Got a track related question? I'll try to answer.

[redlined600]

Originally Posted by OkieSnuffBox

You may want to double-check this year's rules.

I thought last year it was changed to "You can only run E85 if it comes from the factory as a Flex Fuel, or is stated in the manual you can run E85"

Looks like tt rules still state any retail e85 under no points mods. unless I'm missing something.

[OkieSnuffBox]

Ok cool. I just read through as well and didn't see any gotcha's.

I could have been imagining that change, or maybe it was an SCCA change to Auto-X rules.

EDIT: yep it was the SCCA, sorry for the mixup on my part:

Street and Street Touring® category vehicles will use fuel which is “Federally
approved for use on public highways.” This includes the pump fuel
known as E85, but does not allow racing-type fuels which are available at
service station pumps. Fuels comprised of more than 15% ethanol may
only be used when specified by the manufacturer (e.g., in the owner’s
manual for flex-fuel vehicles).

[ka-t_240]

Originally Posted by CSG Mike

The car was underclassed in TTD to begin with, IMO

You think it should be in TTC? What would it take for an NA BRZ to actually compete in that class?

[CSG Mike]

Originally Posted by ka-t_240

You think it should be in TTC? What would it take for an NA BRZ to actually compete in that class?

I always thought it should be a TTD** personally.

I think I could build a class winning TTC BRZ, given the right budget and freedom, along with the requisite driver. I've assisted in many TTD builds, and the ones who have been willing to spend the funds are *COMPETELY* dominant within their regions. That may have been a contributing factor to the changes...

Short version: good dampers, brakes, appropriately sized tires, header, tune, and weight reduction if available (varies by driver and setup, whether the car is caged or not, etc.)

[Uplink]

Originally Posted by ka-t_240

You think it should be in TTC? What would it take for an NA BRZ to actually compete in that class?

Honestly, depending on the track, might not need too much at all.


For reference, in bone stock trim + 245 Direzzas and PFC08 pads in HPDE Instructor groups, I'm 3-5 seconds from a win or podium at Thompson according to the TTC NASA NE times. Wouldn't take more than a better set of tires & brakes and maybe a little more downforce to fix that.



Conversely, on the Glen where the top 3 cars are M3's with crazy legs, I'm 5 seconds off podium but 10 from first. There it would depend on how much power to weight you can adjust. The 9 corners simply aren't enough to make up for how long you can put the pedal to the floor on a track that big. (Yes, there are 11 'corners' but the esses and 4 are flat out so there's nothing really gained by a nimble car over a powerhouse.)

[ka-t_240]

Originally Posted by CSG Mike

I always thought it should be a TTD** personally.

I think I could build a class winning TTC BRZ, given the right budget and freedom, along with the requisite driver. I've assisted in many TTD builds, and the ones who have been willing to spend the funds are *COMPETELY* dominant within their regions. That may have been a contributing factor to the changes...

Short version: good dampers, brakes, appropriately sized tires, header, tune, and weight reduction if available (varies by driver and setup, whether the car is caged or not, etc.)

I know I need to loose points to make TTD, I need to debate if I want to spend the money for some of it or just deal with it and go to TTC. Sourcing a trunk is part of it as I have a BRZ limited.

Car currently is not caged. I have been looking into a 4 point roll bar with a seat/harness/hans combo.

Current Setup:

• 17x9 RPF1 w/ 245 RE71R
• Tomei El Header, stock OP, Berk Catted Front, Invidia Catback, Grimmspeed Crank Pulley and Intake. OFT w/ E85 tune.
• RCE T2, RCE F/R Sways, Perrin Steering lockdown, SPC RLCA,Whiteline subframe and diff inserts and rear endlinks
• BRZ Limited Trunk
• Debating 4.56 Final Drive

What I need to Ditch to make Points:
Intake, Crank Pulley, Rear Spoiler, RLCA/Endlinks, Strut Bar

[Uplink]

Originally Posted by ka-t_240

I know I need to loose points to make TTD, I need to debate if I want to spend the money for some of it or just deal with it and go to TTC. Sourcing a trunk is part of it as I have a BRZ limited.


Car currently is not caged. I have been looking into a 4 point roll bar with a seat/harness/hans combo.
What I need to Ditch to make Points:
Intake, Crank Pulley, Rear Spoiler, RLCA/Endlinks, Strut Bar

You might wind up hamstringing yourself trying to cut points to back down a class. You're effectively picking handicaps to 'make weight' in a class that other cars could have added mods to get to.


A good baseline for your decision could be to see what times you're running on tracks with your current setup and compare them with the results sheets from TTC/D. If you're not crushing D don't drop a class. If you're somewhat competitive in C maybe you could look to max out mods for that class.

[ka-t_240]

Originally Posted by Uplink

You might wind up hamstringing yourself trying to cut points to back down a class. You're effectively picking handicaps to 'make weight' in a class that other cars could have added mods to get to.


A good baseline for your decision could be to see what times you're running on tracks with your current setup and compare them with the results sheets from TTC/D. If you're not crushing D don't drop a class. If you're somewhat competitive in C maybe you could look to max out mods for that class.

I will be running with NASA Central. One Track I am about 6 seconds off TTC, and should be 1-2 for TTD. The other I around 1 second off TTD lap record, and there has not been a TTC car, and then then I have one new track on the list that I have no seat time at.
NASA Great Lakes runs a couple of the same tracks, but their times seem to be way out of date.

Intake, Crank Pulley, RLCA/Endlinks, and spoiler make minimal performance difference. I can adjust the camber by raising the car a bit which will also allow me to use the factory endlinks in the back or adding the Whiteline camber bushings.

[CSG Mike]

I love this discussion.

Carry on gentlemen.

[redlined600]

IMO all the Midwest tt-d records I could fine are either not updated or really weak (which makes me think they just aren't updated).

[Pat]

Originally Posted by CSG Mike

I love this discussion.

Carry on gentlemen.

This.
I'm considering TTD for next year. But it will depend, in part, what it takes to keep the car in TTD.

[VADERR]

Originally Posted by Pat

This.
I'm considering TTD for next year. But it will depend, in part, what it takes to keep the car in TTD.

About 19 points.

[Icecreamtruk]

Not related to autocross but rather for time attack. I was in the same dilema of finding myself at the very bottom of a class. I was undecesive of what to do, drop a class by handicapping myself, or maxing out current class. When I checked the times I realized, that my current times, that were near bottom of my current class were only middle of the pack of the previous class. So I decided to max out current class (exhaust, drop-in filter, tune, brakes, shocks, 100TW R compounds). Competition starts in april, lets see if it pays out (will be able to tell as soon as they open the tracks, since I will practice before competition day this time around).

[enivid]

Since this might be the very last year of TTD/C and for sure TTB, I would be cautious about buying new parts since most of those rules could be gone in TT4/TT5.