simplified. OEMs use digressive damping for the most part.

There are many web sites that explain this stuff. I like Fat Cat Motorsports video series on youtube. While his bread and butter is Miata, he works on any rebuildable Bilstein damper. His shows many damper curves as he tests dampers on his dyno.

Look at Shim ReStacker,
slartibartfast is offline   Reply With Quote
Old 05-20-2017, 02:25 PM   #311
bsanalyst
Registered User
 
Join Date: Aug 2016
Location: Northern California
Posts: 90
Thanked 11 Times in 8 Posts
Quote:
Originally Posted by slartibartfast View Post
There are three styles of damping -- linear, progressive and digressive. As its name suggests, linear damping force increases in linear fashion as shaft velocity increases. Progressive damping increases damping force faster than linear as shaft velocity rises. Lastly, digressive reduces damping force as velocity rises. Of course, these are very simplified. OEMs use digressive damping for the most part.

There are many web sites that explain this stuff. I like Fat Cat Motorsports video series on youtube. While his bread and butter is Miata, he works on any rebuildable Bilstein damper. His shows many damper curves as he tests dampers on his dyno.

Look at Shim ReStacker,
Thank you for the introduction to Fat Cat Motorsports. A diamond in the rough...
bsanalyst is offline   Reply With Quote
Old 05-21-2017, 07:15 PM   #312
4DRZ
Registered User
Thread Starter
iTrader: (4)
 
4DRZ's Avatar
 
Join Date: Sep 2015
Location: Appleton, WI
Posts: 1,774
Thanked 143 Times in 119 Posts
What types of coolant temps do you guys usually see?

I have a Phase 2 radiator cap with a temp. gauge now and it reads about 170 on the commute to work, 200 after a "spirited" drive on some winding roads on the way to Road America, and 210 after a very easy 20 min touring session on Road America. The red section on the gauge starts at 220 and I think I will easily go over that on a full out track day. I am thinking a bigger radiator is in order to help with the temps. Last time I did a track day at Road America some coolant was spitting out a bit.



4DRZ is offline   Reply With Quote
Old 05-23-2017, 07:56 AM   #313
Splitter
Registered User
iTrader: (1)
 
Join Date: Jan 2016
Location: Houston, TX
Posts: 196
Thanked 18 Times in 16 Posts
I've just been looking at the csf triple pass radiator myself after following the tidings of a friend who had chronic overheating during the recent one lap of America event, eventually did a head gasket. They seem like cheap insurance, but a few reports from around the internet of them leaking, so I'm not sure what to look at. Someone over at the370z.com apparently does replacement bungs to stop the leaking/seizing.

I'm going to start logging water temps at my next track day to see what temps actually get to before biting the bullet on any more upgrades tho. Oh and I think the NISMO radiator cap is higher pressure, which will help, not sure what that pressure is tho
Splitter is offline   Reply With Quote
Old 05-24-2017, 03:29 PM   #314
4DRZ
Registered User
Thread Starter
iTrader: (4)
 
4DRZ's Avatar
 
Join Date: Sep 2015
Location: Appleton, WI
Posts: 1,774
Thanked 143 Times in 119 Posts
Quote:
Originally Posted by Splitter View Post
Oh and I think the NISMO radiator cap is higher pressure, which will help, not sure what that pressure is tho
Funny you should mention that. A lot of the radiator caps that claim to be high pressure have the exact same rating or lower than the stock cap. In fact, the cap I have now claimed it was a higher pressure rating than stock for "improved performance." Nope, exact same rating as stock.
4DRZ is offline   Reply With Quote
Old 05-29-2017, 11:09 AM   #315
4DRZ
Registered User
Thread Starter
iTrader: (4)
 
4DRZ's Avatar
 
Join Date: Sep 2015
Location: Appleton, WI
Posts: 1,774
Thanked 143 Times in 119 Posts
Do any of you track guys run a different radiator? If so, what differences are you noticing in temps?

My coolant temp. gauge stays right in the middle, but it does spit some coolant out the top on long track days. Was thinking of a bigger radiator or vented hood- both would be good, but I figure the radiator would be better

I was thinking of this CSF radiator from Z1 Motorsports and a set of their silicone hoses. Thoughts?

4DRZ is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
370Z Part Compatibility with G37 RogerSmith MODDING 411 3 05-28-2016 05:04 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 08:12 AM.


Copyright 2002 - 2017, MYG37.COM All Rights Reserved.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: