STF posts - Page 13 - Toyota Yaris Forums

Steve35 · 02-04-2013, 07:59 PM

Nope, no big wheel spin problems for me. The car was great, could it be better? Of course.

I wish you had your data logger...

Steve

Jason@SportsCar · 02-04-2013, 08:28 PM

Quote:

Originally Posted by xnamerxx

Jason quit trying to make me setup my car to be a more hateful DD experience LOL

Daily drive the Mustang.

LSD, flywheel, 13"x9" wheels, ECU, no cats.

CrankyOldMan · 02-04-2013, 09:53 PM

Quote:

Originally Posted by ilikerice

Yes. I will be going fsp by summer. I want lsd so bad. U got a spare trans w lsd u wanna get rid of? Lol

Hell, I'm about ready to pull the trigger on LSD/gear ratios/final drive and go straight up EP. I don't plan on going national with it, and I don't AutoX to win, so being laughably un-competitive in that class is no big deal. It's just where my egg will land when I get done scrambling it.

xnamerxx · 02-04-2013, 10:05 PM

It didn't feel heavy enough to me to be solid so I'm going to hazard a guess that its hollow.

Got Z2 street tires on, I'm pretty sure there not faster than the Toyo's, but they have the best steering feel of any tire I've ever driven on, there so unbelievably sharp, definitely one of the best street tires I've ever driven on.

NJ Drive · 02-04-2013, 10:26 PM

Quote:

Originally Posted by xnamerxx

It didn't feel heavy enough to me to be solid so I'm going to hazard a guess that its hollow.

Got Z2 street tires on, I'm pretty sure there not faster than the Toyo's, but they have the best steering feel of any tire I've ever driven on, there so unbelievably sharp, definitely one of the best street tires I've ever driven on.

Thanks. I'm trying to decide if it's worth forgoing the front sway bar altogether or reinstall a smaller one.

What size ZIIs did you go with? I have a pair of 225/45/16 for the front. The Star Specs were already a great tire, can't wait to see how the ZIIs run. Pretty sure by now you've heard that the 195 Toyos aren't the only size that gets the good stuff all the way down either, according to Mr. Lugod.

xnamerxx · 02-04-2013, 10:44 PM

Well I kept the front bar for body roll reasons, I also didn't like the way the car felt running without it. The steering is really really numb without a front bar but you can get power down a little bit better. After running without it I found it was just better to run more spring in the back and call it a day.

Both the 50 and 55 get it afaik, but Lugod's in my region so I can ask him next event. From what I heard from Andy Hollis it was just those 2 sizes.

I went with the 225/45/16.

I don't expect any of the newcomers to overshadow the R1R's, even though I hate that tire with a passion it does work really well.

Jason@SportsCar · 02-05-2013, 01:24 AM

Quote:

Originally Posted by NJ Drive

Thanks. I'm trying to decide if it's worth forgoing the front sway bar altogether or reinstall a smaller one.

What size ZIIs did you go with? I have a pair of 225/45/16 for the front. The Star Specs were already a great tire, can't wait to see how the ZIIs run. Pretty sure by now you've heard that the 195 Toyos aren't the only size that gets the good stuff all the way down either, according to Mr. Lugod.

Based on the OE 24.3mm spare bar I have I believe they are solid. It has no crimp marks on the ends, and based on its size it feels to heavy to be hollow. If you can find one there are 23.3mm OE bars out there, I have one on the HP car, came from an 07' sedan.

ilikerice · 02-04-2013, 10:17 PM

Quote:

Originally Posted by CrankyOldMan

Hell, I'm about ready to pull the trigger on LSD/gear ratios/final drive and go straight up EP. I don't plan on going national with it, and I don't AutoX to win, so being laughably un-competitive in that class is no big deal. It's just where my egg will land when I get done scrambling it.

I will probably end up in SM class by the end of the year. I really wanna go turbo. I think I made my debut last year by coming in 2nd overall and now I just wanna have some fun. I don't wanna get Rcomps yet til I get an LSD though.

NJ Drive · 02-04-2013, 09:00 PM

Does anyone know if the stock front sway bar is solid or hollow?

NJ Drive · 02-04-2013, 11:21 PM

One thing I've learned is that the clock trumps 'feel' any day. I remember first running my STR S2000 w/o a rear bar. It felt weird, I had to make adjustments to my driving, but ultimately was much faster w/o it than with it. I'm still kicking myself for being stubborn at Nationals in 2010 for not removing it because I didn't think it was quicker. Never again.

xnamerxx · 02-05-2013, 12:44 AM

Well yes and no, when going over my data it always showed that I had more corner speed with a bar than without, but I had better exit speed with the bar. My setup wasn't optimized for either bar or no bar so you never really got to know for sure if bar or no bar was better. Once I figured out the spring balance it felt better and was quite a bit faster than no bar on the previous setup. I think having the extra compliance over bumps is enough to make having a front bar worth it, rather than compensating with extra stiff springs.

Just for S n G's here is data from the last event of last year.

Data from a Miata course. I suck at braking.

NJ Drive · 02-05-2013, 01:21 PM

Initially I was planning on staggering heavier in the front w/o a bar and give it a go. My wheelbase is a little longer than yours too so behavior under braking might not be as pronounced.

Your data acquisition is nice too.

xnamerxx · 02-05-2013, 02:21 PM

So the more I stagger rear roll stiffness the more liftoff/brake oversteer I get, there was a fine line from nice rotation to fwd drift car. Just having the rear spring stagger gave me enough front end accel traction that inside spin wasn't such a bad problem, I still complain about it but its mostly due to me getting back on it too soon when the front inside wheel has no load and is at a sharp angle.

Now I'm not positive this is true so take it as here-say but you can't transfer load dynamically from the left front to the right front by using stiffer springs can you can do so from the left front to the right rear and vice versa so taking load off the front by using stiffer rear springs seemed to be the way to go in getting some more front end bite. I still feel I need -4 camber to fix to get the Toyos happy but I haven't pursued that path yet.

racerb · 02-05-2013, 10:23 PM

Finally ran the Yaris in STF with the local SCCA group, was the only car in class but turned fairly respectable time. Only mods so far, 23mm UR rear bar, K&N drop-in filter, and some rock hard Goodyear Eagle GT tires.

http://www.ncrscca.com/sites/default...auto-x_fin.htm

racerb

ilikerice · 02-05-2013, 10:32 PM

good job racerb. imagine what it CAN do now.. lol.. was that just a "all my other cars are down right now, lets just run the yaris" event? or will we see more STF mods to the yaris and more/better results?

racerb · 02-05-2013, 10:39 PM

Planning on doing about everything possible to prep the Yaris to the maximum of STF rules. I have been also concidering a B-Spec Yaris, but with an earlier chassis, 2007-2008 model from one of the salvage car sites, really cheap that way. Here is one of the salvage sites I mentioned....
http://www.salvageworld.net/search.p...2009&x=52&y=11

racerb

cali yaris · 02-06-2013, 02:30 AM

Quote:

the more liftoff/brake oversteer I get, there was a fine line from nice rotation to fwd drift car.

yep. That's really fun with 300+ to the wheels. I've done some power slides that made my passengers wonder what the heck was happening.

xnamerxx · 02-17-2013, 08:18 PM

Well just wanted to add my feedback for the z2's.
I ran first session on my R1R's and second session on my z2's and I was about a second faster with my larger diameter z2 vs the R1R's. Had to go into the data to figure out why, but the limit of the Toyo's and the dunlops appear to be about the same with the z2's having a slighly higher limit, what made the Dunlops so much faster was that I was able to keep the car on the limit from the entrance of the turn to the exit.

02-05-2013, 10:23 PM	#14
racerb View User's Garage Drives: 2010 Yaris HB Blazin' Blue Join Date: Feb 2011 Location: Leland, NC Posts: 444	Finally ran the Yaris in STF with the local SCCA group, was the only car in class but turned fairly respectable time. Only mods so far, 23mm UR rear bar, K&N drop-in filter, and some rock hard Goodyear Eagle GT tires. http://www.ncrscca.com/sites/default...auto-x_fin.htm racerb __________________ racerb '86 Celica GT '87 Celica GT-S '98 Rav4L '01 Tundra SR5

02-05-2013, 10:32 PM	#15
ilikerice Drives: 2010 black yaris Join Date: Oct 2010 Location: savannah, ga Posts: 2,868	good job racerb. imagine what it CAN do now.. lol.. was that just a "all my other cars are down right now, lets just run the yaris" event? or will we see more STF mods to the yaris and more/better results? __________________ -Derrick- "Racing is important to men who do it well. When you're racing... It's life. Anything that happens before or after, is just waiting." Last edited by ilikerice; 02-05-2013 at 10:32 PM. Reason: typo

02-05-2013, 10:39 PM	#16
racerb View User's Garage Drives: 2010 Yaris HB Blazin' Blue Join Date: Feb 2011 Location: Leland, NC Posts: 444	Planning on doing about everything possible to prep the Yaris to the maximum of STF rules. I have been also concidering a B-Spec Yaris, but with an earlier chassis, 2007-2008 model from one of the salvage car sites, really cheap that way. Here is one of the salvage sites I mentioned.... http://www.salvageworld.net/search.p...2009&x=52&y=11 racerb __________________ racerb '86 Celica GT '87 Celica GT-S '98 Rav4L '01 Tundra SR5 Last edited by racerb; 02-05-2013 at 10:52 PM.

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02-04-2013, 07:59 PM	#1
Steve35 Drives: 2008 HB Join Date: Dec 2012 Location: Vancouver, Wa. Posts: 90	Nope, no big wheel spin problems for me. The car was great, could it be better? Of course. I wish you had your data logger... Steve

02-04-2013, 10:05 PM	#4
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	It didn't feel heavy enough to me to be solid so I'm going to hazard a guess that its hollow. Got Z2 street tires on, I'm pretty sure there not faster than the Toyo's, but they have the best steering feel of any tire I've ever driven on, there so unbelievably sharp, definitely one of the best street tires I've ever driven on.

02-04-2013, 10:44 PM	#6
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	Well I kept the front bar for body roll reasons, I also didn't like the way the car felt running without it. The steering is really really numb without a front bar but you can get power down a little bit better. After running without it I found it was just better to run more spring in the back and call it a day. Both the 50 and 55 get it afaik, but Lugod's in my region so I can ask him next event. From what I heard from Andy Hollis it was just those 2 sizes. I went with the 225/45/16. I don't expect any of the newcomers to overshadow the R1R's, even though I hate that tire with a passion it does work really well.

02-04-2013, 09:00 PM	#9
NJ Drive Drives: 2012 Yaris SE Join Date: Nov 2011 Location: Northern NJ Posts: 179	Does anyone know if the stock front sway bar is solid or hollow?

02-04-2013, 11:21 PM	#10
NJ Drive Drives: 2012 Yaris SE Join Date: Nov 2011 Location: Northern NJ Posts: 179	One thing I've learned is that the clock trumps 'feel' any day. I remember first running my STR S2000 w/o a rear bar. It felt weird, I had to make adjustments to my driving, but ultimately was much faster w/o it than with it. I'm still kicking myself for being stubborn at Nationals in 2010 for not removing it because I didn't think it was quicker. Never again.

02-05-2013, 12:44 AM	#11
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	Well yes and no, when going over my data it always showed that I had more corner speed with a bar than without, but I had better exit speed with the bar. My setup wasn't optimized for either bar or no bar so you never really got to know for sure if bar or no bar was better. Once I figured out the spring balance it felt better and was quite a bit faster than no bar on the previous setup. I think having the extra compliance over bumps is enough to make having a front bar worth it, rather than compensating with extra stiff springs. Just for S n G's here is data from the last event of last year. Data from a Miata course. I suck at braking.

02-05-2013, 01:21 PM	#12
NJ Drive Drives: 2012 Yaris SE Join Date: Nov 2011 Location: Northern NJ Posts: 179	Initially I was planning on staggering heavier in the front w/o a bar and give it a go. My wheelbase is a little longer than yours too so behavior under braking might not be as pronounced. Your data acquisition is nice too.

02-05-2013, 02:21 PM	#13
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	So the more I stagger rear roll stiffness the more liftoff/brake oversteer I get, there was a fine line from nice rotation to fwd drift car. Just having the rear spring stagger gave me enough front end accel traction that inside spin wasn't such a bad problem, I still complain about it but its mostly due to me getting back on it too soon when the front inside wheel has no load and is at a sharp angle. Now I'm not positive this is true so take it as here-say but you can't transfer load dynamically from the left front to the right front by using stiffer springs can you can do so from the left front to the right rear and vice versa so taking load off the front by using stiffer rear springs seemed to be the way to go in getting some more front end bite. I still feel I need -4 camber to fix to get the Toyos happy but I haven't pursued that path yet.

02-17-2013, 08:18 PM	#18
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	Well just wanted to add my feedback for the z2's. I ran first session on my R1R's and second session on my z2's and I was about a second faster with my larger diameter z2 vs the R1R's. Had to go into the data to figure out why, but the limit of the Toyo's and the dunlops appear to be about the same with the z2's having a slighly higher limit, what made the Dunlops so much faster was that I was able to keep the car on the limit from the entrance of the turn to the exit.