Computer Controlled Engine Governor In The 08 Avenger?
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Computer Controlled Engine Governor In The 08 Avenger? - 1/28/2008 2:14:09 PM
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futil
Posts: 330
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Has anyone noticed that at around 113 MPH the engine suddenly cuts the RPMs down to 4k preventing further speed?
I have been running speed tests the past few days on a stretch of road that is straight and barely traveled and I have noticed that I really can't go any faster than 115 (Although I ran out of road before I could complete testing for very long after the RPM drop off)
I know damn well the engine has more power than what its displaying at high speeds and its throttling down so that pretty much leads me to believe that there is a governor built into the computer.. Does anyone know anything about this?
I don't really like the concept of my car preventing me from getting a decent speeding ticket...
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/28/2008 5:14:43 PM
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JBattley
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From what I have read - these are usually set based on what the factory wheels can handle/are rated for.
If you have changed these - you should be able to talk to your dealer about eliminating the governor.
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/29/2008 10:10:19 AM
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futil
Posts: 330
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You're kidding me right? That has to be the lamest reason for governing the throttle on an engine that I have ever heard.
If that's true that's unbelievable.. If that's the case, then do you think I should be wary of my wheels shattering at high speeds? Well actually I guess not since there really is no high speeds to be had.. lol
I remember reading something in the manual about a high speed regulator or something like that.. They were boasting it as a desirable feature. I'm going to have to break out the manual and read it again..
I'm also curious now where the regulator is and if a chip would remove that limitation or if its just embedded in the car's computer (More likely)
Now what am I supposed to do when I get into a high speed chase? (I have slight road rage tendencies..) :)
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/29/2008 10:23:09 AM
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markio
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It is not based on the rating of the wheels, but of the tires. You would need to get tires that are rated for higher speeds, cause I am sure the wheels would hold up just fine.
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I got a sweater for Christmas. I wanted a screamer or a moaner.
2008 Inferno Red Dodge Avenger R/T
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/29/2008 10:26:19 AM
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DevilsReject
Toys For Tots Fund Contributor
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This is not an uncommon occurrence. Most of the vehicles on the road, especially Chrysler, have had these on them for the last few years at least. I know my 96 Z26 Beretta would cut out at 109mph...my 02 Dakota around 117mph...and even my Stratus R/T cut out at about 140ish...
Most cars are governed for a variety of reasons...
1.) Tires on the car are not suitable for high speeds. By preventing the car from going faster then the tires can handle, it keeps the car drivable and safe. That is of course if you consider 100+mph safe...
2.) Some cars are simply not designed to go that fast. Be it by design, lack of handling, not designed for the intended purpose, mechanical stress and failure, etc. A minivan has no real business doing 130mph.....while it would be more understandable for a coupe to be able to do 130mph.
3.) There are lots of groups and local governments looking to crack down on street racing, police chases, and general stupidity in cars all together.
Those are just a few I can think of off the top of my head...and most are probably 85% true...
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/29/2008 10:34:15 AM
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DevilsReject
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quote:
ORIGINAL: markio
It is not based on the rating of the wheels, but of the tires. You would need to get tires that are rated for higher speeds, cause I am sure the wheels would hold up just fine.
That is correct......a steel rim will handle upwards of 300mph. The problem is the way the tires are built. They begin to lose integrity once they surpass the speed at which they can handle. In other words, the tires can fall apart if they are pushed beyond what they're designed for...
Most standard cars come with S rated tires....some come with H rated tires.... I typically swap out to nothing short of a W-Y rated tire...
This is the tire speed rating list from TireRack.com, which is a sponsor here on the site...
quote:
Beginning in 1991, the speed symbol denoting a fixed maximum speed capability of new tires must be shown only in the speed rating portion of the tire's service description, such as 225/50R16 89S. The most common tire speed rating symbols, maximum speeds and typical applications are shown below:
M
81 mph
130 km/h
N
87 mph
140km/h
Temporary Spare Tires
P
93 mph
150 km/h
Q
99 mph
160 km/h
Studless & Studdable Winter Tires
R
106 mph
170 km/h
H.D. Light Truck Tires
S
112 mph
180 km/h
Family Sedans & Vans
T
118 mph
190 km/h
Family Sedans & Vans
U
124 mph
200 km/h
H
130 mph
210 km/h
Sport Sedans & Coupes
V
149 mph
240 km/h
Sport Sedans, Coupes & Sports Cars
When Z-speed rated tires were first introduced, they were thought to reflect the highest tire speed rating that would ever be required, in excess of 240 km/h or 149 mph. While Z-speed rated tires are capable of speeds in excess of 149 mph, how far above 149 mph was not identified. That ultimately caused the automotive industry to add W- and Y-speed ratings to identify the tires that meet the needs of new vehicles that have extremely high top-speed capabilities.
W
168 mph
270 km/h
Exotic Sports Cars
Y
186 mph
300 km/h
Exotic Sports Cars
While a Z-speed rating still often appears in the tire size designation of these tires, such as 225/50ZR16 91W, the Z in the size signifies a maximum speed capability in excess of 149 mph, 240 km/h; the W in the service description indicates the tire's 168 mph, 270 km/h maximum speed.
225/50ZR16
in excess of 149 mph, 240 km/h
205/45ZR17 88W
168 mph, 270 km/h
285/35ZR19 99Y
186 mph, 300 km/h
Most recently, when the Y-speed rating indicated in a service description is enclosed in parentheses, such as 285/35ZR19 (99Y), the top speed of the tire has been tested in excess of 186 mph, 300 km/h indicated by the service description as shown below:
285/35ZR19 99Y
186 mph, 300 km/h
285/35ZR19 (99Y)
in excess of 186 mph, 300 km/h
As vehicles have increased their top speeds into Autobahn-only ranges, the tire speed ratings have evolved to better identify the tires capability, allowing drivers to match the speed of their tires with the top speed of their vehicle.
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Are you in the Midwest??? Well we are doing a Charity Car show in Indiana on July 12th. Click me for details!!!!
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/29/2008 1:09:13 PM
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futil
Posts: 330
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Thanks guys for all your info.. I can see the tire rating being a danger.. but im friggen depressed now.. Might as well tell everyone to stop modding their exhaust, intake, and engines if all the car can do is 113MPH unless they are just looking for more torque or sound..
By the way I was joking about the rim shattering part.. but I didnt think of the tires at the time I said that..
Im sure the chances of the dealer disabling the governor is slim..
Just another thing to add to the list of things that piss me off about this car.. Has me wondering now how many higher end cars that are being marketed for their sporty looks and speed are governed as well.. Like if I buy a Dodge Viper should I expect that to only do 120?
Im not looking to go warp speeds.. but I would like to have a top end speed of around 130.. Just something about the tach dropping down to 4k that pisses me off lol
< Message edited by futil -- 1/29/2008 1:16:51 PM >
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/29/2008 5:03:23 PM
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JBattley
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Bah! I just read my own response and feel like a tard. Wheels = Tires is what I intended.
Yay for working and being slow to think. But glad everyone else set it straight.
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/29/2008 8:08:13 PM
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futil
Posts: 330
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Ok, well now that this is established.. Can I make fun of everyone that is putting in cold air intakes, muffler conversions, high flow air filters, and whatever else? :)
Im gonna start with myself.. I put in a K&N filter for nothing.. and was planning all sorts of engine mods.. what a ****ing loser I am lol (Don't mind me im just being a wise ass) Well I guess I can reach my 113 MPH faster then watch another car pass me...
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/30/2008 6:59:47 AM
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pbearfin
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The mods if you have the money are great for getting there faster. as for the governor it is built into the pcm programming by closing the throttle and injector pulse width. Also this thing is not a very stable vehicle at those speeds any way VERY VERY wishy washy lane changes feel like you are driving on marshmallows
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/30/2008 8:28:02 AM
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futil
Posts: 330
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I don't experience that riding on marshmallows feeling in my car at those speeds.. The car feels almost like its on rails and is very responsive.. (But I totally know what you're talking about as I have driven cars that feel like that) A tire change was all I needed in my last car to get rid of that feeling.. but it also relates to the suspension..
I bought the Avenger R/T FWD.. I was curious if by any chance you bought the AWD as that would explain the suspension differences.
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 1/30/2008 2:11:31 PM
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kkzzr6
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Does anyone know if the Jet chips defeat the governor? Jet has not answered my email.
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RE: Computer Controlled Engine Governor In The 08 Avenger? - 2/2/2008 9:01:09 AM
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futil
Posts: 330
Joined: 9/11/2007
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I just got back from the dealer for my 1st time scheduled maintenance and while I was there I asked them to disable the governor.. As I expected they wouldn't and they said there was some law or some crap like that why he couldn't do it... However he did mention that I should try a chip like the Jet chip.. I asked him if that would definitely defeat the governor and he said he didn't know.. Soo.. If no one replies to your question of if whether or not a chip will get rid of it then I will probably go out and buy one, then test it out, then let you know my results..
Im just not sure if i should get a Stage 1 or Stage 2 jet chip.. I have the stock exhaust, don't have the thermostat changed to a 180 degree one but do have a K&N Air filter.. Which all of those being changed is needed for the Stage 2 chip.. but I don't want to buy a stage 1 chip then want more power later and wind up buying another, so I will likely make the above changes and get the stage 2 chip.. or just get the chip and see what happens without those changes and change them later..
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