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Old 07-25-2008, 11:15 AM   #1
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Default 17.5 Rubber Tire on Carpet - Any track/club run it?

This is not meant to be a "foam only on carpet thread".

Our local racers are debating classes for the upcoming carpet season. Some are suggesting a 17.5 Rubber Tire class. Im not sure Ive seen or heard anyone running such a class. 13.5 seems to have become the defacto standard for rubber tires on carpet. Is anyone running 17.5? If you are do you also run a 13.5 class? I think our desire is to run only one rubber tire class.

Just curious about what seems to be working well for others.

Thanks...
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Old 07-25-2008, 11:26 AM   #2
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The KC folks are running it at Fastlane. They ran 13.5 when I left, but switched to 17.5 to accommodate the track size, so I joined then during a recent visit. I'd be lying if I said I loved it. You had to drive a lot more strapped than with 13.5. You barely had to lift at all. I only ran it two days, but I kinda thought it sucked. Maybe that's because I was sucking, though. :-D

I hear there might be a few guys running this class in Vegas. :-O
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Old 07-25-2008, 12:12 PM   #3
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We are running it here in Omaha. Plus, the 17.5 is the new stock motor, so I hear....
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Old 07-25-2008, 12:15 PM   #4
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I think it will depend on what your average level of racer is. If your field is very deep with experience, it might be too slow. If your split 50/50 or better of 1 or 2 year racers or newbies, the 17.5 will be the better choice.

Last year we ran a 13.5 rubber class. I switched to a 17.5 to help me smooth out a little. I ended up smoking about 95% of the field. No matter what people say, it will make for better racing across the board. An example is VTA racing. Cars are much more drivable and easier to race door to door without making a big mess.

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Old 07-25-2008, 12:22 PM   #5
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Our Rubber TC class has grown since we announced that we would be running 17.5 instead of 13.5 this starting this fall. We've had a few guys start running the 17.5s over the past two weeks and everybody seems to like it so far, not so hair raising to drive with a little less horsepower. Should also make it easier for the newbies, 13.5 has gotten pretty fast to get started with. Also falls in line with ROAR classes, 17.5 = Stock & 13.5 = Super Stock.

Racing should be a lot closer with a little slower speeds.

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Old 07-25-2008, 12:27 PM   #6
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We are running 17.5/27T rubber tire on carpet here in Nashville as part of our indoor/outdoor Trans-Am class. We specify the HPI vintage tire/wheel combination and allow either 6-cell NiMh or 2-cell LiPo. Minimum weight is 54 ounces (1531 grams). Small rear-deck spoilers are allowed but no wings. The class is growing very rapidly in part because we are working hard to keep costs down. Rubber tires seem to last longer on the carpet and simplify the setup issues for newcomers because you don't have to reset the droop as the tires wear down.
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Old 07-25-2008, 12:36 PM   #7
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Here we are running in winter on carpet and summer asphalt, both rubber. Class is allowing 13.5 motor 5cells(LiPo not allowed) and minimum weight is 1400g. Not so fast and quite much fun. Tyre wear for me is minimal.
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Old 07-25-2008, 12:42 PM   #8
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Quote:
Originally Posted by or8ital View Post
This is not meant to be a "foam only on carpet thread".

Our local racers are debating classes for the upcoming carpet season. Some are suggesting a 17.5 Rubber Tire class. Im not sure Ive seen or heard anyone running such a class. 13.5 seems to have become the defacto standard for rubber tires on carpet. Is anyone running 17.5? If you are do you also run a 13.5 class? I think our desire is to run only one rubber tire class.

Just curious about what seems to be working well for others.

Thanks...
That is one of the bigger classes at my track. There is a 17.5 class and super stock 13.5 class. Also the IIC has a 17.5 rubber class. It's a popular class a lot of places.
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Old 07-25-2008, 12:56 PM   #9
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Looks like the "trend" is go stock rules for RT.........but it's still early.
My observastion from last winter was the two classes (13.5 RT & 17.5FT)were weak on entries and combined under the assuption the RT cars needed the motor advantage to overcome the lack of traction......rubber died hard...the 17.5 FT kept going...........
Best thing is to keep talking at THS and set up what you feel you want to run..........In all reality racers are renting the track for the afternoon........make something up , allow others to join in , Have Fun
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Old 07-28-2008, 05:23 AM   #10
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The slower the motor, gets the racing closer without a doubt.

If a few pro's are put in with the new guys, the pro's can let the new guys tail them for a few laps. Straight away you are teaching the new guys how to keep up and because the cars are slower, chances are you are making less mistakes/breaking.

Downside is it might be too slow for the more experienced...
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Old 07-28-2008, 08:05 AM   #11
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We are going to be running this combo this season at our track, and from the two practice days we've had this month the 17.5/Rubber combo is only .6 seconds slower than the 13.5/Foam cars per lap. We were surprised just how fast the cars were. No one had a 17.5/foam car to test. And to help combat low / mixed entries we are going to combine the 17.5 foam and rubber cars into one heat if the turnout is low for each. Each driver will get a prefix in front of their name. GTF for 17.5/foam and GTR for 17.5/Rubber.
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Old 07-28-2008, 08:14 AM   #12
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As Syndrome mentioned, we run 17.5 rubber here in KC. Seems no better/worse than any other TC class to me. Its far more controllable than 13.5 rubber, and there are a lot less 'white knuckle' moments. We had a few cases were we ran the 17.5 cars with the 13.5 cars, and the only place the 17.5 cars lost out was on the straight. And much of that was made up in the infield, where the 17.5 cars had a lot less wheel spin and push into the corners. There was a little debate, but eventually we settled on 17.5 for the rubber class, leaving 13.5 for the foams.

As far as I know, this is what the local guys who are planning on running rubber/carpet are going to be running this carpet season.
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Old 07-28-2008, 08:55 PM   #13
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As Tim Ski mentioned in an earlier post, we are going to start running 17.5 for our Fall Points Season here in Omaha and several of us have been running them for a couple of weeks now. The 17.5, IMO, is very easy to handle and seems to be smoother throughout the course compared to 13.5.

The guys that ran 13.5 last week only had a slight advantage on the straight, but everywhere else, the 17.5 was better. We had a mixed group of 17.5 vs 13.5 in the A-Main and 17.5 took top 3 while the 13.5 guys finished 4th and 5th.

I think this will make for very good, close racing with the 17.5's. Heck, 2nd-4th qualified less than a half second from each other!!

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