[ploney]

Originally Posted by idrivesti

I was also concerned about gearing so lets do a little comparo: the width of the V710 off of the car is 10 1/4 inches and the height is 24 5/8 inches at 40 psi. What are your 275 Hoosiers?
Of course none of this could matter as the V710 is supposedly faster on heavy, camber challenged cars.

On a side note I was able to get 1.2 degrees of negative camber on all four corners but no more. What is everyone else getting on their stock setup.

Cool, on the 285's, with my +52 volks, those will be my next tires.
Currently, I have some 245-35-18 710's(24 runs on them now) I need to burn up first.
El Toro ProSolo this coming weekend will help burn them up for sure!!

1.2 Wow. Was only able to get -.8 on each side.
How measured?

What tricks did you employ?

I loosened both bolts, found the max. position of the adjuster bolt, used a C clamp(around the back of the strut and against the cast portion) to hold the max camber, and tightened. Then I did a tape measure toe adjustment back to zero toe.
In the end, only -.8 camber each side.

[idrivesti]

I had my alignment done at a shop so I cant verify my #'s. I think someone locally has a gauge so I will verify later.

[waktasz]

Originally Posted by idrivesti

I was also concerned about gearing so lets do a little comparo: the width of the V710 off of the car is 10 1/4 inches and the height is 24 5/8 inches at 40 psi. What are your 275 Hoosiers?
Of course none of this could matter as the V710 is supposedly faster on heavy, camber challenged cars.

On a side note I was able to get 1.2 degrees of negative camber on all four corners but no more. What is everyone else getting on their stock setup.

They are 25.2" tall. I'm not sure if I believe that the 710 is faster. Everyone I talk to says they are slower but wear better than the Hoosier.

[idrivesti]

Ok so no rubbing issues at all.
I'm not sure that the tire is the best fit for the car. I had to run 47 PSI up front to keep them from rolling over and that may be fine because the grip was still good. I am just wondering if it is too tall because of all the roll over. But that could also be because this car needs shocks and a huge stiff front sway bar really really bad. I was at Wendover and the course was highly transitional but I was not impressed. My next event is on asphalt and hopefully I will have better luck there otherwise it's off to STU for me.
Maybe Ploney can chime in and tell us what he thought of his 245/35/18 V710's.
On a side note I put on my stock street tires and was only 1.5 seconds slower than the V710's. In my B-stock RX-8 I was over 3 seconds faster at Wendover on V710's versus Kumho MX's. But on that day it was a little warmer than yesterday. But ultimately I think this car will be more competitive in STU versus A-Stock.

[waktasz]

Too tall? The 285/30s are super short. Shorter than 275/35s. I'm also surprised you weren't much faster on your R-tires. I was faster than the STU prosolo national champ on Saturday with my AS setup. Granted he was on skinny wheels compared to his serious race setup, but it just goes to show there is speed in this car, even with crappy ol me driving. We're planning on going to the 285s for our second set of tires this year. FYI, we were running 32 psi cold in our Hoosiers. 47 is way too much I think for maximum grip, rollover or not.

[idrivesti]

Too tall is probably not the best description. Maybe too bunched or too fat. Kind of like people stuffing 285 or even 295 Hoosiers on 8 inch RX-8 rims and there was too much slop and the 245's just fit better. I don't know yet and probably wont know until this car gets shocks and a big front sway.
I totally disagree about pressures the right amount is when the rollover is acceptable and grip is still good. Hoosiers usually require less psi than V710's. In my RX-8 I ran 40psi up front and that is about what most of the top level drivers run their V710's in B-stock.We ran 24 psi in the Lotus Elise I ran at nationals last year on Hoosiers. You really can't compare the 2.
I don't know where I saw it but I'm sure you saw that picture of the Subaru that was about to rip its tire off of its wheel under heavy steering, they obviously didn't have enough psi.

[waktasz]

I guess without a pyrometer it's hard to tell. I've never ran the Kumhos so you are more of an expert in that field than I. I'd be interested to know if your times drop significantly if you get new shocks. There aren't any out yet and I don't plan to upgrade mine anyway.

[idrivesti]

Originally Posted by waktasz

I've never ran the Kumhos so you are more of an expert in that field than I. I'd be interested to know if your times drop significantly if you get new shocks.

No, No, I am far from a Kumho expert. I am just your average autocrosser trying to figure this car out.
From what I have seen in the past shocks make the most difference on softly sprung cars. I have no idea what the spring rates on this car are but it feels nice and soft and the problem is one of the things I like most about this car is its ride. In the end I think that shocks will make a big difference on this car.

[wrxpappy]

I don't know about those pressures. I know I was on 275/40's and 8"s but my car felt better and better the lower I went. I ended up at 37f and 35r (low enough, I wouldn't have gone lower). I wish we had thought to have you drive my car. I know I went faster the lower pressures I ran. The last run the car finally felt drivable, but of course, I had to throw it away going too fast into that top section. Usually you can beat me by 1 or 1 1/2 seconds in my car so I wish you had tried some lower pressures just to see what happened. I think you could have put my car down around 61.0.

(edit)On second thought, could the big rollover be the lack of a big front swaybar?

[ploney]

I will chime in more later.

Pic of the justification for a bar


Photo: IMG 7855 | ProSolo El Toro album | Makofoto | Fotki.com


Me ahead of an 07 on 275-40's Only the 4th turn too.

[maron10]

It looks like we may be able to fit 295 without any issues, Goodie goodie

[thunderbird]

Originally Posted by wrxpappy

I don't know about those pressures. I know I was on 275/40's and 8"s but my car felt better and better the lower I went. I ended up at 37f and 35r (low enough, I wouldn't have gone lower). I wish we had thought to have you drive my car. I know I went faster the lower pressures I ran. The last run the car finally felt drivable, but of course, I had to throw it away going too fast into that top section. Usually you can beat me by 1 or 1 1/2 seconds in my car so I wish you had tried some lower pressures just to see what happened. I think you could have put my car down around 61.0.

(edit)On second thought, could the big rollover be the lack of a big front swaybar?

and lack of camber adjustment from the stock suspension? I used to run lots of pressure up front, even pushed into the fifties a few times to control rollover. Now I have 500 Lb/in springs, Whiteline camber plates, camber bolts and I set my street camber to about -1.5 for street and -3.5 for autocross. I also have Strano's big 32mm swaybar on my car. Its chewing up my lower control arm and sometime soon I will need to replace them, but now I have good runs at 32 psi and I amm going to experiment with lower pressures on some of the smooth asphalt tracks (like Topeka).

[Emissary]

Originally Posted by ploney

I will chime in more later.

Pic of the justification for a bar


Photo: IMG 7855 | ProSolo El Toro album | Makofoto | Fotki.com


Me ahead of an 07 on 275-40's Only the 4th turn too.

What wheels are you running in that picture?

[ploney]

idrivesti, was your car doing this on the 285's ??
I found out that I could flick/rotate it and catch it nicely by the end of the event.
Emissary, I was running 5zigens FN's

[waktasz]

Needs more front swaybar

I didn't feel mine doing that Saturday, but it was cold out, and on a small dirty lot.