Hot laps on an F1 track, and I have questions. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 05-22-2013, 10:08 PM   #1
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 2,050
Total Cats: 433
Default Hot laps on an F1 track, and I have questions.

I will be taking my car on Istanbulpark, the 5.35 km, 14 turn F1 track on June 2nd for a trackday event.

I have some concerns:

Even though I have a big brake conversion front and back (corrado rotors, etc) I still have stock (raybestos ceramic) pads all around.

Do you guys think I can manage more than one lap without disastrous fade issues?
I could alternate one hot lap and one cool down lap during the session, if it looks too bleak...

Or, what would you say about fabbing some temporary brake ducting?

Also, my alignment is as folllows:

Front:
Toe 0.00 mm
Camber -1.50
Caster 5 ish, set at max.

Rear:
Toe 0.5 mm IN per side
Camber -2.5 ish

Do you guys see a potential problem with sweeping turns with this setup?

I am also thinking about a quick and dirty intercooler spray setup to help with IAT levels.
(2 or 4 cheap windshield washer nozzles, a temporary windshield washer bottle, and MS output programmed to kick the pump relay at TPS>80 and Boost>5 psi. This would take me about half an hour to set up.

What do you think?

Oh, I will be shooting for 1:24.769
Godless Commie is offline   Reply With Quote
Old 05-22-2013, 10:59 PM   #2
Junior Member
 
Join Date: Jun 2011
Location: Houston
Posts: 409
Total Cats: 17
Default

Don't do the intercooler spray.

If you want to get an alignment, swapping your front and rear camber #'s would be helpful, but its not crucial.

The brakes are very important. What kind of fluid do you have? I would swap to at least some good street/track pads and flush your brake fluid with some high temp stuff.
Handy Man is offline   Reply With Quote
Old 05-23-2013, 02:08 AM   #3
Elite Member
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

Can you not go to better track pads? That would be my concern.
Mobius is offline   Reply With Quote
Old 05-23-2013, 09:36 AM   #4
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

You've got enough time to order pads and fluid I would think. I'm not sure how fast shipping is in europe but if I ordered right now I could have them here monday without paying out the *** for shipping. And then its brakes on a miata, so its like 2 hours tops.
Leafy is offline   Reply With Quote
Old 05-23-2013, 11:18 AM   #5
I haz no trubo
iTrader: (2)
 
Oscar's Avatar
 
Join Date: Jan 2007
Location: Bolton, UK
Posts: 3,021
Total Cats: 114
Default

You can have my XP8s with 70% left for shipping if you want. (And I can find them)
Oscar is offline   Reply With Quote
Old 05-23-2013, 11:53 AM   #6
Elite Member
iTrader: (4)
 
Join Date: Sep 2006
Location: Charlotte, NC
Posts: 3,052
Total Cats: 7
Default

I would worry about getting better brake pads and fluid, and not the other stuff.

Being an F1 track, I'm guessing it's going to fairly hard on brakes for a street car.

Seriously, get some track pads, or at least high performance pads and some good fluid. I wouldn't go near any track with stock pads...
Efini~FC3S is offline   Reply With Quote
Old 05-23-2013, 11:56 AM   #7
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Quote:
Originally Posted by Efini~FC3S View Post
I would worry about getting better brake pads and fluid, and not the other stuff.

Being an F1 track, I'm guessing it's going to fairly hard on brakes for a street car.

Seriously, get some track pads, or at least high performance pads and some good fluid. I wouldn't go near any track with stock pads...
I'm trying to remember the F1 tracks. Is Istanbull the track with that corner that has like 4 apexs? Its got some hyperbolic name.
Leafy is offline   Reply With Quote
Old 05-23-2013, 12:14 PM   #8
Elite Member
iTrader: (4)
 
Join Date: Sep 2006
Location: Charlotte, NC
Posts: 3,052
Total Cats: 7
Default

Yes, I believe Turn 8 at Istanbul is the corner you are referring to.

I think Istanbul is the track where Webber and Vettel crashed eachother out of the lead a couple of years ago. The first real "incident" between the two...
Efini~FC3S is offline   Reply With Quote
Old 05-23-2013, 12:32 PM   #9
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 2,050
Total Cats: 433
Default

Quote:
Originally Posted by Oscar View Post
You can have my XP8s with 70% left for shipping if you want. (And I can find them)
PM sent.
Thank you!
Godless Commie is offline   Reply With Quote
Old 05-24-2013, 01:48 AM   #10
Senior Member
 
Join Date: Dec 2010
Location: Auckland, NZ
Posts: 783
Total Cats: 23
Default

Absolutely, Brake pads and fluid. Not even a maybe....!!!!
mx5-kiwi is offline   Reply With Quote
Old 05-24-2013, 07:02 PM   #11
Senior Member
 
Join Date: Oct 2011
Location: The Race Track & St Pete FL
Posts: 587
Total Cats: 47
Default

Attached Thumbnails
Hot laps on an F1 track, and I have questions.-googleearth_image_zps07296049.jpg  
1993ka24det is offline   Reply With Quote
Old 06-02-2013, 06:37 PM   #12
Elite AbsurdFlow Member
 
Laur3ns's Avatar
 
Join Date: Mar 2008
Location: Enschede, NL
Posts: 2,058
Total Cats: 11
Default

You will have water temperature issues if this is your first turbo track day. Unless you have a huge radiator and followed the ducting doctrine taught here. Go slow, watch the meters.

But yes, pads n fluid.
Laur3ns is offline   Reply With Quote
Old 06-03-2013, 05:56 PM   #13
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 2,050
Total Cats: 433
Default

Well, I did it.

Better track pads have not arrived in time, so I fabbed up a brake ducting setup. Worked like a charm.
I also flushed the brake fluid and used Motul DOT 5.1.

Max oil temp: 105C
Max coolant temp: 94C (Killer homemade reroute, chinese 2 row 55mm rad, ducting)
Max boost: 15 psi
Max EGT: 922C
(I went out again without cooling the engine, EGT then climbed to 1005C at redline in 4th)
Max RPM: 7842 (That was a rather overzealous downshift attempt chasing down an S2K)
My best lap: 2.44 (Equal to a pretty expensive corvette, and in the top 10 or 12 in a field of 150+ cars)

KU36 Kumhos are unreal. I could place the car wherever I pleased, anytime, anyplace on the track.
Godless Commie is offline   Reply With Quote
Old 06-03-2013, 06:00 PM   #14
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 2,050
Total Cats: 433
Default

One thing I should have thought about:






That happened maybe 5 miles after I left Istanbulpark. I was cruising at maybe 40 mph, with a cup of tea and a cigarette, still smiling after the track high, and suddenly the engine went away. No more throttle.
I pulled over, instinctively reached over to the throttle pulley, and it just fell out as I grabbed it.
The rest of the story involves a tow truck.


What sayeth you guys about the Skunk2 throttle body?
Attached Thumbnails
Hot laps on an F1 track, and I have questions.-20130603162445.jpg   Hot laps on an F1 track, and I have questions.-20130603162407.jpg   Hot laps on an F1 track, and I have questions.-20130603162413.jpg  
Godless Commie is offline   Reply With Quote
Old 06-03-2013, 06:02 PM   #15
Elite Member
iTrader: (13)
 
Join Date: Dec 2006
Location: Taos, New mexico
Posts: 5,703
Total Cats: 237
Default

Your results sound awesome, congrats. Do you have any videos?

Also, did your motor ingest anything when the TB failed? Hopefully not..
Fireindc is offline   Reply With Quote
Old 06-03-2013, 06:06 PM   #16
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 2,050
Total Cats: 433
Default

Quote:
Originally Posted by Fireindc View Post
Your results sound awesome, congrats. Do you have any videos?

Also, did your motor ingest anything when the TB failed? Hopefully not..
Thanks..

I guess I am incredibly lucky. The butterfly shaft broke inside the bearing, and it was a clean break. No bits were lost into the engine.

A close examination of the break revealed it had cracked quite a while ago.
Turns out I got on the track with less than 1/5 of the shaft diameter intact.
Godless Commie is offline   Reply With Quote
Old 06-03-2013, 06:07 PM   #17
Junior Member
 
Join Date: Jun 2011
Location: Houston
Posts: 409
Total Cats: 17
Default

Ouch! I have a friend who put the Skunk2 TB on his turbo Autoxer. He said it works well, but was a PITA to install. Something about it not fitting right, requiring modification and needing to make his own gasket if I remember correctly.
Handy Man is offline   Reply With Quote
Old 06-03-2013, 06:08 PM   #18
I haz no trubo
iTrader: (2)
 
Oscar's Avatar
 
Join Date: Jan 2007
Location: Bolton, UK
Posts: 3,021
Total Cats: 114
Default

Quote:
Originally Posted by Godless Commie View Post

What sayeth you guys about the Skunk2 throttle body?
Want me to add another one to my order? Big box still hasn't left 949
Oscar is offline   Reply With Quote
Old 06-03-2013, 06:33 PM   #19
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 2,050
Total Cats: 433
Default

Oscar, is it OK if I call you in a little while?
I may take you up on this offer.
Godless Commie is offline   Reply With Quote
Old 06-03-2013, 06:34 PM   #20
Elite Member
iTrader: (2)
 
Join Date: Sep 2008
Location: Central Florida
Posts: 3,284
Total Cats: 178
Default

Got to put in some laps on the F1 track, had a TB shaft break but no collateral damage (fingers crossed), and - presumably - not waylaid by rioters.

Sounds like a good day!
Scrappy Jack is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Rotrex cooling issue gsyk59 Engine Performance 49 11-22-2015 05:11 AM
Track Video & Bluetooth MS3 Questions ofspunk7 General Miata Chat 3 08-31-2015 03:14 PM
Lap Timer? 99mx5 General Miata Chat 18 06-22-2009 11:33 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



All times are GMT -4. The time now is 10:42 PM.