Low Boost No Tune

This is an odd move from GM who usually is very tuner and enthusiast friendly. Complete documentation is supplied, and the support pages, videos, application notes and tuner resources can also speed you on your way to effective tuning. It seems like they do this to improve boost response and from my limited testing it seems to work. Plan to tune and to for 8-9 psi. You will have exhaust pop, you will have sluggish low/mid RPM performance. Tuning affects performance and power, sometimes in disproportionate amounts. 60" Supercharger Pulley. No warranty is expressed or implied on the Tuner option. Yes opening up your exhaust increases the flow through your exhaust system. BOOST Glucose Control® Drink is a balanced nutritional drink specially formulated for people with diabetes. Holding it down at the same time as the function button will lock the tune dial. Boost ramps up linearly from about 0. Now that meth spray, boost and true gas afr are all set, you can try to add a little more timing. Chips, exhaust, larger turbos, bigger/slotted/drilled rotors, high performance brake pads, manual boost controllers, performance shocks/struts/springs, airbox mods and more!. These Edelbrock E-Force Supercharger systems will boost the performance of your S550 Mustang to impressive levels without changing the daily driving characteristics. Boost cost me 1500 bucks on my RX-7. The low pressure side is located on the compressor. The combination of the low boost, intercooler and use of race fuel allowed us to safely run the timing test without fear of detonation. What we have done is add the RTT on top of our existing VCM Enhancements. They're only good to 22 psi.



The idea is to free up air-flow coming into the engine which allows your Mustang to breathe easier equating to more power. Though I agree the with the theoretical explanations posted here, in practice, having a too large number of trees is a waste of computational power and makes the model objects uncomfortably heavy for working with them (especially if you use to constantly save and load. In a recent 2014 survey, the end-fed half wave antenna (EFHW) is the world’s most popular antenna for those carrying everything they need for remote operations. Boost will be higher on stock motors. The RB20DET was originally found in the R31 GTS-X and the RB20DET-R in the GTS-R. After purchasing 10 of our personal Eco-boost vehicles Gearhead Sales has become invested to bring our Eco-boost customers the best tuning and products available. I’ve just boosted my 1993 Integra with a b18. A lean mixture or detonation can quickly destroy a forced induction engine, even at low boost levels. A capacitor was put over the feedpoint to shunt up the feedpoint impedance. Obviously isnt smart to beat the car like it is with zero tune but we were bored. Taking a car on the road for a few mins and have a prefect tune is not possible. -Assuming no intercooler, stock timing with an early (not LA or PE series) ECU, premium fuel. On a low boost engine the power mixture we use is a CO reading of 6. "Auto-tune: Tuning point not near vertex", which indicates that the operating point is inside the global window, but it is not near enough a vertex (as defined by the "radius" parameters), and so no action will be taken. Tune Hotel - 1Borneo Kota Kinabalu accepts these cards and reserves the right to temporarily hold an amount prior to arrival. Before you depart into your adventure in tuning, you should know how much you are willing to spend and in what general order you should purchase your parts. ), there can be no category for “slow airs” just as there can be no category for “speedy tunes” or “really great ones”. VX HSV 255 Timing Table Below is a VY Series II HSV 285 upper timing table. HP Tuners will be able to tune your larger injectors if you go that route. The 1g's have a pretty aggressive timing map, and with higher compression pistons, you have to back down the boost to stay away from.



Then I did a test by first accelerating the car to 5500 rpms at no boost. If you are having a stumble and no black smoke out the tailpipe then you will need to increase the shooter size. Low boost is handy for wet greasy days - otherwise run high boost all the time. The KTuner Flash system allows you to reprogram/reflash your stock ECU directly over your OBD2 diagnostic port. low timing and rich mixture. The COBB Tuning Accessport comes with Off The Shelf (OTS) maps designed to support any vehicle of a specific make and model throughout all climates and elevations. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. If you suspect the wastegate actuator is rusted out inside as well, a junkyard would be a good source for that. Injectors are almost always better than a FMU, but for such low boost it would save you money. 03 WRX low boost problem While I was at it I took off the manual boost controller the previous owner had as well. Easy, quick assembly with no tuning needed. Re-enter the required channel number. How to tune the number of decision trees in an XGBoost model. Input attenuation pad included for reducing input levels of 1 watt or so. The fact that there is no formula, and that WGDC percentages will change from. When I did this there is a T connector and I just hooked up the two lines that went to the boost controller to the T connector.



Either fully tuned (most popular) or Tuner. in first gear the boost goes to. At under $1,000, these products may seem attractive in price however when one considers that at most it is $25 of parts from the clearance bin of the local electronics shop, little or no R&D along with the very poor level of tuning expertise that has gone into the product, it is an item that no Toyota Land Cruiser owner would be associated with. Hell 440's won't cut it above 20psi. Ideally, you'll want the timing to be set to slightly below the timing that would give it the most power - on most piston engines, this typically works out to somewhere in the 10 to 18 degree range. Obviously there is no hard rule “If you do this you will get this”. Default Wastegate Position. Manual boost controller for boost adjustment, 4. Most important: first set a boost limiter which is the maximum you wish to run, making sure you do not set a limit that exceeds the limits of your map sensor. I would have gone with colder plugs if I could cross reference a colder plug. to put it mildly (in the past I’ve been borderline narcoleptic). The current edition of the Configuring and Tuning HP ProLiant Servers for Low-Latency Applications White Paper, 581608-006, includes the following additions and updates: "Recommended hardware configurations" on page 3 o Updated information to new E5-2600 v2 versions of processors o Updated recommended memory speed to 1866 MHz. wide band no tune low band mobile antenna with shock spring 32-33. We carry full lines from Cabrinha, Core, Ozone, F-One, Dakine, NP, Carved and many others. When I was on the Stage 1 tune, all I had was a CAI (Voltages adjusted for) and STI catback exhaust. 2 days ago · Thus, the majority of pharma firms are in a favorable position to raise debt capital from the market, which could be favored by low interest rates, to further boost merger transactions. Thats ok too on a built motor. 9L bolt-on system for the 2015 and up Ford F150 5. This will allow you to add the parts in stages if you choose to.



2015-2017 F150 5. Then down along country road boom CEL, Trac off, and brake override malfunction. The torque gain down low over the economy tune is almost 100 lb-ft of torque at the wheels. Subject: RE: Lyr Add: 'Street of a Thousand Assholes' Tune??? From: Once Famous Date: 15 Dec 04 - 10:27 AM I am not at all easily offended as many on this site know. 0L 5 Star Tuning Boss 302 Intake Manifold Kit with Tunes (Tuner Optional) quantity and can give your truck a huge boost in performance with up to. Why does the Supercharged Hellcat 6. I don't have them myself. Also, the car sounds like semi truck with the turbo noise. 196 Products. 11 but then it goes down, ill have to check. ***This log is from the low boost setting of 17psi** Again here is the same bone stock engine EVO 8 from above after a Brewed E-tune using No Lift Shift to keep the turbo spooled while shifting up through the gears. Horror Legend John Carpenter On Surviving Hollywood As a 'Low Rent. By building maps based on speed density as opposed to the MAF sensor, Knose’s tune for the STI allows the use of virtually any intake. Enter a few parameters for your engine and your horsepower goal and in a matter of seconds, the Garrett® Boost Adviser will provide you with the. These ten simple but effective retail marketing tips should help you give your sales a boost and be more efficient with your marketing.



On mine it is a little louder at idle and unnoticeable while driving. wide band no tune low band mobile antenna with shock spring 32-33. Some tuners say that LS motors run the best at 13. This is setup usually so that say 100KPA is a "zero point" - no change (the zero point can be anywhere you choose). VX HSV 255 Timing Table Below is a VY Series II HSV 285 upper timing table. I don't think the gains for a low boost turbo would be worth the money (tuned or not). The important thing to remember is that 0% wastegate duty cycle (0% WGDC) means the solenoid is not being actuated at all and this results in low boost (spring pressure). First day on the 87 base tune. Metco Motorsports 2. Well, increasing the amount of boost (technically, fooling the wastegate to open at a higher-than-stock boost pressure) is a cheap and easy way to add real, usable power to your 22R-TE's output. Would You Tune and Boost Your Brand New Diesel HD Truck? (Ask TFLtruck) Are you concerned about voiding warranty on a $70,000+ truck?. You can take two factory 525's slap the same exact mods on them with the same exact tune and produce very different dyno numbers between the 2 engines. This high-tech tuner helps your ride reach its full potential with custom-tuned power levels for mileage, towing, daily driving and performance. Additionally, someone suggested I contact a well respected mod company that works with these engines and they said they've personally seen this issue on a few of their test cars, and noted (like with the ATS owners) it happens whether stock or tuned (which points to a fundamental flaw/problem, not a tuning issue). 6 merlin@three. If its more you must loosen the waste gate. But I'm a little confused on what effects part throttle/cruise tuning. To change LMK parameters, the device needs to have root support. It is fairly easy to change the boost to get the best combination of performance and power, but it is extremely difficult to change the compression ratio, especially if you want to lower it.



), there can be no category for “slow airs” just as there can be no category for “speedy tunes” or “really great ones”. Find descriptive alternatives for tune. My low cpu scores have gone up since switching on turbo boost. Jun 24, 2019 high enough energy to fire the spark plug in high-performance engines with extreme boost pressure. A lean mixture or detonation can quickly destroy a forced induction engine, even at low boost levels. -Assuming no intercooler, stock timing with an early (not LA or PE series) ECU, premium fuel. Haven't received my intercooler yet and my ECU is on its way to PPEI for the tune, anyhow here are some pictures. The amplifier has two stages. What kind of idiot would rather do that then use a Trinity for $600 less and no downtime? Dinan is showing 96hp and 103ft/lb gains with their tune, upping the boost from 9. How fix the turbo boost pressure low - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. He agreed to help us develop an EcoBoost tune that would put the boost back in our EcoBoost, but on California's weak 91-octane fuel instead of race gas. When fuel is even slightly decreased all these things follow suit and also decrease causing low power. I droped it into the console. The fact that there is no formula, and that WGDC percentages will change from. Motor Timing: Dynamic Timing ("Boost") What little sense this article might have will be lost to you if you haven't read about how static timing ("blinky") works first! No Compromise. I would expect with those mods alone you'll see an approx.



(18) Ditch your ride's restrictive stock settings with an Edge Evolution CS2 Programmer. I am buying a turbo kit the question is how much boost can i run with no tune its not a daily driver i was thinking like 1 or 2 psi i am going to get it tuned but my tuner is booked right know and i cant wait to see what it looks like??. 4L-Rotrex Supercharger Kit for the 2. Some known boost by gear/speed controllers are:. 2014-2019 Symposer-Port Blow off Valve "kit" no tune needed. and you will notice a. When the tuner is active, pressing the tune button a second time enables you to tune to a arbitrary reference pitch. I recommend going from a low max_depth (3 for instance) and then increasing it incrementally by 1, and stopping when there's no performance gain of increasing it. My TP stage 2 map I'm using now runs around 11. FITS: 2006-2009 2. A much better way to tune a room is with absorption that reduces the response-skewing reflections that are the root of all these problems. If your engine is very knock limited you will have no choice that make boost. Lethal Performance 07-2012 GT500 Pulley Pack w/ JLT 123mm Plastic Big Air intake Package Includes: JLT 123mm Plastic Big Air Intake. 7 boost based on ATI 15% 8. On mine it is a little louder at idle and unnoticeable while driving. boost and 10 to 1 compression You have to have the tune spot on and be pre-paired to run low timing. Boost & Tune Solutions. 2016 Camaro SS /Corvette Performance Parts Non Intercooled and No Tune $ 4,996.



Send in your stock tune file to support@phastekperformance. DAILY MODE We have noticed that while in normal everyday mode that the transmission will move into 8th,9th, 10th gears really quickly around town with speeds as low as 42 mph this really lugs the engine and when trying to accelerate there is a pretty good delay to build boost and either downshift or accelerate. Gimme 5 Mammoth® Intake / 168mm used on all 2. But I'm a little confused on what effects part throttle/cruise tuning. When Ford Motor Company launched its EcoBoost program, it had two key outcomes in mind: 1) design a smaller, more efficient engine to replace larger, less efficient power plants yet produce the same (if not more) power, and 2) achieve superior fuel economy over the outgoing engines (especially when not under heavy loads). Low load area no risk of ping; you can change timing in the lowest rpm row to help with start up. I then disconnected the map and ran it that way with no change. but did not rule to be modified in other freq. so tuning your car will change that. Your supercharger flows a lot of air and it all has to go somewhere! Make sure you have a good 2 1/2 exhaust system. Time will tell if cold plays a role, we get as low as -38°C for a few weeks consistently where I live. Separate ALS-600PS power supply (included) can be placed conveniently out of the way and plugged into your nearest 120 VAC outlet -- no special wiring needed. Because the AGP Wastegate Actuator has a higher base spring rate, it allows the turbo to push higher, more stable boost. Raising the federal minimum wage to $15 per hour would raise pay for 27 million workers but also lead to over 1 million job losses, according to Congressional Budget Office (CBO) projections. By building maps based on speed density as opposed to the MAF sensor, Knose’s tune for the STI allows the use of virtually any intake. Simply plug the KTuner Flash system into your OBD2 port under your dash and reflash or tune your car using the KTuner software. 60" Supercharger Pulley. Remember it's completely computer controlled, and can completely retune itself for a different fuel type. Plan to tune and to for 8-9 psi. so ive got a rb20det.



Innovate also has a great network of local dealers, tuners, race shops, and dyno shops that can assist you in choosing, installing, and getting the most out of your Innovate products. It did not pull. The fact is that no matter the source of boost, it takes the same power to get the same boost. Intel Turbo Boost Technology Monitor, as a GUI utility, could be used to monitor Turbo Boost; this utility has reached the end-of-life state by no longer supporting Intel processors released after Q2 2013, and is no longer available. Fine-tuning your XGBoost can be done by exploring the space of parameters possibilities. 2015-2017 F150 5. Boost also increase EGT. 5 trucks only reads to 22-24 psi, 2006-2016 MAP sensors read to 37 psi. Finally, due to the triple-fin housing design, the HKS SSQV makes a very distinct, pleasing “whoosh” when excess pressure is vented. But if I turn off the car and start it up again, it makes strong boost initially, but after one or two mid to hard launches, it goes limp again. Cars (especially forced induction) can be tuned to utilize the lower probability of detonation inherent in high octane fuels to advance timing or increase boost in order to create much higher power outputs. You will have exhaust pop, you will have sluggish low/mid RPM performance. RDS objects). This month, 5,000 distinctive cans of Fuzzy Logic beer will appear on local shelves as part of Massachusetts-based Portico Brewing’s attempt to stand out in the aesthetically competitive world of craft beer. The new 2018 Harley-Davidson Softail Low Rider is one rad cruiser. 49 cp-e Ford Fiesta ST MAPtap. Also there is no reason to strain and push the motor with tons of boost, if the wheels are just spinning anyway. If you have no ability to tune yourself, my main service allows you to postal mail me your PCM for tuning, for just $85 OBDI LT1 / $90 OBDII LT1 / $100 LS1 for basic changes, or only $165 OBDI LT1 / $175 OBDII LT1 / $185 LS1 for power, MPG and/or auto transmssion tuning, or for your '92-'93 LT1, have me mail you a new. cause if you have a stock computer and some aftermarket upgrades you should be pushing more air in to your car and more fuel into your car. 6 Supercharger pulley.



So you decided to put a nice big lumpy cam in your LS3 or LS7 engine and now find you're having some trouble getting the idle tuning squared away. It is messy and has low timing advance at low rpm with a mountain chopped out of it at low rpm. The French government has announced an anti-pollution plan, including a financial boost to buy electric vehicles, as Paris and other cities in the country are emerging from a particularly severe. Links to third party sites are provided for convenience and unless explicitly stated, AMD is not responsible for the contents of such linked sites and no endorsement is implied. K&N Cold Air Intake ScanGauge2 Install Had to remove the entire front cluster because that little cubby hole seemed like the perfect spot and I didn't want any wires showing, and yes the door closes in front of the screen with no. do i really need a tune for a new cam? This is a discussion on do i really need a tune for a new cam? within the Internal Engine forums, part of the LSx Technical Help Section category; I want to find the best cam for a stock with basic bolt ons for an everyday driver and I. Plan to tune and to for 8-9 psi. Like all good things, however, boost is best in moderation: too much boost will cause your engine to detonate itself to death. If a VCM Enhancement has support for RTT, it will display as follows:. I mean, ya usually know around what a/f ratio you're shooting for on a given tune in different areas of the tune, so to get around where you want without knock is probably a good idea. This portion of the intake is under pressure when the engine is loaded. Purge air from the low pressure fuel supply circuit with the hand priming pump and by cranking the engine in 30 second cycles. Setting the. Boost levels shown below: This particular kit makes about. 0 second it hits. However, keep in mind that this is NOT always true. If the supercharger rotors do not rotate, there can be no boost. Please do not just crank the boost to the top of the range listed below and assume it will be OK as this almost always results in a blown headgasket or melted piston. On Mar 2, 2009, a question titled 'low power, no boost pressure' (3519) was added to the Detroit forum on Diesel Talk. 18000 max supercharger RPM.



It's nice to have the low gear range but in my opinnion, in most cases it isn't necessary. Boost & Tune Solutions. Subject: RE: Lyr Add: 'Street of a Thousand Assholes' Tune??? From: Once Famous Date: 15 Dec 04 - 10:27 AM I am not at all easily offended as many on this site know. Engine Performance Curve; Eco vs Hot tune (Hot tune has higher full-load output, higher allowable exhaust temps). No more devices, no more aftermarket boost controllers. I have the Hot Juice and the low boost fueling also seems to help spool the SPS66 turbo. low static compression ratios will handle considerably more than a single atmosphere of boost, but it takes some careful planning to control the spark and fuel demands. Driving at about 110 Kph it used to show about 4 lb PSIG, now nothing. So for example, if you MBT out at 35 degrees at 3k rpm, then for maximum efficieny y. Tune Required vs No-Tune Required Mustang Cold Air Intakes. Replacing the DV is a good maintenance and performance item, it will ensure that your car will hold boost without any issues once you add more power. What I'm sort of looking at is starting with a low boost set up that I can upgrade as needed to maybe hit 180hp if I feel so inclined in the future. By Unknown op. The factory map sensor which electronically measures boost on a 2001-2004. Boost cost me 1500 bucks on my RX-7. cause if you have a stock computer and some aftermarket upgrades you should be pushing more air in to your car and more fuel into your car. Aftermarket air intake, tire size, code removal, grid heater, LML cp3 conversion, aftermarket lift pump, stock to aftermarket trans, turbo swap, tuning adjustments to current setup, no major hardware fueling changes. Was all tune around 540pp plus ,no nitro , no suspencion tune ( i haven't the time for this) only the gear box lower to some of them. If you ever want to run less boost than the recorded value, replace the spring and repeat. I think he was going for 3 psi.



To tune a PID use the following steps: Set all gains to zero. but you have made it evident that i will need some sort of fuel management, i was planning on this anyway, but i was wondering how possible it was. EcoBoosted: Finding Another 80 HP in Ford's Twin-Turbo'd 2. 4L-Rotrex Supercharger Kit for the 2. All switching is done by a procedure by the driver with ignition of and is instant. If you absolutely must (and honestly, you really shouldn't, rent a trailer or something) keep your rpm low, stay out of boost entirely and basically granny shift it all the way. Some tuners may tune with meth so there true gas afr is in the lean best tq range. You will have exhaust pop, you will have sluggish low/mid RPM performance. Tuning affects performance and power, sometimes in disproportionate amounts. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Making some boost on stock ecu d15b7 Austin. This replaces the factory installed piece, and will allow you to hold higher boost pressures to redline. ***This log is from the low boost setting of 17psi** Again here is the same bone stock engine EVO 8 from above after a Brewed E-tune using No Lift Shift to keep the turbo spooled while shifting up through the gears. This will help simplify your model and avoid overfitting. Boost your vocabulary! Get the SpanishDict Word of the Day in your inbox. They did email on Monday saying my vehicle had a newer updated Ford strategy code which wasn't in their database and would take a little longer.



So ive been looking into a supercharger for a friend of mine on a tiburon v6. Wow, really missed the boat on this thread. Turbosmart Boost Reference Adapter Ford Fiesta 2014-2017. Fill up your tank with E85 and put the new values in your PCM. Puglia M/A-COM Inc. If boost exceeds this value for more than one second, the JB4 will switch to low-boost Map 4 until the car is restarted. New marine fuel rules to boost diesel prices for at least a year: analysts Marine fuels containing no more than 0. 5 bar approx. Metco Motorsports 2. 2014-2019 Symposer-Port Blow off Valve "kit" no tune needed. Boost is the term that people use to describe the air pressure in the inlet manifold. Hyperopt is a Python library for optimizing over awkward search spaces with real-valued, discrete, and conditional dimensions. For small, low torque motors with little or no gearing, one procedure you can use to get a good baseline tune is to probe it's response to a disturbance. Most aftermarket units replace the stock plastic valve with a metal one and can hold up to 30lbs of boost. I haven't got a tune yet. The PCM supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. There is no service running on the selected channel number. Below is a VX HSV 255kw upper timing table. We traded turbos from a 427 HP and gained I think to 29 psi but it had more smoke at low end than the 400 turbo.



i have recently aquired a new trd supercharger for my 2004 DC V6 auto 4x4 tacoma. While there is no official word how much power an EcoBoost engine can hold, some forum users have reported the 2. Buy online performance chip for your car such as ECU chips, power and Flash programmers and Custom horsepower tuning. This actuator will help eliminate the boost oscillation that is caused by the stock weak actuator. merlins ecuflash evo 7-8-9 tuning guide rev: 1. Manuals & Downloads. So the best you can hope for is to lower the average level a little at that frequency. Low boost is handy for wet greasy days - otherwise run high boost all the time. Apart from an obvious power, torque and fuel economy benefits you get the following advantages with a vehicle ecu remapping: The Chip Tuning Remap is installed over two visits where in the first session we pull the file off the factory ECU, normally without lifting the bonnet, this file is worked on over night where we have no distractions and. They're also charging $3k though. I've been chasing an annoying problem on my 2011 F150. Just my 2 cents. Metco MSI-90D Dual Ba. The process by which a pair of low-energy. Increase fast boost response with two adjustable boost levels. Technical Information OBD1 Boost Tuning. This high-tech tuner helps your ride reach its full potential with custom-tuned power levels for mileage, towing, daily driving and performance. There is a large diameter hose that is invisible from above that comes out of the air filter box. Then down along country road boom CEL, Trac off, and brake override malfunction.



If there is a hole in this part of the intake track, boost pressure will leak out, and the MAP sensor (boost. LC-MS setup Last updated 1/4/2017 University of Washington Proteomics Resource (UWPR) Page 4 Spray voltage on the TSQ: In Tune, adjust spray voltage and position the column tip until spray is stable (no drop outs, NL: stable), remember to save the tune file! Remember to change the spray voltage in your method as well (EZ method only). On the 16's you need a tune to go along with the header as there basically no gains to be made by just adding the header( BRP tuned the ecu much leaner than previous years apparently). Am I telling you have to install this tune? No, I am not. Operating System Enhancements With Real Time Tuning (RTT) Starting with the release of VCM Suite 2. I would expect with those mods alone you'll see an approx. But take it slow and tune in the low map at first. I do plan on getting a tune in the near future but will thier be any negative effects to not having the new exhaust tuned Straight away ? or is it okay for a few weeks ?. ☀Best Prices For☀ Car Suction Cup Windshield Mount for Edge CS and CTS Evolution, Edge Evolution Insight Juice, Edge Juice with Attitude Performance Tuner On Bed Drawer Dresser Storage Bathroom Discount Prices [Low Prices]. For this task, you can use the hyperopt package. While there is no official word how much power an EcoBoost engine can hold, some forum users have reported the 2. He is also an observer, and can spot any potential problems, like a loose timing belt, that the guy in the car has no clue about. No boost leaks. Boost comes in and out. So, setting the timing advance in blinky is a compromise between efficiency and power, but what if we could have our cake, and eat it too?. Raising the federal minimum wage to $15 per hour would raise pay for 27 million workers but also lead to over 1 million job losses, according to Congressional Budget Office (CBO) projections. High EGTs and Knock. A much better way to tune a room is with absorption that reduces the response-skewing reflections that are the root of all these problems. guys are making 170+ whp with that level of boost (properly tuned of course). there was a guy on here playing with a low boost turbo on a tercel but the gains were very minimal. Low Boost No Tune.