Need help setting up 944 for Autocross

[porsche4life]

http://www.tirerack.com/tires/Spec.jsp?make=Yokohama&model=AVS+ES100&vehicleSearch=false&fromCompare1=yes&partnum=16VR5ES100&tirePageLocQty=%26partnum%3D16VR5ES100

What about those?

[962porsche]

we did a tire test on summer ultra performance tires this spring . using 2 front drive cars and 2 rear drive cars and 8 drivers . we found that the YOKOHAMO ES100 did very well for price ,sizes,lap times ,road feal, and so on . you will have a hard time with any summer tire in cold weather .

[porsche4life]

What was your best ultra performance?

[962porsche]

i can not come out and tell you at this time . i do some test driving and at this time the publishing CO. has not come out with that article . but the es100 was a good all around tire !wink wink !

[porsche4life]

LOL. Ok well I am going to check with my dads friend and see what he can do on the es100. If he can't beat tire rack I will buy em and mount em myself, we have a tire machine. Then I will go let him make money on the alignment.

I should probably get away from the alloy lug nuts too right?

[porsche4life]

Hey 962 what size sways should I go to?


Oh if you are ever passing through OK on I40 give me a shout. I owe you a steak

[krystar]

do NOT get ES100's they suck...bad..

i just got some yoko advan ad08's. this year's hottest tire. but everyone's on backorder for the 15's. so i ordered 205/16 and 225/16 instead . going on 7x16 and 8x16 rims.


yesteryear's hot contenders are now cheap. the hankook ventus RS2's are still a great tire. and they're under $100 in some sizes. also the Kumho Ecsta XS are still good.

[porsche4life]

Why do the ES100s suck?


Oh the TTOD Cobra kit car was on Ecsta. I just remembered seeing that.

[962porsche]

you could leave the stock front bar if its a 21mm or smaller as for the rear find a 24mm to 26mm bar . set the front tow in at 1/16 and camber at 2.0 , caster stock setting . rear tow and camber stock setting . run a 225/50r/15 tire size . a good starting point would be 36 lbs front and a 38 rears . cold settings . it works like this the more push (under steer) go smaller with front bar and drop air out of the tires 2 lbs at a time . and bigger with the rear bar and more air in the tires .yes get steel nuts !!

[krystar]

they're really noisy, they get mushy once they get to temp and on top of it...they just don't grip that well!

[porsche4life]

Ok I am not sure What size bars I have. They are just the stock bars(opt code 341). When you say drop 2 psi do you mean in just the front or rear, Or all 4?

I guess I don't want the M030 19mm 3 way bar in the rear?

[962porsche]

that would be just the fronts . in the rears go up in air but not more that 4 lbs + or - . we found that the es100's had the 3rd best out or the 10 brands tested for lateral performance and not that far from 1st. . in an auto-x its hard to get street tires up to temp. for competition you want to hear your tires . the change in tone is just one way you know how your tires are working and what grip your getting . find a bigger bar . in one of my 944 race cars i have a 26mm 5 way adjustable rear bar and a 19mm front with stock suspension but welt bushing up front . it runs the alignment i stated . is a loaner car now but when i run this car in atuo-x's it was a winning car in its class with v710's. the people i loan it out to use it for track days just to see what track driving is like .

[Aslet]

If you are willing to go to 205/50/15 tires (which I find gibe a better torque ratio anyways) the Falken 615 tires are real good and only ~$85 each. They are ment to be a road usable race tire that still allows you to drive in stock class. They are only 205 (stock 215), but since they are sporty, I think they are just as wide as the 215 though. I have not done any autocross on them yet (first one this Sunday), but I have done 3 DE days and really like them. They are the closest to R tires you can get, well, without getting R compound.

[porsche4life]

I am willing to go with anything that will fit on my wheels.

[krystar]

yea the azenis rt615's are a great tire. they have been outclassed though by the this year's new street tires. bridgestone potenza re11's and the yoko advan ad08's.

but the rt615's are so much cheaper now since the new tires are out.

[porsche4life]

http://www.discounttiredirect.com/direct/findTireDetail.do?pc=18501&counter=7&ar=50&rd=15&sw=false&cs=205


Hmm. Looks like I might go with these. Cheaper and free shipping.

[porsche4life]

Cant seem to find bars larger than 19mm for the rear. Lindsey sells a 19mm 5 adjustable thought for 129.

[J1NX3D]

Originally Posted by 962porsche

the 944 body cars have alot of under steer . what is needed is the smallest front bar you can find for the car and the biggest rear bar . then go with 1.5 to 2.0 neg camber in front with stock caster set about 2.2 then tow in the front about 1/8 this is for a quicker turn in . you don't tow out a rear drive car ! that is what you do to front drive cars ! a front drive car wants to lift its inside rear wheel and a rear drive car wants to lift its inside front wheel ! you want more over steer so have the rear tow and camber set at 0.0 . find some 15 inch wheels 7inch fronts and 8 inch rears a 15 inch wheel will drop the gearing down for a better accretion . then find some one with scales and balance the car .

can one do these adjustments with the stock sway bars with still good results?

[rmconner80]

Assuming you have the same width tire all around (if not, then you should) - Start with equal pressures on all four corners. Try 38-39psi "hot". You will get a whole lot less understeer and it will only cost a couple of quarters at the nearest gas station. From there, used sway bars (18mm rear, 25 or 26.5 mm fronts) would be a good cheap upgrade.

Once you get a feel for that setup at a few sessions, then you can start looking at stickier tires and alignments. Once that feels good, you can go for shocks and perhaps even tighter springs and torsion bars. Don't try to do it all at once.

I'm running the Hankook RS-2s, 225-45-16s. I like 'em!

[porsche4life]

Ya this was my second run on these tires. They are all over the place. They suck for this. They are really good all seasons. So I am going for good tires, alignment and a bigger rear bar and we'll see where that gets me.