View Full Version : Would larger dia wheels affect 0-60 time ?
hellspawn
29-07-2003, 19:26
I am running the standard wheels on my bezza cupra, and have recorded quite a low 0-60 time, i know a lot of people here don't quite care for 0-60 times, but i have seen that 2 people recorded the same times with propper timing gear 6.6 sec.
But I have with m8's recorded times a little quicker, the best I got 6.1 sec, and on the day my brother got 6.7 in his standard Tip-R, and tbh thats pretty much on the money, for whats quoted for them.
So as this was not done with propper timing gear i can't say its offical, but would say it may only be a few points of a second out if it was.
Anyway saying that times right, and i go for 17" wheels to fit the bigger brakes, will it slow the 0-60 time down ?
yes
you will have slightly longer gearing.
Even if you go up & keep the ame diameter, the heavier wheel/tyre combo would probably make you lose some time.
I sort of disagree. ;) Yes bigger wheels means longer gearing (It affectively changes your final drive ratio), but on a chipped Ibiza this can be a good thing, as a longer 1st gear makes it slightly easier to get the power down without spinning like mad, and with normal wheels you have to take 2nd right up to the red-line to reach 60 and at this point the turbo has run out of puff. The longer ratio means that you reach 60 at slightly lower revs meaning that the turbo has slightly more puff left.
So, I actually think that 17" wheels (Assuming they are lightweight) can actually help the average driver get a good 0-60 time, but we are probably talking about less than 1/10 of a second. The rolling radius on my 205x40x17 tyres is only 2% more than my original 195x45x16 tyres.
Cheers
Ben
so running 15's on my cordie instead of the stnd 16's will increse my accellaration?they are wider than stnd (6.5j)so better grip also?
I am speaking from experience here:
YES, they slow down acceleration quite a lot. They also reduce your fuel economy and throw out the speedo due to the larger rolling radius and affect the car's handling for the worse.
I have returned to standard size wheels for the above reasons, but keep the 17's for looking good when I want to :D
Originally posted by jason
so running 15's on my cordie instead of the stnd 16's will increse my accellaration?they are wider than stnd (6.5j)so better grip also?
If the rolling radius is smaller, then yes, but top end will suffer
Originally posted by Garth
I am speaking from experience here:
...for looking good when I want to :D
I thought that's why you got that blonde wig and implant package?:confused: :p :D
Originally posted by edc
I thought that's why you got that blonde wig and implant package?:confused: :p :D :rotfl:
Yes... but the car attracts the boys to me first, so that they can get a good look at the wig and boob combo!!
NOT! :uzi:
Originally posted by Garth
:rotfl:
Yes... but the car attracts the boys to me first, so that they can get a good look at the wig and boob combo!!
NOT! :uzi:
Some say if you got it flaunt it, if not get it then flaunt it:D
ps - did you seel the local news about that scuffle outside central station? 5 arrests from what was meant to be 150 strong fight! I thought that was a normal saturday night in Newcastle:p
with smaller wheels you would go quicker but your top speed would suffer
I to am speaking from experience. :) Yes everything you have said makes sense providing that the 1st gear and/or final drive ratio was at its optimum point already, however most powerful car tend to have a 1st gear that is roughly half way between the Ibizas 1st and 2nd gear.
To be honest I've had the standard 16"s on my Ibiza for the 1st year, and then 17"s for the second year, and in that time I have done quite a few 1/4 miles and 0-60's and theres been no noticable difference in my times. However, with regard to handling I have found that the 17's are MUCH better... the lower profile makes the ride harsher but also the car suffers from less tyre roll in the corners thereby giving more overall grip.
Cheers
Ben
bth i have noticed a bit more lean mid bend,i presume this is a combination of soft ish springs and a higher tyre profile,195/45/15's?don'think so,16's when funds allow :cheers:
Dormouse
30-07-2003, 16:15
You get less deflection in a larger radius wheel with like for like overall wheel / tyre profile. Thus you may actually end up going quicker off the line with a larger rim to reduced rolling friction.
However, having said that, the momentum to get the higher unsprung weight moving is more so that slows you down! :D
As has also been said the gearing is affected (look at point 1 - it's detremental for a larger rim)
Swings and round-abouts. At the non-pro level we are talking about going from a 16 to 17 rim for 0-60's (which IMHO is possibly the worst way to compare cars) is hardly going to make a difference.
Cheers
Dor.
Shock_Xe
30-07-2003, 16:52
I didnt notice any difference In fact when i tried a run with the 17's on on the same place and with the same gear i got 6.4 instead of 6.7, granted the surface was a bit gravely but I think the wider tyres helped with grip!
ibizacupra
30-07-2003, 17:04
Originally posted by Shock_Xe
I didnt notice any difference In fact when i tried a run with the 17's on on the same place and with the same gear i got 6.4 instead of 6.7, granted the surface was a bit gravely but I think the wider tyres helped with grip!
60mph being determined by what?
Shock_Xe
30-07-2003, 17:56
the one u were at in landough
ibizacupra
30-07-2003, 18:17
Originally posted by Shock_Xe
the one u were at in landough
Oh...
One that says 6sec 0-60 for me.... NOT
Its just not accurate enough... Accelerometer based.
GPS timing gear is what I got my measurements off.. VBox Racelogic (PVW's stuff)
I did'nt find the Llandow (sp) kit anything like accurate.
Bill
Shock_Xe
30-07-2003, 18:48
nope totally agree
http://homepage.mac.com/luapy/tyresize2.jpg
Due to the increase in un sprung mass, and also rotational inertia you will lose some time.
But
You may feel quicker due to the increase increase in the rolling radius thus spining less time to cover same distance. but in most cases ur not.
Remember for every kilso saved on un sprung mass is the eqivelent of saving 15kilos of sprung mass:eek: