WB6HRO Posted January 30, 2007 Share Posted January 30, 2007 I am getting ready to run in TTA and was wondering what tires people are running in TTA? The Kuhmo 710's I have been running in HPDE are to wide 315 on the rear so do people run the 285's on the rear and 275's on the front. The Hoosier R-6 is available in 275 for the front and 295 for the rear which would seem the most logical choice? Joe Quote Link to comment Share on other sites More sharing options...
tom97ss Posted February 1, 2007 Share Posted February 1, 2007 if you dont have any other mods then yes 295's hoosiers will work at 17pts . this will leave you 2pts to mod Quote Link to comment Share on other sites More sharing options...
kbrew8991 Posted February 1, 2007 Share Posted February 1, 2007 Hoosiers are wider than thier stated size, plus they're a decent compound, making them almost a spec tire depending on how your point play out Quote Link to comment Share on other sites More sharing options...
L98Terror Posted February 16, 2007 Share Posted February 16, 2007 I may run the NITTO Nt-01 315 in the rear +5 for Nitto & +4 for size increase = +9 The only other choice I see is running a Hoosier 295 Quote Link to comment Share on other sites More sharing options...
trackboss Posted February 16, 2007 Share Posted February 16, 2007 I am not following the 17 points addition for these tires. It says in the rules that the base class tta tire is 295. Am I missing something here? Quote Link to comment Share on other sites More sharing options...
National Staff Greg G. Posted February 16, 2007 National Staff Share Posted February 16, 2007 The base class for the C5 Z06 is TTA*, so the car starts with 7 points. The Hoosiers add 10 more points, leaving two points for other mods. Quote Link to comment Share on other sites More sharing options...
trackboss Posted February 16, 2007 Share Posted February 16, 2007 Where do the +7 come from? How about a regular C5 based in ttb? Can one just immediately bump to a and start with the 295's? I'm just trying to understand the classing. thanks Quote Link to comment Share on other sites More sharing options...
kbrew8991 Posted February 16, 2007 Share Posted February 16, 2007 your tire size is always tied to your base class, even if you mod an "H" car all the way up into "A" in S/U/R all bets are off Quote Link to comment Share on other sites More sharing options...
National Staff Greg G. Posted February 16, 2007 National Staff Share Posted February 16, 2007 Where do the +7 come from?How about a regular C5 based in ttb? Can one just immediately bump to a and start with the 295's? I'm just trying to understand the classing. thanks A "regular" C5 is base classed in TTB*, not TTB. It also has 7 points to start. There would be no benefit to "jumping" to TTA to start with 295's. TTB allows 265's. The extra points to get up to 295's would cost 7 points. So, that would leave 5 more points (7 +7 = 14) before bumping to TTA. Quote Link to comment Share on other sites More sharing options...
trackboss Posted February 16, 2007 Share Posted February 16, 2007 What I don't understand is a C5 with a Z51 package is required to start in A. Then if the springs/shocks/swaybars are upgraded more points must be added. A C5 with no Z51 package to begin with can start in B, run the exact same suspension upgrades, and be left with more points to modify. Essentially, a base C5 can be modified further than a Z51 package car. When both are maxed out in A class the car that started with the Z51 package will be handicapped. That makes no sense to me unless I am reading something wrong. For those that don't know, the Z51 package is not all that sporty, and the Z06 suspension only has a slightly stiffer rear spring and upgraded swaybars which again is not a huge improvement. Quote Link to comment Share on other sites More sharing options...
National Staff Greg G. Posted February 16, 2007 National Staff Share Posted February 16, 2007 What I don't understand is a C5 with a Z51 package is required to start in A. Then if the springs/shocks/swaybars are upgraded more points must be added. A C5 with no Z51 package to begin with can start in B, run the exact same suspension upgrades, and be left with more points to modify. Essentially, a base C5 can be modified further than a Z51 package car. When both are maxed out in A class the car that started with the Z51 package will be handicapped. That makes no sense to me unless I am reading something wrong. For those that don't know, the Z51 package is not all that sporty, and the Z06 suspension only has a slightly stiffer rear spring and upgraded swaybars which again is not a huge improvement. A C5 that came with the Z51 option package, that has the Z51 parts replaced with better ones will start in the C5 (w/o Z51) base class of TTB*, and then mod up from there. If you take all of the points for the Z51 package, and add in the 7 points for the difference in 265 vs 295 tire size, and then factor in that if a driver wants to run 305's or 315's that it is 2 points cheaper to start in the TTA class, there is a benefit for drivers that want to run their OEM Z51 package for being in TTA--Just believe me on this one. We purposely have given Vette owners a few options to choose from so they can optimize their own car, as they see fit. If a driver feels that it's better to get rid of the Z51 parts and upgrade from there, that is his choice. Quote Link to comment Share on other sites More sharing options...
trackboss Posted February 16, 2007 Share Posted February 16, 2007 Ok, that sounds fair. I'll look into it. Gets pretty confusing. When is the online calculator going to be running? That hopefully will make things easier. thanks, -V Quote Link to comment Share on other sites More sharing options...
RAFTRACER Posted February 17, 2007 Share Posted February 17, 2007 What I don't understand is a C5 with a Z51 package is required to start in A. Then if the springs/shocks/swaybars are upgraded more points must be added. A C5 with no Z51 package to begin with can start in B, run the exact same suspension upgrades, and be left with more points to modify. Essentially, a base C5 can be modified further than a Z51 package car. When both are maxed out in A class the car that started with the Z51 package will be handicapped. That makes no sense to me unless I am reading something wrong. For those that don't know, the Z51 package is not all that sporty, and the Z06 suspension only has a slightly stiffer rear spring and upgraded swaybars which again is not a huge improvement. A C5 that came with the Z51 option package, that has the Z51 parts replaced with better ones will start in the C5 (w/o Z51) base class of TTB*, and then mod up from there. If you take all of the points for the Z51 package, and add in the 7 points for the difference in 265 vs 295 tire size, and then factor in that if a driver wants to run 305's or 315's that it is 2 points cheaper to start in the TTA class, there is a benefit for drivers that want to run their OEM Z51 package for being in TTA--Just believe me on this one. We purposely have given Vette owners a few options to choose from so they can optimize their own car, as they see fit. If a driver feels that it's better to get rid of the Z51 parts and upgrade from there, that is his choice. At the point where I am taking points for upgraded pieces from options, you can bet your hiny that I will be taking the points and using a whole lot better components. On a Z51 car if you are taking points for springs,shocks,sway bars, then you could have these components updated to components that will make a significant speed differential, far greater then the optional Z51 pieces. Greg , was a FRC (which came with Z51 only) , ever researched to find out what a "standard" or base Corvette was in the years '99 and '00 ??? Can a FRC be stripped of all of its Z51 components and be considered base C5 =TTB* ?? Quote Link to comment Share on other sites More sharing options...
trackboss Posted February 17, 2007 Share Posted February 17, 2007 RAFTRACER, did you ever get my pm from several months back? -V Quote Link to comment Share on other sites More sharing options...
National Staff Greg G. Posted February 17, 2007 National Staff Share Posted February 17, 2007 Greg , was a FRC (which came with Z51 only) , ever researched to find out what a "standard" or base Corvette was in the years '99 and '00 ??? Can a FRC be stripped of all of its Z51 components and be considered base C5 =TTB* ?? Chevrolet Corvette C5 (inc. FRC w/o Z51) TTB* 3246 Cheverolet Corvette C5 (all w/ Z51) TTA 3173 Danny, those are the C5 listings in the current rules. The "(inc. FRC w/o Z51)" was put in there to describe a Z51 stripped FRC. (we both know that there isn't such thing as an FRC that didn't come with the Z51). So, the answer is yes. But note that the curb weight listing for weight reduction purposes will be 3246 lbs, like the standard C5. Quote Link to comment Share on other sites More sharing options...
RAFTRACER Posted February 17, 2007 Share Posted February 17, 2007 Thanks, Greg..... Coming to Mid-Ohio anytime before Nationals ??? Quote Link to comment Share on other sites More sharing options...
National Staff Greg G. Posted February 19, 2007 National Staff Share Posted February 19, 2007 I'm not sure that I'll be able to get out there until September. I wish that I could, though. Quote Link to comment Share on other sites More sharing options...
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