Short backstory is that a screw got lodged in my back tire and I drove on it Sunday morning about a mile in total. When I got it back home there were hot spots almost the size of the front of my fist around the circumference of the sidewall. After it cooled, the hot spots had sunk in about 1/8" and the flat bottom was permanently deformed in that shape.

So today my new tires came in and after waiting about 2.5 hours in the waiting room they got them on and I was out the door $360 lighter. I got Mirada Sport GTX 215/60/R14's from my old Kumho Grand Touring's of the same specification.

First impression was that the steering was MUCH lighter, almost like if I had power steering. It's fucking awesome. However, I thought that I'd have lost alot of traction as well because of less grip. Well that's a load of shit because it's like HOLY SHIT THESE ARE FUCKING AWESOME!!!111!111111~~~

Granted, my Kumho's never let me down in dry weather except once when I slammed my brakes around a corner. That's the only time the back ever let go. They've been great tires, but now these fuckers stick like they are nailed to the road. I can't wait to get a Friday off to go play. :)

Your car needs more power!

Underinflated fronts + overinflated rears + fwd car = not very fwd like behavior

Made me O.o

Just as a note to you, front wheel drives suffer rapid tire wear with underinflation. Tires cost money.
See, higher inflation can be good for the hip pocket.

Yeah, that was when I first mounted the wheels after I bought them. I've since sorted out the inflation and such.

Rear-heavy car + soft front springs + brakes + turn = scary stuff

Hows the civil unrest brewing where you boys are?

I'm bout ready to kick an ass. Let me quote this from a friend's facebook.
"Cameron is god damnit, america is going to shit now. I liked having my money, now drug dealers and prostitutes get it. 11:04pm
- 12 Comments"

Shit like this pisses me off to no end.

We are still filled with idiots, aparently:
"Cameron is god damnit, america is going to shit now. I liked having my money, now drug dealers and prostitutes get it. 11:04pm
- 12 Comments"

I'm pretty stoked about these tires now. I did about 100 more miles on them today and drove around some backroads and the grip is amazing. However, either the sidewalls re flexingmore than the old tires, or the grip is so much better its moving the suspension in such a way that its getting into a region where it has more oversteer the more you turn the wheel into the curve. This seems to be made worse for the fact that the tires show just how soft the bushings are, so the car kinda meanders around if you move the wheel mid-turn.

It'll just be that you've got a softer compound (as evident from what you said earlier). Contact patch, and thus cornering dynamics, are effected. I'll put a hundred bucks on it.

Your car wants more power, less weight.

I got 4 of these on my car. http://www.tirerack.com/tires/tires.jsp?tireMake=Bridgestone&tireModel=Potenza+RE960AS+Pole+Position&partnum=155WR6RE960PP

Lets just say they grip so hard that the full smoke burnouts my old tires would is now just little chirps :(

Oh, and the extra rolling resistance has even dropped my average MPG i think.

2600 lbs and 100 hp is all I got. :D

2600 lbs and 100 hp is all I got. :D
So you've got 96hp per metric tonne or so. Falling a little short partner.

I got 4 of these on my car. http://www.tirerack.com/tires/tires.jsp?tireMake=Bridgestone&tireModel=Potenza+RE960AS+Pole+Position&partnum=155WR6RE960PP

Lets just say they grip so hard that the full smoke burnouts my old tires would is now just little chirps :(
Oh, and the extra rolling resistance has even dropped my average MPG i think.

So your car can exceed 186mp/h, or 300km/h for long periods of time? I'm assuming these are for when you take it to the track. ZR rated tyres are overkill, even for track cars. Bridgestones Potenza line is pretty darn good though, so you haven't gone wrong with your choice. Just a little crazy with the wallet.

Not quite taking them on the track (Car is limited to 130mph, although i swear I had it to 135 :) ) but I did take it to an open autocross event in which i did pretty smoothly for my first attempt lol

Well, pretty much your entire suspension system will be tuned based on your original tyres, and if you change them, things can be a bit odd.

I would assume simply because this is what happens most of the case, that you have softer, stickier tyres.

There are a fair few effects of this, depending on the ratio of how much softer they are, to how much grippier they are.

for one, they will need more slip angle for their optimum lateral force, and their optimum lateral force will be at higher gees, thus both the difference in loads on the tyres, and the amount that a given difference in load changes the optimum slip angle, will go up. So: your car will probably need more toe (not nescessarily static toe), in some amount. Additionally, when the suspension was first designed, they could (thats an if there, a big if) have said "right, well it's only going to deflect this much in a bump, because it can't possibly grip that hard, so we won't try to give it any more toe past here".

As to your self centering, depending again on the change of softness of the tyres versus the change of grippyness (I'm making up words here), then an element of your tyre will start providing force much earlier, and also break loose and return to neutral much earlier, as it moves through the contact patch, thus all your forces occur closer to the front of the contact patch. Since high-g self centering relies to a large extent on a moment between the kingpin axis and the cornering forces, the kingpin axis being in front, and your cornering forces headed towards it, you have reduced the moment arm, and thus reduced some high gee self centering.

If you have also got less tyre scrub/resistance/etc at low speeds, it could be that your car had less-than ackermann geometry, but the tyres are a bit more forgiving now because small slip angles do not make as large differences on softer tyres.

So you've got 96hp per metric tonne or so. Falling a little short partner.

It does get 30 mpg and handles like a go kart. It's pretty good for an engine whos only use these days is in forklifts and whatnot.

I'm a little wet for a black 87 fastback with an 88 rear and either a turboed LD9 or an LSJ with a bigger intercooler and smaller pulley. But I've got too much stuff going on and too many things I want to buy for that to be something I can get a hold of quickly. :)

Wait, AP2k, did you go through with selling the Fiero and getting a Geo Storm?

No. It went frm a Storm to finding a blown Isuzu Impulse with Lotus-tuned suspension, then the guy didn't want to buy my car, so I couldn't afford to buy the Impulse. I kinda left it there. I am possibly going to get a VUE from my parents, though, if I don't fuck up to badly in school. My dad almost has enough of them to open a small VUE dealership. :D

No. It went frm a Storm to finding a blown Isuzu Impulse with Lotus-tuned suspension, then the guy didn't want to buy my car, so I couldn't afford to buy the Impulse. I kinda left it there. I am possibly going to get a VUE from my parents, though, if I don't fuck up to badly in school. My dad almost has enough of them to open a small VUE dealership. :D

I raced a Vue. And won. Don't get a vue.

I raced a Vue. And won. Don't get a vue.

It's free, has cargo space out the ass compared to my Fiero, gets great gas milage. It's pretty quick for a 4000 FWD pound beast. I floored it to pass a guy one day and the thing took off like a bat out of hell.

But yea, I'm sure the 4-cylinder ones are quite slow. Especially the detuned Green Lines or the ones with that God-forsaken CVT.

By the way, I raced a Z71 Silverado and won, so it's not saying much. That old blown diesel work truck I raced was harder, of course I also had the stock intake on then. :D

By the way, I raced a Z71 Silverado and won, so it's not saying much. That old blown diesel work truck I raced was harder, of course I also had the stock intake on then. :D

Z71's are slow, i raced one in my dads miata ages ago and beat it. the miata had nothing for power added, just suspension, only 118 or so hp. 1.8l.

It's free, has cargo space out the ass compared to my Fiero, gets great gas milage. It's pretty quick for a 4000 FWD pound beast. I floored it to pass a guy one day and the thing took off like a bat out of hell.

But yea, I'm sure the 4-cylinder ones are quite slow. Especially the detuned Green Lines or the ones with that God-forsaken CVT.

By the way, I raced a Z71 Silverado and won, so it's not saying much. That old blown diesel work truck I raced was harder, of course I also had the stock intake on then. :D

Custom intake body = NAWSSSS?