Quick question...When I install my track tires this weekend that do not have the TPMS responders in them, I assume I will get the dreaded XXX on my display. Will this impact any performance (shift points, rev limit)? Also, I thought I read that it will limit me to regular or competitive driving mode, preventing active handing off mode. Is that correct?


Thanks

 

I looked in your profile, but no info in there.

I you're running a C5 - no problem. If it's a C6, you may experience issues.

Your avatar has a C6 (and we're in the C6 section) so, is that the car you're taking to the track?

If it is a C6, what year?

What kind of track are you talking about - are you going to the drag strip or a road course?

If it's the drag strip, will you just be putting DR's on the rear and leaving your street tires with sensors on the front?

Will you be driving to the track on your track tires, or will you put them on when you get there?

Bob

 

I have an 2007 C6. I planned to just replace the rear tires and drive to the track,racing 1/4 mile. The fronts will remaing stock with sensors.

Thanks Profile update in process..

 

You will have problems with the transmission shifting correctly but if you can bring your street tires to the track it will pick up the air pressure even if the wheels are not mounted on the car. What else works for me is I put 42 psi in the front tires and for some reason it will not notice the rear sensors missing on the car. Try it out for yourself by riding around with your drag radials and 42 psi in the fronts.

 

Thanks. I'll try the 42psi trick first. I don't have the means to bring the street tires and want to avoid purchasing monitors for the track tires and then having it reprogramed everytime I switch.

 

Reprogramming is easy. There are low cost programmers that you can use to program the TPMS yourself. Takes less than 5 minutes to do including taking the programmer out of its box and putting it back in and storing again.

Bill

 

i have a 05 c6 and i put my 17" c5 wheels on the back of mine every weekend without any problems. i pops up on the display but all you have to do is hit the rest button.

 

For the drag strip - probably not as big a problem as on a road course.

However, if you run less than 24 psi in the rear the TPMS will think you're losing pressure and may create problems for you.

I haven't heard of the 42 psi (the area where the TPMS thinks your pressure is too high) in the front tires trick before.

My recommendation would be to get some different wheels for the front with no sensors, so that when you swap to your DR's and track front wheels, you have no sensors at all.

In a 2007 you should have about 1/2 hour of driving time with no sensors at all before the TPMS will act up.

If you have no sensors in your DR's and sensors up front in your street tires, the TPMS will no immediately when you start driving that it's receiving signals from the fronts and no signals from the rears - so it will cause problems immediately.

With no sensors at all in a 2005-2006 you'll have about 60 minutes before the TPMS thinks the problem is with the TPMS computer istself, because the chances of all 4 sensors being inop at the same time are very improbable, and nobody would run with no sensors at all - right?

For the 2007 they changed that to about 30 minutes.

So...if you drive your 2007 more than 1/2 hour to the drag strip you will get a DIC message of "Service Tire Monitor", but when you shut down and restart the engine you can clear any messages and have no problems again for another 30 minutes of engine running drive time.

Even on a road course track that 30 minutes should be plenty for most track day sessions.

The problem is that Chebie reduced that time period to about 30 minutes for the 2007-2008, and it's down to about 20 minutes for the 2009+. However, the TPMS in those model years doesn't seem to be as sensitive to running with no sensors as the early years do.

Good luck, and have fun at the track - and we want to see time-slips after next weekend's fun!!

Bob

 

what i did was buy two new sensors, and i made 2 little tanks from 4" PVC with 2 caps on it, drilled a hole through for the valve stem, put the nut on like you would put on to a rim, one set up for each side of wheel, put 30lbs of air in the tanks and put a tank in each storage compartment, reprogrammed....DONE! no codes no short cuts, i have pics if it may help you

 

Although I've heard of several owners that have done that, I'm not sure how it works.

When the car is parked for more than 15 minutes the sensors go into a sleep mode and only transmit their data once every 60 minutes.

When you drive faster than about 20 mph the sensors wake up and transmit once per minute.

So....if the sensors are in a PVC container and aren't rotating faster than 20 mph, it seems to me that the sensors won't be transmitting often enough to keep the TPMS happy.

Bob

 

IIRC it's the car that pings the sensor requesting info, not the sensor initializing the communication. That's why the procedure exists to identify which location each sensor ID is expected to report.

It's possible to program the car to 4 sensors and put all 4 in a pressurized container laying anywhere in the car and everything works normal.

It's not the sensors that go into sleep mode, it's the car's computer that is no longer requesting a response.

 

Actually, it is the sensor that starts transmitting more often at higher speeds; this is a measure to conserve battery life as far as I know. I have heard of that PVC pipe solution proposed for other cars, but it failed; good luck.

 

works fine with mmine, 140 plus mph passes

 

That is correct!!!

The tire pressure sensors are not transponders - they transmit ALL THE TIME!!

They transmit once every minute when the wheel is spinning faster than 20 mph, and every 60 minutes when the car has been sitting still for more than 15 minutes.

Each tire pressure sensor has a unique ID#. When you program the sensor ID#'s into the TPMS computer in the car, the first one you program is logged into the TPMS memory as the Left Front, the second one as the RF, the third as the RR, and the last one as the LR.

That's why we do the programming procedure in that order. If you do them in a different order they'll still program in, but if you do the Right Rear first, then when you read the DIC pressure for the LF it will really be reporting the pressure for the RR.

Similar deal if you get new tires mounted and they mix up the sensors - you'll still get reports of pressure in the DIC, but the location won't correspond correctly.

The TPMS computer memory in the C6 can only hold 4 sensor ID#'s (some cars with a spare that has a sensor can hold 5).

Bob

 

OK, so maybe I don't remember that well anymore.

I do know I had a period of about 5 months that I was running a set of wheels without sensors and the original set (with sensors) was in the garage. On my way to work, the DIC went XX on all 4 at the 25 minute mark and as soon as I arrived back home the DIC showed the pressure of all 4 in the garage. How is that possible if the stored tires/sensors only transmit once every 60 minutes?

 

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Specs for your canister please! Can't tell what size PVC you have there.

 

Um....there's no problem just taking the car to the track with drag radials on it.

You won't have any problems without the TPMS in the rear. I've driven my car for weeks with drag radials on the back without issue. Just hit "reset" to get the annoying display away. No need to go through all of the trouble discussed in this thread.

 

i do the same every weekend. it don't hurt anything.

 

If you haven't had the problem, good on ya!!

However, take a look at this thread in the AutoX/Roadrace section. Take a look at the posts by David Farmer - he's got a 2006 Z06 and has been driving it on the track for 5 years with no problems. Then it hit him and really messed up a track event. There are others that post in that thread that's it's severely messed up up track days for them as well:

http://forums.corvetteforum.com/auto...-handling.html

When it happens it's a real PITA!!!!

Bob