Idle Afr Target

>>Fuel regulator. Idle AFR help - 3. The last sheet is Corrected Fuel. 95 and down by 10%. Power is smooth to the limiter, pulls decent for 15psi on a stock head and skimpy cam. 10 to 11 AFR is an accelerator pump target point, plus, the king of torque @ WOT. Idle - At idle speed, the carb runs solely on the curb idle discharge port. the cars mix is usually 70/30 E85/pump for the cold start ups. It won't be perfect, but get is as close as possible. From the. Last week I had lost the sensor ground and made a drive where it thought the coolant was 0F. ac operation on an AEM in any S chassis is as simple as a switch input for ac request and a low side output to ac compressor magnetic clutch. AS a general rule of thumb if you have good fuel control (typical EFI) there is no reason to run near as rich as some of these so called tuners do. At WOT under hard acceleration, it should be around or below 13. 5 by 140kPa and closer to 12 by 200kPa. 6:1 and I am seeing the EGO corrections slowly ramping up and down between -5% and +5% giving actual AFR between 13. 5:1 for a smooth idle, while others will run happily at 13-13. 2 for 70-80% 13. TARGET AFR AT CRUISE Typically between 13. It won’t be perfect, but get is as close as possible. Select AFR Table – Click to change target AFR Table All AFR tables in you MSQ will be included,. If it is different, more or less air can pass leading to a very low idle or oscillating idle. 14 at WOT is simply because the sensor cannot read any lower (even though it might actually be lower). Don't forget that not only will carburetor tuning dictate AFR but so will spark advance including initial advance and the curves of the centrifugal and vacuum advances, as well as ambient temperature, humidity and engine. 5:1 at idle, I guess as the air warmed up. My target AFR are leaner toward the idle. The engine continues to idle at the 950rpm target but soooo much sweeter its like night and day, the AFR is massively more stable so much so at one point I thought my AEM X-Wifi had stuck at 13. For example if the base AFR table suggests 14. Let's assume we have an engine that is equipped with self-learning throttle body EFI but is also equipped a long-duration camshaft that idles at 9 inches of manifold vacuum. Target Idle RPM 1 0 0 14 4 0 0 2 0. Idle – At idle speed, the carb runs solely on the curb idle discharge port. Turn off closed loop if necessary. 7 in the Target AFR cells. The ECU will only "learn out" changes if you try and target an AFR its not targeting. Power is smooth to the limiter, pulls decent for 15psi on a stock head and skimpy cam. If you are too rich use lower number in the fuel idle cells. Once engine is started and closed loop is active, the AFR should read close to the Target AFR in the handheld readouts. 14-15 under light cruise. I was reading a thread on carb tuning that John Connolly of aircooled. 5 thru out the entire rpm range but with the new EFI ECU's with closed loop or open loop, the ECU constantly adjust the AFR's to meet the targeted AFR range. Adjusting the idle of the bike is the hardest part. Attached is the AFR map (read using TuneECU) from an OEM tune (20363) for a 1700 TBird with TORS. Guys running boost like richer mixtures so will run all the way to Lambda. The ideal AFR readings at idle should be between 13-14:1. Idle drops below target when warming up when the car was cooling down I had to lean the values again because AFR jumped below 10. FWIW, my AFR is rich at idle. Thanks, B-loose. 9 so I really don't have a clue. My turbo build-initial test drive and target AFR and VE ma quesitons What I have noticed however is if I give it a slight amount of throttle off idle it spikes. Of the values returned by this map and the main 3d fuel map(s), the richest value will be used by the ECU. Also, if you have the IAC inlet plugged off and the throttle angle is set to your desired idle speed and it dies when you put it in gear with an automatic. 1) If possible, change the hot start initial map to a target idle of about 1100-1500RPM. Do not be alarmed if you observe a lean idle on your WB02 as it likely erroneous. The AFR table is a 3×3 matrix – the AFR is interpolated between these breakpoint values. I set the idle rpm using the secondaries only. a bit off topic but I'm still trying to work out the link between adjusting the VE table and the AFR target table in VE Analyze live. The WOT AFR is probably around 7-9 depending on how much timing you're running. Is that AFR too high? I've seen usual AFR numbers around 12 idle and 15-16 WOT. Get the most out of your console. it's shape will change with engine modifications. 1 for 90-100% 13. Hello Hondata. » Ideal Target AFR @ Idle If this is your first visit, be sure to check out the FAQ by clicking the link above. if your car is running good and clean and your happy and nothing is knocking and afr is holding steady how about leaving it alone for now until you get the bigger turbo?razor also has a sticky in the alky section which is very good. AFR 16:1 is lean, the other way around is richer. The AFR table is a 3×3 matrix - the AFR is interpolated between these breakpoint values. target AFR, and the AFR that's actually measured in the exhaust. Other Megasquirt Updates. 26 units per PSI. This translates into an AFR of 13. There are a few reasons for this; 1. the afr range that the stock o 2 sensor can detect is 14. 5-14:1 and hung there. For example, if the idle drops an unacceptable amount when you turn the air conditioning on, you can use the closed loop control to compensate. In closed loop, commanded AFR is the value represented in the stoichiometric AFR B3601 cell and again, the PE table plus any adders that may become active. Then the software runs through the setting of the idle control circuit. For example if the base AFR table suggests 14. As I still want to cruise at 14. radiator fan, Power Steering, A/C etc. 1:1 all across the table, it will be burning gas like hell. The Maximizer 4 monitors the engines Air Fuel Ratio (from optional wide band O2 module), and automatically adjusts the fuel and nitrous solenoid output to achieve the desired Air Fuel Ratio (target AFR is user adjustable). 3 Wideband Lambda - Long Term Trim (Auto-tune). EFI Live HD Tuning is the ability to tune beyond what was capable before this was released. He doesnt need a custom tune to lean out the afr. When target boost is less than or equal to the first value, turbo dynamics correction is disabled and both integral and proportional correction are set to zero. You need to have a wideband O2 sensor and the ability to data log it's signal along with the TPS voltage and MAF voltage. Excessively rich idle AFR will foul plugs. I set my AFR target at 13. it gives you an idea of were the AFR line should be when dyno'd. The same process of checking actual lambda against the target value applies. It isn’t a theoretical target like AFR of 14. 7:1 – lambda 1. I do have a wideband hooked up, but the TS gauge is reading consistently. Great write up. target AFR, and the AFR that's actually measured in the exhaust. Welcome to our site. Dynojet considers the cruise range to be around 5-20% throttle. Heres a formula: Current afr - target afr = R R / target afr = S. Fueling is fueling though. The ratios presented in this table are a very good starting point. The owner commands a target idle AFR of 13. Advanced Tips for EFI Tuning with Fuel Pressure. Please feel free to weigh in here. Minimum Position: This value will be a value a few percent down from the percentage the car needs to idle when it is hot. 11 to 1 AFR is rich best torque at @ WOT. 2L and once warm your target idle AFR should be 14. 0 readings at idle, which is ridiculously rich. MS3 can run two independent VE, AFR & ignition maps (and boost too if needed). Notice how you have a very close base map already - Feel free to let me know how you go with this bit of help. 0 (stoic) will be ideal. 3 and driving in normal conditions under light load (cruising between 25mph-and40mph). target AFR, and the AFR that's actually measured in the exhaust. If stock, 14. On gasoline it will try to keep an AFR of 14. And on the contrary, since gasoline scale AFR seems to be the most universally used for E85 tuning (especially in the carbureted world), I think keeping the table in that scale is fine. target that you set. 5 @ 2180 rpm. Other Megasquirt Updates. Idle drops below target when warming up when the car was cooling down I had to lean the values again because AFR jumped below 10. Setting Target Idle RPM and Air/Fuel ratio I had the target IDLE RPM set to 750-800 initially. Check to see what your target AFR is at idle and see they differ. Driving didn't change the readings much. Normal running range idle to 4000 light load to medium load (20 - 60kPa) 14. Purpose built AFR and knock analyzers. Started by fxdl03. Target an air/fuel ratio of stoich (14. The reason that your AFR stays at 11. Idle Trim Jump Pos = Fuel trim works in a saw-tooth pattern – for example if the engine is rich, there is a slow decrease until lean, followed by a sudden jump rich. This setting stops the idle control from going to low which makes the motor want to stall after letting the throttle go. AFR learning is between +/-2%--Once the car is warm, the idle AFRs will bounce back and forth between 14 and 16. Note, this value will be slightly different for each application. without relocating my O2 sensor i think that is. Is the table that holds your "wish list", where you just put in what AFR you would like to see in each area of the engine operation range (idle, cruise, boost, deceleration etc') Guidelines: For idle I found that an AFR of 13. Greater air flow efficiency requires greater fuel flow to maintain the same target AFR. Stoichiometric Air Fuel Ratio: This is the Air to Fuel mixture considered chemically balanced within the vehicle's combustion chamber. I can see the CLL activates at the set 10%. Now start your engine and let it fully warm up, now check your AFR gauge, try to get the AFR that is right for your injection method and your engine. I reset all the values on my target AFR to 0 in the idle range and then manually adjusted my fuel map -15 in the idle range and with the rag over the exhaust im reading 14. My idle cells are bottom left cells since i don't run MAP. 5 respectively. So if you are having a really tough time tuning your idle and can't get it to run near stoich and it is rich, look at your injector dead time. The engine continues to idle at the 950rpm target but soooo much sweeter its like night and day, the AFR is massively more stable so much so at one point I thought my AEM X-Wifi had stuck at 13. 5 @ 2180 rpm. Also see if it likes more (or less) timing advance. Normal running range idle to 4000 light load to medium load (20 - 60kPa) 14. Heres a formula: Current afr - target afr = R R / target afr = S. This is due to a variety of reasons. If your AFR is rich, than the IAC will allow more air (= more steps) to achieve desired idle. 72 or so, which shows as a gasoline calibrated AFR of (0. The area between 500 and 800 rpm below 85 kPa and above 45 kPa is idle. it's shape will change with engine modifications. I just wanted to ask a quick little question concerning cold idle rpm with the v1 of the ez-efi system: Assuming i have set an idle speed of 800rpm during the setup process, what rpm should i see right after a cold start?. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon. Engines with larger cams may need a richer setting for smoothest idle. Then after the pump goes to 33% duty, reduce idle to normal. There is no intervention for MAP < 27 kPa, which is the point where the engine is deemed to be in vacuum and is decelerating (i. The second reason is the elimination of the mixed target AFR's at part-throttle. For example if the base AFR table suggests 14. Currently i have the fuel table set at approx values at 27 to 30 for idle and slow cruise Is this considered low?. Target is 13. The idle circuit is important, because it runs into the transition area - where a lot of driving is done, but the AFR there isn't too critical. 5 (lean) but under normal cruising and idle, you want to be around 14. This value adjusts how quickly fuel is increased (towards richer). This is done by lowering the idle speed in increments of 100 rpms (or less) and running the engine to allow learning of the map pages. Idle control valve characteristics vary between intake manifolds. the RPMs at which your engine will idle at when cold, and when fully warm). Hi there ! My first post question , I cam across AFR gauge we have in the car , so it seem to be a wide band , but my car on idle show 13. I'd venture a guess that that was the PO's doing, not McMark. Attached is the AFR map (read using TuneECU) from an OEM tune (20363) for a 1700 TBird with TORS. Idle Trim Rate Pos = At Idle, the fuel trim can be slowed to improve the stability of the AFR and engine speed. 5 at 20psi, 12. I convinced them to adjust the AFR and re-test rather than have me come back because it was a long drive from my house to the referee center. If you raise the pressure to richen it,the computer will lean it back out to get back to the target. This is one point that the EFI system will use to calculate the amount of fuel to deliver to the engine. 5% CO at idle. 170" of valve motion. 14-15 under light cruise. Make instant use of massive amounts of logged data to make appropriate tuning decisions. It is tuned to idle at 14. IDLE / LIGHT CRUISE: Target with GREEN mode - OPEN loop fueling When you start your vehicle we refer to this as being in IDLE condition. The flex sensor the determines what % of those maps to use (via another 2D table). 0 and your target is 13. Lambda and AFR are both indicators of an engines combustion mixture. So now the ecu will read from base fueling map. Great write up. The idle control function will assist the Idle Speed Screws (on the throttle valve) maintain a constant Idle Speed in and out of gear. adjusting the idle target AFR to leaner and richer 8. I just wanted to ask a quick little question concerning cold idle rpm with the v1 of the ez-efi system: Assuming i have set an idle speed of 800rpm during the setup process, what rpm should i see right after a cold start?. 3:1, which is a nar-row range of fuel mixtures, hence the name narrow band o 2 sensor. 0 range, 12. 1 parts of air to fuel 13. 0 = default operation. I set my AFR target at 13. I suspect you might just have the same issue I had where one bank is at 14. This screen shot shows a preconfigured tune for a 2011 Touring model that has a SE air cleaner and Rush True Dual exhaust installed. Alpina indicates the target idle % CO is 3. So if anyone knows what numbers I should be shooting for @ idle, cruse, and WOT I would greatly appriciate it. Troubleshoot vehicle tuning in minutes with the SAFR (Standalone Air Fuel Ratio) diagnostic tool. Initial Idle Min. There are a few reasons for this; 1. Dynojet creates target AFR tables for most of our pre-configured maps. The flex sensor the determines what % of those maps to use (via another 2D table). The AFR required to idle and run properly will also change just as rapidly as a result. The 1100, 3000, 6000 at 45kpa cruise are your cruising AFR ratios, these can vary from 13. If the engine you are working on is equipped with a power valve (no metering rods), the main jet size is what determines the A/F mixture that will be delivered to the engine at light-load/cruise speeds. 5 would be at WOT with low manifold vacuum. If stock, 14. TB48 ECU will shoot for 14. The WOT AFR targets are 11. Basic you give it what it wants, And it's yousally wery ritch, because of fueldropuot, incomplete combustion, stiff oil, and other tings. 7 to 1 with that I wouldn't try to go lean cruising unless the PCM is able to do it. Try to find a hilly area so various amounts of load is placed on the engine to hit more areas of your fuel map. You can keep your original and have this one as a spare. To set idle speed go to VCM Editor>Edit>Engine>Idle>Idle RPM>Target Idle RPM vs. 6 AFR is 13. By Default your normal. Cruising part load I would target 14. Afterwards I always go back and make my target idle something that starts high and gradually decreases. for example, i had an aac value of 28% so I opened up the idle valve a little bit and the aac. Try this, change your base AFR target value in PE to 8:1 afr and you will see your AFR PE with the same VE are not the same. The AFR table. changed "AFR" to "Lambda", and the stoich value from 14. The Maximizer 4 monitors the engines Air Fuel Ratio (from optional wide band O2 module), and automatically adjusts the fuel and nitrous solenoid output to achieve the desired Air Fuel Ratio (target AFR is user adjustable). Readings above 1500 rpm or so will be accurate. com and affiliated sites. 8:1 (stoich of E85), thereby producing a voltage that corresponds to stoich/lambda. I aim to hit a target of lambda = 1 always, or 14. Once there is enough exhaust flow, it will sometimes keep the fresh air away from the sensor and you'll get a more realistic reading. I reset all the values on my target AFR to 0 in the idle range and then manually adjusted my fuel map -15 in the idle range and with the rag over the exhaust im reading 14. radiator fan, Power Steering, A/C etc. An Idle Target of 758 shouldn't actually be possible. 7:1 - lambda 1. The other tables adjust closed loop across the whole of close loop which I don't want. But all your input is being used and some of it has helped. You would target 7:1ish flat out. Now, whilst this is a f-huge improvement on before, and it is running nicely, I have been tuning against an AFR table which I think is what you would call 'safe', there is no allowance for light throttle cruising, and am unsure how to go about this, especially for a RV8 which can be a bit finnicky. Can't eat fuel. The AFR table is a 3×3 matrix - the AFR is interpolated between these breakpoint values. - AFR Targets - Opens or select what AFR target Table to use. This is due to a variety of reasons. In closed loop, commanded AFR is the value represented in the stoichiometric AFR B3601 cell and again, the PE table plus any adders that may become active. I'm getting some lean misfires at idle and I need to richen it up a bit. Super lean with factory injectors, 14b, no tuning device at idle. Here is a generalized guide to give you a rough idea of where your target AFR or lambda value should be:-At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14. Boasting the ability to measure the full scale of AFR values, the SAFR supplies motorsport enthusiasts the information necessary to accurately understand their vehicle's operation. • Your run time and/or engine temperature configurations have been met. Our cars don't go any lower than 10. 7 on average depending on the engine. 5:1 at idle, but this brings back the hot idle situation. /// clears data that might cause problems when switching from idle to normal fuel do the math when the user requests the target AFR and feedback AFR maps:. I convinced them to adjust the AFR and re-test rather than have me come back because it was a long drive from my house to the referee center. net was on and he suggests a much leaner idle/cruise AFR than what I've been running. The AFR table is only a base fuel table, all of the other lookup tables mentioned earlier are multipliers of the this table. xyz global rank is. Boost Control Initial Duty Table. I do have a wideband hooked up, but the TS gauge is reading consistently. As much as I'd like to wait, I don't like the idea of not having timely support with the tune. I did not make any changes to the parameters, only on Target AFR and the correction on the Idle Speed Curve chart. Also you mentioned you were interested in a wideband. As you can see, the carb was overall very rich. In open loop, it's determined by the Commanded Fuel in Open Loop table, the PE table, and any other adders that may become active. Readings above 1500 rpm or so will be accurate. When driving, AFR is spot on target. But remember, when in doubt, if 2 different clip positions or different main jets result in a very similiar feel and engine response, always go with the richer setup, until you can verify your afr! Target range for the needle height should be an afr of 13-13. 9:1 but I'm still playing with spark timing to see if I can find a higher AFR sweet spot. The 1100, 3000, 6000 at 45kpa cruise are your cruising AFR ratios, these can vary from 13. Then measure the WOT AFR. There are two basic tuning tables provided: • Main Fuel Table – use this tuning table to adjust the ECM’s AFR target for both front and rear cylinders at the same time; a positive value will be richer, while a negative value will be leaner. 5:1-13:1 for street use. Adder Activation (Min. Also zero idle control so any leaner and it's not so stable. This means that if you are currently idling and there is not a valid Target AFR specified in the idle range of the Target AFR table, the light will stay off. 1 as RPM rises from 6,000 to 14,750 on 93. Anything above 13 under full load or 14. The area between 500 and 800 rpm below 85 kPa and above 45 kPa is idle. Pretty straight forward. Idle drops below target when warming up when the car was cooling down I had to lean the values again because AFR jumped below 10. Requirements. Once youve matched latency to idle near stoich and kconst to run near the target AFR you’ll be able to make pulls and the car will drive just as OE. The engine performance in terms of power and fuel consumption is highly dependent on the air-fuel ratio. On e85 my horsepower target is 400hp with my 20litre and about 420-450 out of my stroked. To take advantage of SLI, the system must use an SLI-certified motherboard. You may have to register before you can post: click the register link above to proceed. So far on the EFI cars I've tuned with E85 for idle, part thorttle and cruise on the street, I've let the computer maintain close to 1 lambda. Hello Hondata. I'm just wondering if this type of range is normal and if there is a good 'how to' for tuning the TEC parameters that control the EGO correction as it seems that no matter how I change. These are the calculated fuel values required to achieve the target AFR values. Some motors will need to be a little on the rich side at idle cruise (12:5) amd the less cammed up motors will be fine being leaner (14:1) at idle / cruise For WOT on pump at 8psi aim for mid 11's AFR & beat on it all day long. 5:1 CR, 268 cams. A quick and dirty correction for Gasoline AFR's to true E85 AFR's is to divide the gasoline AFR by 1. 0 (stoic) will be ideal. 4 consistently. 15 to 16 AFR is best economy part throttle. I didn't notice this was yours but it looks upside down. 7 being the industry standard stoich AFR value, we typically like to see these conditions run slightly richer. A Fuel Injected car also needs specific " tweaks " when running high overlap cams. Well ever since I have had my wide band o2 (AEM UEGO) I have been seeing very rich AFR's on idle. 7:1 – lambda 1. injector pulse width to produce a target air/fuel ratio (AFR). This will allow the vehicle to be emissions friendly and fuel-efficient. I keep hearing that the E303 cam does not idle very smooth. The other tables adjust closed loop across the whole of close loop which I don't want. Keep in mind that a high AFR (lean) is more dangerous to an engine (as has been said on this forum "Too fat is better than too lean!"), so best to err on the side of rich at least while getting to know the engine. 2ms and will be at around 14. 7 is lean but acceptable and should actually be getting you good fuel economy. This displays the current AFR as measured from the front wideband oxygen sensor. That ratio however provides inadequate fuel for developing the most power out of an engine, amd more importantly, it also provides inadequate cooling on a two stroke at anything but very light throttle positions. 3 for 50-60% and so on, It helps with mpg and actually runs better. Repeat #6 until the car is as close as possible to what you are commanding. I'd try and get within 13. I don't want to run in open loop so this feature would be great. Now, whilst this is a f-huge improvement on before, and it is running nicely, I have been tuning against an AFR table which I think is what you would call 'safe', there is no allowance for light throttle cruising, and am unsure how to go about this, especially for a RV8 which can be a bit finnicky. Make instant use of massive amounts of logged data to make appropriate tuning decisions. In addition, a slightly rich afr as opposed to a slightly lean afr seems to provide a smoother idle. Timing is a very useful tool for controlling your idle speed. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon. The owner commands a target idle AFR of 13. If the information from the O2 sensor says the A/F is richer than the target,it will lean it out to get to the target. 0 range, 12. Tuning the MAF. The high idle is just using excess fuel, and also makes it difficult to shift into 1st when fully stopped. Tune for performance and use the WBO2 in combination with rpm (along with MAP or TPS if possible) for tracking the effect of fueling changes. Don't get me wrong, running your AFR at 14. Number 1 is for Idle AFR which can range from 13. 3 for 50-60% and so on, It helps with mpg and actually runs better. Here is a generalized guide to give you a rough idea of where your target AFR or lambda value should be:-At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14. I adjust by feel, crank it rich until the idle hunts then lean until it stops hunting. If you want to richen up the idle simply replace your idle air bleed with a smaller one (less air in the system = more fuel = richer idle), this will help you get your mixtures screws within the 1-2 turn range. Get AFRs around idle as smooth as possible in open loop without any feedback or idle troubles will happen. IDLE / LIGHT CRUISE: Target with GREEN mode - OPEN loop fueling When you start your vehicle we refer to this as being in IDLE condition. car running rich and unsteady AFR at idle Engine Management & Tuning. It is designed to work in Internet Explorer 6. Rename the tune something with meaning, such as Final. 2 at idle now? The cam is so large that it swings from 13. The area between 500 and 800 rpm below 85 kPa and above 45 kPa is idle. 0:1 (remember, narrowband O 2 sensors are only accurate from 14. IDLE RPM: 900 TARGET IDLE AFR: 14. 7 to 1 with that I wouldn't try to go lean cruising unless the PCM is able to do it. I am setting up my Fitech 30002 on a SBF 408W with a moderate cam (setting #2) and have fouled 2 sets of plugs in the process. I found that doing it this way significantly increased the off-idle performance too. But all your input is being used and some of it has helped. Idle Stability; In many cases, the idle stability will determine where we set the idle air fuel ratio. You want the AFR to be a lot higher than that most of the time. Closed-Loop Idle Target RPMs. The high idle is just using excess fuel, and also makes it difficult to shift into 1st when fully stopped. 7 on average depending on the engine. 8:1 (stoich of E85), thereby producing a voltage that corresponds to stoich/lambda. This is done by lowering the idle speed in increments of 100 rpms (or less) and running the engine to allow learning of the map pages. This is one point that the EFI system will use to calculate the amount of fuel to deliver to the engine. It isn’t a theoretical target like AFR of 14. I set my idle AFR to 13. Cruise mixture I would find yourself a loop you can run,20 or so miles,low to no traffic,and play with the AFR's,I've tuned a carb to 16-17:1 AFR on flat roads low throttle opening,high vacuum with no surging.