Adventures in PTE/TTE - Page 12 - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat. 949 Racing - Rim & tires

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 08-22-2014, 04:17 PM   #221
Newb
 
Join Date: Aug 2013
Posts: 15
Total Cats: 0
Default Good luck @ RA

Good luck to everyone competing at Road Atlanta.

In the spirit of this thread, am I right in saying that 99 miata is the best baseline for TTE/PTE? Not trying to steal any setup ideas, but what is the next step - dyno reclass or point mods? Let's assume the goal is fastest lap at Road Atlanta.

FYI, if you are interested I have run fastest of 1:50.8 with my 95 Miata with street tuned MS, bolt on exhaust and air intake, coilovers and bfg r1 tires. I would like to get into Time trials with nasa so any car setup information would be helpful to satiate my curiosity.
Rajat is offline   Reply With Quote
Old 08-22-2014, 05:35 PM   #222
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 13,367
Total Cats: 810
Default

Quote:
Originally Posted by jandjracing_58 View Post
NO Point Modification:

3) Radiator upgrade/shrouding/fascia modification (drilled or cut holes/slots) that only provides
increased airflow to the radiator or oil/transmission coolers (without aerodynamic or engine
air intake improvement)

Since I am dyno reclassed the point modification for routing an air filter near an inlet which is +1, is null and void.
Must be a change for 2014. I'm 99% sure that the 2013 rules only allowed air filter holes, not cooling holes. Regardless, the additional holes don't make the car faster and they open you up for scrutiny (i.e. you have to prove they don't improve aero, and I could very easily argue that they might/do). I would get rid of them.
Savington is offline   Reply With Quote
Old 08-22-2014, 10:18 PM   #223
Junior Member
 
Join Date: Jul 2014
Location: North Carolina
Posts: 71
Total Cats: -42
Default

Quote:
Originally Posted by Rajat View Post
Good luck to everyone competing at Road Atlanta.

In the spirit of this thread, am I right in saying that 99 miata is the best baseline for TTE/PTE? Not trying to steal any setup ideas, but what is the next step - dyno reclass or point mods? Let's assume the goal is fastest lap at Road Atlanta.

FYI, if you are interested I have run fastest of 1:50.8 with my 95 Miata with street tuned MS, bolt on exhaust and air intake, coilovers and bfg r1 tires. I would like to get into Time trials with nasa so any car setup information would be helpful to satiate my curiosity.
I race a 90 Miata. Pte class

I've been through 1.6 point index and 1.8 swap dyno reclass. In retrospect I wish I kept my 1.6 point index so I can move points around by changing modifications to see what works best. My reclass allows only tires, springs, shocks and diff. With 140hp@2425lbs.

With this pte set up I've ran road Atlanta at 1:44.6. This was competing against no one in a NASA SE event.
jandjracing_58 is offline   Reply With Quote
Old 08-22-2014, 10:21 PM   #224
Junior Member
 
Join Date: Jul 2014
Location: North Carolina
Posts: 71
Total Cats: -42
Default

Quote:
Originally Posted by Savington View Post

Must be a change for 2014. I'm 99% sure that the 2013 rules only allowed air filter holes, not cooling holes. Regardless, the additional holes don't make the car faster and they open you up for scrutiny (i.e. you have to prove they don't improve aero, and I could very easily argue that they might/do). I would get rid of them.
I know I can't prove they don't provide some sort of aero dynamic benefit. The obviousness of the modification is for cooling, I would argue my purpose. I dropped 10-15 degrees on a hot day at vir, I have my telemetry to prove it.
Also, what aero dynamic benefit would drilling holes in a front bumper provide? Holes in the rear bumper is a diffuser, but front seems like more resistance by reducing flat surfaces
jandjracing_58 is offline   Reply With Quote
Old 08-25-2014, 07:29 AM   #225
Newb
 
Join Date: Jun 2010
Location: Santa Barbara
Posts: 22
Total Cats: 4
Default

Quote:
Originally Posted by Rajat View Post
Good luck to everyone competing at Road Atlanta.

In the spirit of this thread, am I right in saying that 99 miata is the best baseline for TTE/PTE? Not trying to steal any setup ideas, but what is the next step - dyno reclass or point mods? Let's assume the goal is fastest lap at Road Atlanta.
I think a points classed '99 is the strongest PTE Miata.
Red_5 is offline   Reply With Quote
Old 08-25-2014, 12:06 PM   #226
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,968
Total Cats: 50
Default

Quote:
Originally Posted by Rajat View Post
Good luck to everyone competing at Road Atlanta.

In the spirit of this thread, am I right in saying that 99 miata is the best baseline for TTE/PTE? Not trying to steal any setup ideas, but what is the next step - dyno reclass or point mods? Let's assume the goal is fastest lap at Road Atlanta.

FYI, if you are interested I have run fastest of 1:50.8 with my 95 Miata with street tuned MS, bolt on exhaust and air intake, coilovers and bfg r1 tires. I would like to get into Time trials with nasa so any car setup information would be helpful to satiate my curiosity.
I run 1.47.x on 205 NT-01s on a 99 with the mods in my sig. PTE regionally runs in 1.44.x to 1.43.x depending on who shows up. Spec miata runs 1.44.x with the one exception some years back that ran 1.42s I don't know how that is/was possible. Might be different tires, as I think SCCA and NASA have different tire sponsors for SM.

TTE ran high 1.48-1.50 last time I was there. Obviously, TTE is ripe for the pickins since they are not running particularly competitive times. TTD ran 1.45.x, so there is definitely room to push both groups.

Another thing, TTE guys usually try to fit A6s in their points vs. PT running the R6 or whatever equivalent is available. So keep in mind that your points might be allocated differently than the predominant PT discussion here.

As for nationals, wait a bit and find out .
Seefo is offline   Reply With Quote
Old 08-27-2014, 10:19 PM   #227
Junior Member
 
Join Date: Jul 2014
Location: North Carolina
Posts: 71
Total Cats: -42
Default

Any one have PTE times from today's RA practice?
jandjracing_58 is offline   Reply With Quote
Old 08-28-2014, 12:33 AM   #228
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 4,535
Total Cats: 838
Default

We need a 2014 NASA eastern championships thread. I'm eager to see how my friends and customers are doing.
emilio700 is online now   Reply With Quote
Old 08-28-2014, 12:49 AM   #229
Junior Member
iTrader: (1)
 
Join Date: Aug 2013
Posts: 224
Total Cats: 13
Default

Test day is tomarrow...
circuitmstr74 is offline   Reply With Quote
Old 08-28-2014, 11:05 AM   #230
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 6,949
Total Cats: 139
Default

Quote:
Originally Posted by circuitmstr74 View Post
Here is a video from a couple months ago at road atlanta in D trim... a 37 is possible.
I'd agree. Looks like the tires were killing you in T5, 6 and 7. Can't throttle-lift up hills w/o paying for it. I assume you're on throttle through those turns with same entry speeds on good tires. That alone would make a big difference. Thoughts are more speed through T1 as it looks like you have more room to track out? I'm guessing it is getting back over for the T3 braking zone?

Nice drive- video shows a winning package IMO- car and driver.
m2cupcar is offline   Reply With Quote
Old 08-28-2014, 11:11 AM   #231
Junior Member
 
Join Date: Mar 2010
Location: Durham, NC
Posts: 369
Total Cats: 13
Default

Quote:
Originally Posted by jandjracing_58 View Post
I race a 90 Miata. Pte class

I've been through 1.6 point index and 1.8 swap dyno reclass. In retrospect I wish I kept my 1.6 point index so I can move points around by changing modifications to see what works best. My reclass allows only tires, springs, shocks and diff. With 140hp@2425lbs.

With this pte set up I've ran road Atlanta at 1:44.6. This was competing against no one in a NASA SE event.
RE the discussion about the 2001 chassis not being competitive. Is your dyno classing just really bad or is the penalty to 2001+ dyno classed cars not existent? I know for a points car they have some problems.

I got 138whp@2390 from Greg which gives me a 5oz advantage!

Based on that it looks like Greg may treat all dyno classed Miatas the same. I figured he would give NBs some extra weight.
FatKao is offline   Reply With Quote
Old 08-28-2014, 11:34 AM   #232
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,968
Total Cats: 50
Default

Quote:
Originally Posted by FatKao View Post
RE the discussion about the 2001 chassis not being competitive. Is your dyno classing just really bad or is the penalty to 2001+ dyno classed cars not existent? I know for a points car they have some problems.

I got 138whp@2390 from Greg which gives me a 5oz advantage!

Based on that it looks like Greg may treat all dyno classed Miatas the same. I figured he would give NBs some extra weight.
if you check the PT auto-dyno reclass section at the end, you will see that the 7* penalty is removed for dyno reclassed 01+. the weight difference is a meager 10-20 lbs compared to the 7*.
Seefo is offline   Reply With Quote
Old 08-31-2014, 07:44 PM   #233
Junior Member
 
Join Date: Jul 2014
Location: North Carolina
Posts: 71
Total Cats: -42
Default

Great driving guys, I wish I was there on track with you all. Next year will be at VIR, and that good sirs, is my home track
All my questionable mods will be undone as to not have some one try and take a potential win from me
jandjracing_58 is offline   Reply With Quote
Old 10-01-2014, 12:59 AM   #234
Junior Member
 
Join Date: Mar 2013
Location: Flower Mound, TX
Posts: 216
Total Cats: 22
Default

Proposed 2015 Tire Rules.
nasaforums.com • View topic - 2015 Proposed Tire Rules (TTB-TTF)

Sticky tires much higher points.
R6, R7, SM7 same as R6 was.
RR now 2 points less.

Could that make a points based TTE Miata on RRs with an aftermarked ECU and a big front bar possible?
EricJ is offline   Reply With Quote
Old 10-01-2014, 09:35 AM   #235
Elite Member
iTrader: (4)
 
Join Date: Sep 2006
Location: Charlotte, NC
Posts: 2,856
Total Cats: -4
Default

Is the R7 appreciably better than the R6? If so how can they be the same points?

Nice to see the BFG penalty reduced but jeez if they aren't basically forcing people to run R7s. 22pts for A7 means no autocross tires for you!
Efini~FC3S is offline   Reply With Quote
Old 10-01-2014, 09:35 AM   #236
Junior Member
iTrader: (1)
 
Join Date: Feb 2012
Location: Hagerstown, MD
Posts: 140
Total Cats: 0
Default

Could that make a points based 1.6 on RR competitive in E? Base weight of 2182... I don't even know if I can achieve that, I might have to quit bodybuilding.
ericwh is offline   Reply With Quote
Old 10-01-2014, 09:43 AM   #237
Moderator
iTrader: (9)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, FL
Posts: 13,394
Total Cats: 1,016
Default

Helium-filled tires.
sixshooter is online now   Reply With Quote
Old 10-01-2014, 02:55 PM   #238
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 13,367
Total Cats: 810
Default

If you guys think a sub-2600lb car will ever be competitive in E again, you learned nothing from RA.
Savington is offline   Reply With Quote
Old 10-01-2014, 08:59 PM   #239
Junior Member
 
Join Date: Dec 2012
Posts: 67
Total Cats: 2
Default

Quote:
Originally Posted by Savington View Post
If you guys think a sub-2600lb car will ever be competitive in E again, you learned nothing from RA.
Well, that's certainly true at high-speed tracks. I think at a smaller, twisty track, Eric, Chris, and I would have been all over the RX7.

Really the issue comes down to the way the rules are written. Heavy cars don't corner as well as light ones, and to correct for the lap time difference, they get a modifier on their class weightower ratio, to allow them more power. While this makes the lap time equal, it makes heavy cars achieve their lap time differently than small cars - in the straight vs in the corner. This also means that heavy cars benefit at tracks with a lot of straight, vise versa at tracks with a lot of corners.
speedengineer is offline   Reply With Quote
Old 10-01-2014, 11:48 PM   #240
Junior Member
iTrader: (1)
 
Join Date: Aug 2013
Posts: 224
Total Cats: 13
Default

Jason thats true. But IMO its still a bit biased towards the heavier car if driven and setup well.
This new proposed limit of only getting 7 points back for tire size is yet another jab to miatas running anything other than PTE. we lose 3 points...
circuitmstr74 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
elesjuan's mediocre 95 Miata adventure (google fiber edition) elesjuan Build Threads 8 02-16-2016 09:36 PM
Noob Supercharger Build Blog zazzy Supercharger Discussion 7 10-01-2015 02:09 PM
Annoying little leaks AlwaysBroken Engine Performance 5 09-06-2015 01:53 AM
Who is into adventure games? Reverant Insert BS here 15 10-27-2010 08:58 AM


Tags
nasa, pte, tte

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 On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 08:44 PM.