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Don Kadunc
Needs a Life!!!
Joined: 09/24/2003
410 Posts |
 Posted - 01/21/2010 : 17:01:28
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| Did they ever publish top speeds at the runoffs? |
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peter_zekert
Needs a Life!!!
Joined: 02/09/2003
USA
1145 Posts |
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Don Kadunc
Needs a Life!!!
Joined: 09/24/2003
410 Posts |
Posted - 01/22/2010 : 19:17:33
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| We need to demand that trap speeds are taken and published at the end of the front staight at the 2010 June sprints and the Runoffs. Segment times would also be good to have. The track is setup for segment times. A radar gun at the end of the straight is a no brainer. Also include with that data engine size and type, SIR size, tire size, weight, trans type. These are all required to determine the allowable weight for each car and should be disclosed with the times. Then the track times can be analyzed to see if the current rules need adjusting. Now everyone is just guessing. |
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johnspencer82
Needs a Life!!!
Joined: 03/16/2005
USA
440 Posts |
Posted - 01/23/2010 : 16:14:54
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for what it's worth...........
i've been on both and the 15s are in general a better deal on my 510.
my objections to 15"s in gtlite are mostly philosophical but here are some things to think about............
most racing orgs use a single wheel size as the most important performance equalizing and limiting tool in their rules arsenal.
ask yourself why we all cannot come up with some form of consensus as to this 15/13' performance question? best answer is that there is no useful amount of proper assumptions and math that can be applied. if there is a math based method for the 4% (or any number) chosen penalty, i and a lot of others would like to see it but i'm pretty sure it was and still is subjectively arbitrary.
would lite guys accept the current gt3 aero package with some arbitrary penalty? there is a class identity problem here or an inconsistency within the rules making process that doesn't allow full interchange of gt3 and lite except for power to weight. what would ff guys think of having their larger brethren ff2000 wheel package (13x5.5 vs 13x6 and 8 i beleive) applied with some arbitrary penalty?
if 15"s are more stable over the course of a race, shouldn't that mean that they fall behind in the early stages and then make a race of it with the 13" guys losing grip at the end of the race? that isn't what seems to be happening. in gt4 trim, cook, ruthroff, and others had few problems keeping 13" tires under fwd cars with approx. 15% more power.
finally, the arguments about moi, extra weight, unsprung weight, etc here are done with tunnel vision. this is about the best compromise. on the mostly smooth tracks we run on, unsprung weight can be compromised for grip. the same can be said about rotating mass and the better (way better) brake packages that can be put inside the 15"s. and on and on it goes.
spencer |
Edited by - johnspencer82 on 01/23/2010 16:22:19 |
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johnspencer82
Needs a Life!!!
Joined: 03/16/2005
USA
440 Posts |
Posted - 01/23/2010 : 16:39:53
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We need to demand that trap speeds are taken and published at the end of the front staight at the 2010 June sprints and the Runoffs. Segment times would also be good to have. The track is setup for segment times. A radar gun at the end of the straight is a no brainer. Also include with that data engine size and type, SIR size, tire size, weight, trans type. These are all required to determine the allowable weight for each car and should be disclosed with the times. Then the track times can be analyzed to see if the current rules need adjusting. Now everyone is just guessing.
don,
while i agree that knowledge is power, i would hope that you are not suggesting we take info like this and apply it subjectively. gt is supposed to be a pretty much spec chassis (ala saturday night nascar stuff; tube frame, solid rear, spec tire package(?)), power to weight formula. especially as it was just laid out in gt3. the assumptions laid out in 3 are valid in lite when mathed out to lower power to weight and when (if) applied to lite would broaden the baseline for the accuracy of those assumptions over a wider base. that would be a huge step forward in getting away from subjective judgements about performance as any discrepency (say the adjustment for non x-flow heads) would show up in both classes. larger sampling, way better chance of getting it right.
spencer |
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13 vs. 15 inch tires
