Slater Posted August 9, 2005 Author Report Share Posted August 9, 2005 so what I'm gathering is, if we can route cooler metered air(from the intake hose after the maf) to the egr while maintaining 200 degress at the sensor, we're gonna be flyin? is there a way to jumper out the sensor so it will always read 200?(as per your description of it reaching operating temp rather quickly) I dunno much about it, but i sounds like it could work. I'm willing to try it.←Well, I am assuming the EGR temp sensor is a basic thermosistor. And you could find the max resistance in VADIS and just wire in a resistor for that valu. This way, the ECU would always see the temp sensor as being the max temp, always opening up the valve.But there's 2 problems with 2 different purposes here folks. The one problem is how to trick the stock ECU into thinking the EGR system is still working. That can be done a few different ways more than likely. Either a resistor or a blockoff plate.The OTHER problem is what do DO with the EGR system once it's disabled. Instead of trying to pump cool air through the EGR system, who gives a crap about the system at all? The intake manifold itself has plenty of air coming in from the normal intake system. If you are able to disable the EGR system to the point where the ECU think it's there, then just rip out all the plumbing and make it like every other non-EGR car on the road. No pipes going to the intake manifold at all. Then all this talk about what to push through the pipe is meaningless. Link to comment Share on other sites More sharing options...
PullMyFinger Posted August 9, 2005 Report Share Posted August 9, 2005 I'm anxious to hear about your results on defeating the EGR system!How can we tell if we even have it? Specific years? or did some have it and others not kinda like the OBDI and OBDII transitional years.I actually bought a second ecu and had *that* one chipped. I wish I had known to get one out of a later year. Come to think of it, I don't know what year it was. I just went by the numbers. Which prolly means its the same year as mine. Ends in 072ps. my BSR stage III averages 18mpg pretty much no matter what I do. Link to comment Share on other sites More sharing options...
Slater Posted August 9, 2005 Author Report Share Posted August 9, 2005 I'm anxious to hear about your results on defeating the EGR system!How can we tell if we even have it? Specific years? or did some have it and others not kinda like the OBDI and OBDII transitional years.I actually bought a second ecu and had *that* one chipped. I wish I had known to get one out of a later year. Come to think of it, I don't know what year it was. I just went by the numbers. Which prolly means its the same year as mine. Ends in 072ps. my BSR stage III averages 18mpg pretty much no matter what I do.←Wow, I am a leadfoot and I get 21 in the city and 22mpg on the highway. On the stock ECU I would get 24mpg in the city and 27mpg on the highway.As far as the ECU, I know 95 had it. I am not sure about 93 or 94. Also, Rich said a while ago there were a few later years that had them (maybe a 70 series model or even a P2 car). I am not 100% sure. Link to comment Share on other sites More sharing options...
zimmy77 Posted August 10, 2005 Report Share Posted August 10, 2005 Well, I am assuming the EGR temp sensor is a basic thermosistor. And you could find the max resistance in VADIS and just wire in a resistor for that valu. This way, the ECU would always see the temp sensor as being the max temp, always opening up the valve.But there's 2 problems with 2 different purposes here folks. The one problem is how to trick the stock ECU into thinking the EGR system is still working. That can be done a few different ways more than likely. Either a resistor or a blockoff plate.The OTHER problem is what do DO with the EGR system once it's disabled. Instead of trying to pump cool air through the EGR system, who gives a crap about the system at all? The intake manifold itself has plenty of air coming in from the normal intake system. If you are able to disable the EGR system to the point where the ECU think it's there, then just rip out all the plumbing and make it like every other non-EGR car on the road. No pipes going to the intake manifold at all. Then all this talk about what to push through the pipe is meaningless.←but by leaving the egr installed and then introducing cooler air through it should help keep the intake cooler than with it removed. however, i'm not sure by how much and if it will be effective enough to be worth it.could you check VADIS and let me know what the max resistance is for that temp sensor?I'm thinking of making this a weekend tinkering project.you mentioned that there is a pressure sensor as well? does the egr require a specific amount of incoming pressure? or is this sensor for determining WOT so it can close the diaphram? Link to comment Share on other sites More sharing options...
TorqueSteer Posted August 10, 2005 Report Share Posted August 10, 2005 I have a 95 850 with a 96 850 Speedtuning ecu, so this means my egr is deactivated? Link to comment Share on other sites More sharing options...
Slater Posted August 10, 2005 Author Report Share Posted August 10, 2005 I have a 95 850 with a 96 850 Speedtuning ecu, so this means my egr is deactivated?←If Speed tuning gave you a 96 chip, yes. But you can run a 95 spec chip on a 96-98 ECU.So you woul dneed to find out from them what you got. If you told them you have a 95 they probably gave you the "right" 95 program.I had to lie and tell BSR I had a 96, so they wouldn't give me the EGR.In fact, if you guys REALLY want a nice chip, tell whomever is doing the chip do give you a EURO spec program. Euro spec has NO EGR OR 2nd O2 sensor. So no need to run an 02 simulator.EGR and rear 02 - just another stupid US EPA political thing that the rest of the world doesn't have. Link to comment Share on other sites More sharing options...
Slater Posted August 10, 2005 Author Report Share Posted August 10, 2005 but by leaving the egr installed and then introducing cooler air through it should help keep the intake cooler than with it removed. however, i'm not sure by how much and if it will be effective enough to be worth it.could you check VADIS and let me know what the max resistance is for that temp sensor?I'm thinking of making this a weekend tinkering project.you mentioned that there is a pressure sensor as well? does the egr require a specific amount of incoming pressure? or is this sensor for determining WOT so it can close the diaphram?←I'll check and let you know. Link to comment Share on other sites More sharing options...
TorqueSteer Posted August 10, 2005 Report Share Posted August 10, 2005 If Speed tuning gave you a 96 chip, yes. But you can run a 95 spec chip on a 96-98 ECU.So you woul dneed to find out from them what you got. If you told them you have a 95 they probably gave you the "right" 95 program.I had to lie and tell BSR I had a 96, so they wouldn't give me the EGR.In fact, if you guys REALLY want a nice chip, tell whomever is doing the chip do give you a EURO spec program. Euro spec has NO EGR OR 2nd O2 sensor. So no need to run an 02 simulator.EGR and rear 02 - just another stupid US EPA political thing that the rest of the world doesn't have.←The chip was made for Joseph's (JHEIII850Turbo) car. His car is a 96. i just bought the ecu off of him and gave him my stock 95 and I took his 96 speedtuning. Link to comment Share on other sites More sharing options...
EricF Posted August 10, 2005 Report Share Posted August 10, 2005 On my black wagon, I dis-connected the EGR by putting a bunch of weld in the fitting on the exhaust manifold (looked pretty cool ), and on the intake I was tapping the EGR hole and broke off the tap... Couldn't get it out, so I just covered it with JB weld or high temp RTV or something.Yes, I am the ghetto king. It worked though, no leaks :) Link to comment Share on other sites More sharing options...
Slater Posted August 10, 2005 Author Report Share Posted August 10, 2005 The chip was made for Joseph's (JHEIII850Turbo) car. His car is a 96. i just bought the ecu off of him and gave him my stock 95 and I took his 96 speedtuning.←Then your EGR is disabled because the ECU doesn't even know what an EGR is.You're still heating up your intake manifold and contributing to heat soak in your engine bay though...that's what the EGR bypass I am working on cooking up will take care of.So you have half of the problem taken care of. Just need to finish the job. Link to comment Share on other sites More sharing options...
Ping138 Posted August 10, 2005 Report Share Posted August 10, 2005 That actually makes more sence then trying to siphon more "cool air" in through the EGR, there is no reason to go to all that hassle, besides you cant add more air then the turbo can suck and I defy you to find a cool air supply to route into the EGR anyway, engine bay temps are too high on our cars to have a shot at that, why not just put a resistor in place to keep the valve shut at all times? or rock the JB weld idea......or not.Eric did you notice a difference???Slater if anyone has the focus to develop a siphon system for cool air its you so let us all know! Link to comment Share on other sites More sharing options...
Slater Posted August 10, 2005 Author Report Share Posted August 10, 2005 That actually makes more sence then trying to siphon more "cool air" in through the EGR, there is no reason to go to all that hassle, besides you cant add more air then the turbo can suck and I defy you to find a cool air supply to route into the EGR anyway, engine bay temps are too high on our cars to have a shot at that, why not just put a resistor in place to keep the valve shut at all times? or rock the JB weld idea......or not.Eric did you notice a difference???Slater if anyone has the focus to develop a siphon system for cool air its you so let us all know!←Nah, IMO the whole cool air system is a waste. The ER pipe is like 3/4" ID. What good will piping cool air through that do? Not enough to make the trouble worth it.I'm just going to concentrate on bypassing the EGR system altogether and working on other ways to cool down the underhood and intake temps. Link to comment Share on other sites More sharing options...
Ping138 Posted August 10, 2005 Report Share Posted August 10, 2005 Yea thats more or less what i thought too, no real value to that little bit of cool air Link to comment Share on other sites More sharing options...
TorqueSteer Posted August 10, 2005 Report Share Posted August 10, 2005 I'm just going to concentrate on bypassing the EGR system altogether and working on other ways to cool down the underhood and intake temps.←My solution to that was to cut the hole in the hood and add a 35 wet shot, I just got all the parts together, including the digital window switch , ill give an update on that as soon as I get it running. Link to comment Share on other sites More sharing options...
zimmy77 Posted August 10, 2005 Report Share Posted August 10, 2005 Nah, IMO the whole cool air system is a waste. The ER pipe is like 3/4" ID. What good will piping cool air through that do? Not enough to make the trouble worth it.←this is what I wanted to know. on with the disconnection! :) Link to comment Share on other sites More sharing options...
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