running 4 same-sized wheels+tires on the track?
#43
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Originally Posted by Beau
Why does JUN have 265's on their 800hp AWD Z?
Then again, I know little about JUN other than that I can't afford and thus probably don't need anything they sell, and that at one point they had a Super Lemon (sounds like my Ford tow-vehicle?) that was fast :P
#44
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Originally Posted by eeZee
Do 275/40/17 fit under the front fenders with stock suspension? In other words, can I fit those all around without worrying about rubbing fenders on a stock 06 350Z Touring?
Thank you.
Thank you.
#45
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Originally Posted by z-u-later
I'm running 275/40/17 on stock 17x8 autocross rims on all four corners (5mm spacers in front & 25mm in rear). I had to roll the rear fenders due to the 25mm spacers. My Z is also lowered over 1" but no rubbing issues. Here is a pic of my 17" autocross setup from yesterday's autocross:
#46
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Originally Posted by scotts300
A 1" spacer? E-gad. 275 is too large for an 8" wheel, and I'm sure is making your times suffer versus a properly-sized 245 or 255 on the 8".
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Last edited by z-u-later; 07-17-2007 at 04:22 AM.
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Originally Posted by dmoffitt
spoken like a true ricer...
can I see your math for how 275 vs 285 affects contact patch and rolling resistance enough to slow me down?
I wouldn't be running 275s up front if I was drag racing / only cared about straight-line speed anyway........
can I see your math for how 275 vs 285 affects contact patch and rolling resistance enough to slow me down?
I wouldn't be running 275s up front if I was drag racing / only cared about straight-line speed anyway........
no need to get aggressive here. Like i said, i SUGGEST, im here for knowledge too. I went with 285 before on the track too with the same setting and on the back straight and front straight i DID lose alot of speed. I wasnt able to achieve a faster time, ( cold be the weather) on a race track ( not drag )
There is no perfect setting for every track and every car has a different setting and such. There's always a need for a balance. I was just suggesting that wider isnt ALWAYS better.
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Originally Posted by betamotorsports
Who cares? We don't need to answer this question. You and your buddy above are making the assertion that wider tires = slower car around a racetrack. Prove it.
#49
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Originally Posted by mikhe
wider tires = faster car around the racetrack?
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Originally Posted by mikhe
no need to get aggressive here. Like i said, i SUGGEST, im here for knowledge too. I went with 285 before on the track too with the same setting and on the back straight and front straight i DID lose alot of speed. I wasnt able to achieve a faster time, ( cold be the weather) on a race track ( not drag )
There is no perfect setting for every track and every car has a different setting and such. There's always a need for a balance. I was just suggesting that wider isnt ALWAYS better.
There is no perfect setting for every track and every car has a different setting and such. There's always a need for a balance. I was just suggesting that wider isnt ALWAYS better.
This is not a critique of your driving skill. it's a simple reality that we each must face, humbly, when driving on a race track.
As for "each car being different", we're pretty much all driving the same car.
#52
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Are you trying to say wider tires = faster car around the racetrack?
On a 3,000+ lb., 300hp race car, you can't have tires that are too wide. On a 1,500 lb., 120hp race car, tires too wide can be a problem.
A wider tire was so important in that category of racing that Goodyear and Hoosier spend a buttload of money engineering a tire that gives up to 2" more width. Goodyear and Hoosier both think wider is better in the race tire world.
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Wider-is-better certainly worked for our 2005 Track that Carter piloted to a very close 2nd place in BS at the 2006 Solo Nationals.We had 285/30/18 710's on the 8" fronts and 8.5" rears.We first used 245's but could not dial out the understeer until we went to the 285's.
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We use 285 x 18" Kumho 710 on 9" fronts and 10" rears. Last year we used a smaller tire because we were required to use a narrow 8.5" wheel. the Kumho 710 tires this year are the same compound as last year so the tire is a constant. Our car is definitely faster this year due to wider tires. The driver is the same and the car is basically the same. One thing you need to consider on a road course is that the "Z" car is a momentum car. It doesn't have the torque that a V-8 Camaro has but it will corner a little faster, therefore momentum. When driving a Z the speed will be basically in your learning how to be fast smooth. I always advocate making the car handle before you spend or waste money on more engine. If you want response when you push down the fast pedal buy a corvette.
#55
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Originally Posted by tomsn16
Wider-is-better certainly worked for our 2005 Track that Carter piloted to a very close 2nd place in BS at the 2006 Solo Nationals.We had 285/30/18 710's on the 8" fronts and 8.5" rears.We first used 245's but could not dial out the understeer until we went to the 285's.
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Originally Posted by merlot350Z
If you want response when you push down the fast pedal buy a corvette.
+1...kinda wish I kept my miata to learn how to drive and handle the track, then step up to something w/ more power.
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Originally Posted by scotts300
A 1" spacer? E-gad. 275 is too large for an 8" wheel, and I'm sure is making your times suffer versus a properly-sized 245 or 255 on the 8".
Originally Posted by scotts300
285s on an 8" wheel? 255 is the recommended max on an 8" wheel, but I'm listening...
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Z-U-Later brings up a good point.It is often helpful to the reader,for posters to qualify their suggestions/opinions by stating were the info comes from....experience,testing,results etc.
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One thing people sometimes forget is that racers do strange things with their cars to meet a set of rules. Ideally a 285 width tire should be mounted on a 10" to 10.5" wide rim, but when the rules say the max rim width is 8", you and your buddies spend hours getting a 285 to fit where is doesn't belong.