who really knows
Thread Starter
Race Director
Joined: Mar 2005
Posts: 11,549
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From: Southampton NJ
who really knows
who knows what happens when you air your drag tires slicks down under 23 lbs and warning light on i tried reset button nothing will it put you in limp mode
Race Director
Joined: Aug 2000
Posts: 10,649
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From: Central Florida
Why put TPS in drag radials?
I have none in mine and have driven 200 miles and 10 passes straight, with no issue. At about 30 miles, a DIC message appears stating Service Tire Monitor System. I just clear it. No issue.
Ranger
I have none in mine and have driven 200 miles and 10 passes straight, with no issue. At about 30 miles, a DIC message appears stating Service Tire Monitor System. I just clear it. No issue.
Ranger
Thread Starter
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Originally Posted by Ranger
Why put TPS in drag radials?
I have none in mine and have driven 200 miles and 10 passes straight, with no issue. At about 30 miles, a DIC message appears stating Service Tire Monitor System. I just clear it. No issue.
Ranger
I have none in mine and have driven 200 miles and 10 passes straight, with no issue. At about 30 miles, a DIC message appears stating Service Tire Monitor System. I just clear it. No issue.
Ranger
but i was going to leave them on bfgs with sensors and was wondering what happens when i air them to 16 lbs. will it slow me or is their a way around it . i heard the canister but the tire spinning activates out of sleep mode. and was told sleep mode works to a point but after so many cycles you start having problems any other advise
Team Owner
Joined: Feb 2001
Posts: 27,254
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From: Short Hills, NJ
Originally Posted by dennis50nj
when i air them to 16 lbs.
Le Mans Master
Joined: Sep 2004
Posts: 7,027
Likes: 6
From: Shiloh Ohio
If you have less than ten pounds of pressure it is considered a flat tire. You will get a flat tire message, then a 55 max speed message, a reduced handling message and active handling will become more sensitive.
If you have less than 24 but more than ten you will get a low tire pressure DIC message. I think all that happens for a low pressure condition is the message.
As far as no sensors, I do not know. Ranger has done it as he states above with no problems. Maybe the computer does not view this as a flat.
Dennis check this info in the manual. I am going from memory here so I may be a little off on the details.
If you have less than 24 but more than ten you will get a low tire pressure DIC message. I think all that happens for a low pressure condition is the message.
As far as no sensors, I do not know. Ranger has done it as he states above with no problems. Maybe the computer does not view this as a flat.
Dennis check this info in the manual. I am going from memory here so I may be a little off on the details.
Last edited by shurite44; Oct 6, 2006 at 02:37 AM.
Safety Car
Joined: Jun 2005
Posts: 4,905
Likes: 569
From: Bucks County PA
I am so worried about the Computer cutting power, I don't let my fronts ever read higher than 36# on the DIC (I have received an overinflation warning at around 40#) or my rears drop below 26# (I have received a low pressure warning around 24-25#).
Am I being paranoid?
Probably, but if I can get down the track with hot tire pressures of 27-28# rears and 35-36# fronts I won't complain.
I am sure I would run a bit better with 25-26# rear hot and 37-38# front hot, but my luck, after a lengthy cooldown in the lanes, I would get a warning at the line and it would pull timing or at least throw me off by thinking about it.
Howard
Am I being paranoid?
Probably, but if I can get down the track with hot tire pressures of 27-28# rears and 35-36# fronts I won't complain.
I am sure I would run a bit better with 25-26# rear hot and 37-38# front hot, but my luck, after a lengthy cooldown in the lanes, I would get a warning at the line and it would pull timing or at least throw me off by thinking about it.
Howard
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Safety Car
Joined: Dec 2004
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From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
Originally Posted by dennis50nj
who knows what happens when you air your drag tires slicks down under 23 lbs and warning light on i tried reset button nothing will it put you in limp mode
i can't answer your question directly, but i can say this.
i just finished installing my headers. it took a bit longer than i wanted, but all-in-all, it wasn't bad, and i got to do all the work myself, save for a little welding. well, anyhow, i had disconnected the battery when i started and reconnected it when i finished. i normally drive in 'comp' mode but for some reason all it would allow was 'traction control on','traction control off'. no, 'comp mode' and no 'all off'. i stopped and started her but still, no 'comp. mode'. finally, it dawned on me. check the pressure reported by my DIC (hehehe, that is just too funny, infintile, but funny). Hey, look, my tires are flat. 0lbs, in each tire. dag-nab it. oh, well. i waited it out, let the system get a reading for each tire and wha-lah, 'comp' mode, 'all-off' mode, everything back to normal.
granted i have an '05 mn6 f55, but that's how it worked with mine.
Last edited by Zig; Oct 6, 2006 at 09:02 AM.
Race Director
Joined: Jan 2005
Posts: 10,924
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From: Daytona Beach FL
Originally Posted by dennis50nj
who knows what happens when you air your drag tires slicks down under 23 lbs and warning light on i tried reset button nothing will it put you in limp mode
with everything most people have been saying - if you get a DIC alert message just clear it.Like Ranger said, even if you don't have sensors, when you start driving the TPMS is looking for a report from the sensors and it takes the car "about 60 minutes" (according to the manual) of steady driving before it decides the sensors aren't going to check in and the DIC will then give an alert "Service Tire Monitor" and maybe followed by "Limit Speed to 55".
That message is the so-called "limp mode" but my experience has been that it is just a message and there is nothing that electronically or mechanically limits your speed - you can go as fast as before.
You may not be able to turn off Active Handling or go into Comp mode, but you will still be able to turn of Traction Control. Like Ranger says, you should be runnin' the strip with AH on anyway. If you're road racing you probably want to be able to turn it off, but you're still not gonna have a problem unless you're doing sessions more than "about 60 minutes" long.
If you drop your pressures down and the DIC sends a message, you should be able to clear it and have no problems at the drag strip.
Bob
RLTW
Team Owner
Joined: Feb 2001
Posts: 27,254
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From: Short Hills, NJ
Originally Posted by yell03
I am so worried about the Computer cutting power, I don't let my fronts ever read higher than 36# on the DIC (I have received an overinflation warning at around 40#) or my rears drop below 26# (I have received a low pressure warning around 24-25#).
Am I being paranoid?
Am I being paranoid?
) but your fears may not be entirely valid either. I would like to experiment with this front to back pressure variation/gap and see if it can just be cleared or if it will in fact reduce power because I'm a firm believer in pumping up the front tires (and lowering the backs a little of course) for reduced rolling resistance at the track. 
Thread Starter
Race Director
Joined: Mar 2005
Posts: 11,549
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From: Southampton NJ
i always run with tire presure rear at 24lbs hot so each day when i pull car out of garage they are low you can not reset low tire in dash and right and left tire lbs presures in dic can not be reset it keeps flashing in the dic and on in the dash gauge and goes out when presure reaches 24lbs. with in a mile or so. but what is long term problems
Pro
Joined: Jun 2005
Posts: 593
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Originally Posted by Ranger
Why put TPS in drag radials?
I have none in mine and have driven 200 miles and 10 passes straight, with no issue. At about 30 miles, a DIC message appears stating Service Tire Monitor System. I just clear it. No issue.
Ranger
I have none in mine and have driven 200 miles and 10 passes straight, with no issue. At about 30 miles, a DIC message appears stating Service Tire Monitor System. I just clear it. No issue.
Ranger
EPA forces all their tests reset back to fail state any time errors are deleted or erased.