cht gauges for air cooled engines

An unmodified Top 80, for example, will have a cruising temperature between 120C - 170C with the TTO CHT gauge, depending on ambient [Log in to Reply] [No Email] Glen in TN 05-20-2003 17:14:26 Report to Moderator Re: Temp Gauge for Air cooled engine? Discussion in 'Thumpers' started by Modron, Apr 11, 2016. Get used to glancing at the CHT often. . When a CHT gauge was offered at the factory (I think on microbuses only) it was just one sender on one head. CHT Kit Specification: Gauge Dimensions:79mm x 43mm x 25mm. By contrast, high EGTs do not indicate that the engine is under excessive stress. Leaner mixtures cause EGT to decrease simply because less fuel produces less energy. Install an Oil Temperature . Leave the old CHT in and add the JPI. I didnt turn that fan on. I am not optimistic that it will be soon. TTO Trail Tech Tachometer/Hour Meter Black #742-A00, TTO Trail Tech Cylinder Head Temperature Meter Black 14mm Sensor #742-ET3 OR 10mm Sensor #742-ET1, TTO Trail Tech Temp. With simple installation and its slick clean look, it makes it be another must have Ural Accessory. thats about 150C. by Amskeptic Mon Apr 11, 2011 3:50 pm, Post Head temperatures are reported to range up to 315C while oil temperature can reach 120C. BLUE LED CHT, 3M SENSOR $58.35 + $14.59 shipping Have one to sell? . So you can figure that fin temperatures are at least 100 degreees below the temp of the average head temperature. trenton irwin high school; larry fink net worth 2020 Menu Toggle. Additionally, paramotor engines are designed mechanically to run at a specified temperature The "missing gauge" on an air-cooled vehicle. Orders are processed in the order that they are received and order fulfillment time varies. I gave this a good deal of thought with my 82 air-cooled, which I really cooked for fun one day in August on the way to Vegas. The short answer is that your maximum head temperature (away from the cooling coils) would be 500 degrees max (probably). The use of VW, Volkswagen and any model names and numbers is for the sole purpose of description of parts application. 16C21. system does not use the expensive but durable "spaghetti wire" for the connection to the thermocouple. 3.675 Cylinder head temperature indicating system for air-cooled engines. you will have to remove (or modify) the rubber seal that goes between the spark plug and the air duct. should never be pulled tight at any point. Proper AFR's will keep you in the sweet spot for mileage, cooling and long engine life. The complaint goes on to state that since 1999, Twin Cam engines between 88 and 110 cubic inches are capable of producing excess heat - enough in fact to cause clothing to catch fire in normal operating conditions. Note: If you must install an oil pressure gauge use GB 264-1/8 tee fitting and GB 265-1/8 pipe nipple to install the factory (Bosch VWA021-919-081B) light sending unit and the gauge . Cylinder Head Temperature (CHT) Limits According to the engine manual, the maximum allowable cylinder head temperature (red line limit) is 500 degrees F. Lycoming states flatly that the maximum redline cylinder head temperature limit must never be exceeded. Temperature Sensor: Cylinder Head 14mm CHT Sensor, 550mm Long. you will know if your engine is running at peak output and when maintenance is required. As a result, we have had to change our BACKORDER FULFILLMENT PROCEDURES. A cylinder head temperature indicator shall be provided for each engine on airplanes equipped with cowl flaps. Home VW T1 Beetle Electrical Beetle Gauges & Senders CHT Gauge, Cylinder head temp 52mm S/Comp Including sender. Re: CHT sensor on an air-cooled engine help. Please only continue if you are prepared to be PATIENT. Once again, red . In addition, the piston, sensor screwed to the back, I had not paid attention to that fan before boy is it uglyplus I dont think it is of any help. tachometer, however, was the "insert type" for pushing into a rectangular opening (red arrows). The cylinder head temperature is just as relevant for air-cooled VW or Porsche engines as the oil temperature, especially with modified engines you should keep an eye on it. the trick is the cool down. Northeast - Middletown, PA Swift Dual CHT 2-1/4 Gauge Kits. sensor ), 4.5mm (3/16") wide black nylon zip ties However, an engine running at A Grubee engine with a standard CDI should have a cold #7 as well as with a Jaguar CDI. Have you ever checked n adjusted the valves, check the compression also . All information should be verified prior to use. If needed, pilots may contact us to order these washers ($1 + free shipping). The completed installation should look like this on a Top 80. NOTE: SOME CYLINDER HEADS (MINARI) HAVE SPARK PLUG HOLE SURFACES 4. a cylinder head with a squish band. An exhaust gas temperature gauge ( EGT gauge or EGT sensor) is a meter used to monitor the exhaust gas temperature of an internal combustion engine in conjunction with a thermocouple -type pyrometer. cooler is better No difference between aircrafts and wee 250cc bikes? As long as CHT is does not exceed the desired target, whatever mixture you have set is fine. which varies widely from manufacturer to manufacturer. K & N Air-Fuel . The Run whatever oil you like, but I'd run SAE 30 and check intake / cooling fins regularly I thought about putting exhaust wrap on it this morning. . Air going through that hose opening will deprive cylinder #5 of cooling air. PRODUCT INFORMATION: All information provided by Aircooled.Net (via website or email) is for USE AT YOUR OWN RISK. Remove the spark plug and cover the hole in the cylinder with a piece of masking tape. One of our engines at Southwest Airsports has an EGT but it has a 12mm Fitting, 3M Sensor Cable. catdoo. 279,00 EUR / each: . and fully adopt the metric. 230C = 450F which is the maximum heat you want on extended runs. I have tried many locations. CHT mainly reflects whats going on in the cylinder during the Otto cycle power stroke before the exhaust valve opens, while EGT mainly reflects whats going on during the exhaust stroke after the exhaust valve opens: High CHTs generally indicate that the engine is under excessive stress for its own good. Originated by Hal Brown in 1972. thats about 150C. The excess tachometer wire and the excess CHT extension wire can be secured to the frame with nylon zip ties. wire with too many turns it will overload the circuitry in the gauge and the gauge may give erratic data. In this case, the overheating was caused by fuel starvation from a clogged Some have used their own NTC (negative temperature constant) resistor epoxied to the head as well. Using this website means you're happy with this. 4.5mm nylon zip ties But we continue to endeavor to answer email inquiries as best we can. You might wonder why more probes and gauges aren't required. While a CHT gauge can also give an indication of mixture strength, it will be slower to react than an EGT gauge because the heat must travel through the mass of the cylinder head. Richer mixtures also cause EGT to decrease because excess (unoxidized) fuel absorbs heat energy when it vaporizes. The use of these terms in no way denotes or infers a direct or indirect connection between Aircooled.Net, Inc. and Volkswagen or any of its subsidiaries. Whats important is the relative value of EGT for a particular cylinder compared to that cylinders peak EGT value. and melted causing the ring to become loose (3rd photo). But after November 15th, all still pending backordered unshipped items will be automatically CANCELLED **(except for any special ordered drop-shipped or made/machined-to-order items). 1/16", V310901 is used to monitor the critical Cylinder Head Temperature If you drill the holes without using a drill press, be We are still processing and shipping orders from our warehouse as normal even while our site is offline. cut in the duct by the spark plug 3/8" long and a width of the space between the fins, as shown in the photo. Fast Response time: 500 msec. The CHT-100 is an advanced Cylinder Head Temperature Sensor for the Corvair Spyder and Corsa models. Nut M6, Various uses [10] N0111165 . wiring harness, and the sending unit, you do not have to purchase these Swift Gauge Dual 2 Inch Round Cylinder Head Temperature 100-7000F | Aircraft Spruce THE AVIATION SUPERSTORE FOR ALL YOUR AIRCRAFT & PILOT NEEDS | 877-4-SPRUCE Home / Instruments / CHT Gauges / Falcon & Swift / Swift Gauge Dual 2 Inch Round Cylinder Head Temperature 100-7000F Swift Gauge Dual 2 Inch Round Cylinder Head Temperature 100-7000F A different engine went over 260 degC with no issues. Midwest - West Chicago, IL And we will continue responding to emails through until early March 2023 because we are wholly committed to resolving any other issues that may arise from previous sales. Tech and Community Help For Air-Cooled VWs. Some engines have a 2-3mm thick copper or aluminum spacer washer on the spark plug in addition to the stock Mount the gauges Use nylon zip ties to mount the gauges on the left side bar. Note: the 10mm sensor is easily deformed by the small diameter spark plug. Install a 10mm flat aluminum washer between the spark Depending on the engine, the cooling air duct may have to be modified in order for the CHT sensor to be mounted underneath the spark plug. This is THE MOST IMPORTANT GAUGE YOU CAN HAVE ON YOUR VW! VDO 250-1650F Pyrometer Temperature (EGT - Exhaust Gas Temperature) Gauge, Cockpit, Black Face, 2 1/16", V310953. Anything that causes ppto occur earlier (i.e., closer to TDC) in-creases CHT, and anything that causes ppto occur later (further from TDC) decreases CHT. Some brands of A Cylinder Head Temperature gauge is the missing gauge on any air-cooled vehicle. 0 of 0 people found the following review helpful: 1 of 2 people found the following review helpful. the thermocouple is mounted under a spark plug. cooler is better. Both give you an idea of your bike's present . Mounted on the left side bar, it is easy to glance These gauges are best used as a REFERENCE, get used to them, and if you see it "too high" one day FIGURE OUT WHY! As the engine works at high speed or uphill, head temperature will increase quickly. Replace the old CHT with an STC'd item and write it up on a 337. easier to remove the faulty gauge if HST is not used to cover both wires. As the engine temperature increases to an excessive level, the piston will begin to expand because it does not cool as efficiently as the cylinder and head. by pinzgauer Thu Feb 19, 2009 9:46 am, Post As the bike moves, air passes across the cylinder fins and reduces the engine's heat to keep it cool. AIR TEAM - Aircraft Parts & Pilot Supplies. As you know I am changing my engine from an air cooled to a liquid cooled engine. Burnt/charred oil can cause the piston ring to bind to the piston lands. That is with high compression (155 psi) and a stock head w/squish band (which causes higher head temps and lower piston temps). Sell now Shop with confidence eBay Money Back Guarantee Get the item you ordered or get your money back. . Some other guys get nervous around 400F, and we can't say this is wrong. It is specifically made and calibrated to provide an accurate reading in the ranges of the VW air cooled engine. CHTs above 400F should be considered abusive, and grounds for doing something right now to bring them down. As the temperature increases If all you have is the factory CHT gauge, then all you know is the CHT of one cylinder (and only very approximately at that) you have no idea how hot the other five are running. What are factors contributing to a higher head temperature? Of course, if pilots have lots of money and like ignorance, who would care? The hottest a two stroke cylinder head should get is 450 degrees continuous running, 500 for short periods. gauges often cannot withstand the vibration found in paramotors and why we recommend that pilots purchase the TTO brand. fuel inlet filter and a worn out fuel pump. Posts: 65. Always use a torque wrench to tighten the spark plug to specifications. (If burned valve fails completely, EGT of affected cylinder will go cold and engine will run rough. FAA. $58.35 + $14.59 shipping VINTAGE PORSCHE VW BEETLE CAR TEMPERATURE GAUGE, BEETLE. $79.25. Items that are not expected to be restocked within 2 weeks WILL BE AUTOMATICALLY CANCELLED. How necessary or useful are CHT and/or EGT gauges in this sort of plane? This is one reason why I consider an engine monitor to be required equipment in any airplane I fly and you should, too. When a CHT gauge was offered at the factory (I think on microbuses only) it was just one sender on one head. e: Contact Us, Company Reg No 2847474 Our site uses advanced code and encryption that is not supported by Microsoft's Internet Explorer Browser. It does vary a lot with the ambient temp. Comes with box and instructions. Pilots who are concerned about this can buy synthetic oils that are not "racing" grade but they cost a lot more. I'm used to always running TrailTech temp gauges on old 2 stroke mopeds. Aircraft Design / Aerodynamics / New Technology, Why battery-powered aircraft will never have significant range, Spar inspection results raise FAA concern. EGT gauges are found in certain cars and aeroplanes. Sender installs over the engine spark plug, typically on cylinder #3. Email care allows us to provide important service detail that can be later referenced by both the customer and our care staff. Fax: 800-329-3020, West - Corona, CA Canada - Brantford, ON, FREE SHIPPING ON ORDERS OVER $350 (USA ONLY - SOME EXCLUSIONS APPLY) | 877-4-SPRUCE, Swift Gauge Dual 2 Inch Round Cylinder Head Temperature 100-7000F, Alcor By Tempest CHT Probe Leads - Type J, Alcor By Tempest Alcal 2000+ System Tester, Electronics International C-1 Single Channel CHT Gauge, Swift Gauge Dual 2-1/4 Cylinder Head Temperature 100-700 F, Alcor By Tempest 2-1/4 CHT Meter - 500F At 8.0 Ohm - Type J FAA PMA, Mitchell Cylinder Head Temp Gauge For Rotax, Swift Gauge Dual 2 Inch Round CHT/Tachometer Gauge 100-7000F/0-8000 Rpm, Alcor By Tempest 2-1/4 CHT / CHT Meter Type J FAA PMA, Swift Gauge Dual 2 Inch Round Cylinder Head Temperature 0-3400C, Swift Gauge Dual 2 Inch Round CHT / Tachometer Gauge 50-3750C / 0-8000 Rpm, Swift Gauge Dual 2-1/4 Cylinder Head Temperature 50-375 C, Swift Gauge Dual 2-1/4 CHT / Tachometer Gauge 100-7000F / 0-8000 Rpm, Swift Gauge Dual 2-1/4 CHT / Tachometer Gauge 50-3750C / 0-8000 Rpm. If pilots want to spend the money and time to install an EGT, do it but I do not think it is . Some air-cooled engines may also have ducts around the engine to keep air flowing . This set up is intended to help the rider maintain engine temperature in check while pushing it to the extremes. If your bike doesn't come with a temperature gauge, you can buy an oil temperature gauge or cylinder head temperature gauge. engine running temperature very quickly whereas a CHT can take 20 seconds to register a change. Alternatively, changing the mixture can affect CHT by changing the rate at which the air-fuel charge burns, and therefore causing ppto occur earlier or later. and why pilots should always use a premium 100% synthetic racing oil. Note: the stock wire on the CHT is short so or 9 o'clock position. because this type of tape quickly smears black goo after it has sat a while. I recommend using centigrade because all paramotor engines are Air-cooled engines rely on natural air to keep the engine cool. Register today and take advantage of membership benefits. The cut is in line with the spark plug hole and perpendicular to the two duct I think the worst we had was one engine that would start detonating at a constant load condition once the plug reached 240 degC. also easily visible on the side bar. When adjusting power settings and mixture, CHT is the most important reference measurement, because CHT is the best proxy we have in the cockpit for internal cylinder pressure (ICP) which represents stress on the engine. CLT / CHT temperature is only really used for warm up and fan reference isn't it? In the evening when it cooled down to around 60 outside my head temperature dropped to 220. You will get an idea The pilot of this engine supplied as with the gauges. In the case of airplanes which do not have cowl flaps, an indicator shall be provided if compliance with the provisions of 3.581 is This leans out the fuel mixture and this is why you increase jetting at lower temps. See, hello all, i'm still working on megasquirting a 1965 vespa. as you can imagine lal the sensors are add-ons and i'm very much starting from scratch. enough to quickly overheat an engine. ring, and cylinder will experience much greater wear. Falcon CHT 2 Inch Round Gauge. It is quite common for different cylinders of the same engine to indicate quite different EGTs, and thats perfectly normal. Alcor By Tempest 2-1/4 CHT / CHT Meter Type J FAA PMA. Fouled or malfunctioning spark plug or ignition wire:Elevated EGT on affected cylinder only (usually by about 50F or so). Busses tend to run much Peak EGT occurs at approximately the stoichiometric (chemically correct) mixture of 14.7 pounds of air for each pound of fuel, at which there is exactly the right amount of oxygen to oxidize all the hydrocarbon chains in the fuel. necessary. Racer71 Pro Posts: 276 Joined: Mon Jun 24, 2019 4:36 pm Consequently, peak EGT can be used to identify a stoichiometric mixture, and decreases in EGT from peak can be used to establish mixtures richer or leaner than stoichiometric (ROP and LOP). 12v connection. Another problem with a cooler hotter temps due to the load they are pushing. East - Peachtree City, GA wheres the evidence to say that that bicycle caught on fire due to excess head temperature? some are even a bit over 500F.. 275C. The temperature it take to ignite gasoline is 495F. I never recommend more than 150psi for these engine, but some after market cylinder heads can easily give 180psi. Of course, if pilots have lots of money and It is better too big than too small. Free Gauge Pod 52mm 2" Water Temp Temperature Gauge Illuminated Indicator Kit UK (Fits: VW) 20.99 Click & Collect (10.50/Unit) or Best Offer Oil Temp Gauge -Smiths New - Classic Air Cooled VW 50.00 Click & Collect 5.25 postage Car 2in1 Water Temperature Temp Voltage Gauge For Ford Vauxhall VW Toyota Honda (Fits: VW) 11.26 Click & Collect Prevent damage to your engine and ensure maximum performance and reliability with this AutoMeter Electronic Cylinder Head Temperature Gauge. Typically, there is a sensor mounted in the exhaust of each cylinder of the engine which allows us to watch each cylinder temperature individually so we can compensate jetting to balance out heat conditions to produce . This type of gauge is commonly preferred to oil or water temperature gauges bymotoringenthusiasts as the performance data is registered quicker. got to get under 300F before you shut down. by Lanval Tue May 10, 2011 10:28 pm, Post More answers below Darrell Ernst Author has 580 answers and 1.6M answer views 3 y Related Out on the road on a 90 day my head temperature runs at about 275 when I get into town with traffic that goes right up to 300 to 320 fairly quickly. the "engine guard" products you see advertised on TV, use a washer temp temp sensor. Detailed Specifications: Engine temperature: For air-cooled machines; attaches to spark plug or engine bolt, Wire length: 550 mm / 21", Diameter: 10, 12 or 14 mm. Tech and Community Help For Air-Cooled VWs, Post You should establish a target CHT that represents the maximum stress you want to place on your engine - 380F works well for most Bonanzas and Barons under typical conditions - and then adjust your power settings, mixture, and (if applicable) cowl flaps to ensure that all cylinders are operating at or below that target. Running the engine too hot will destroy the lubricating properties of the oil. Youre overthinking it, the bike is most likely fine. at hardware stores), 3/8" or 1/2" heat shrinkable tubing (HST), #14 drill (11/64" or 4.5mm) or reamer to widen the mounting holes in the gauges. (see graph below) The picture below is of a motorized bicycle that caught on fire after the owner parked it after a ride and some gasoline dripped onto the cylinder head. shrink wrap around the sensor connection. The first and foremost basic function of a EGT Gauge is to monitor the exhaust temperature that the engine is producing. I put it on there for low speeds through hot areas. air cooled aircraft engines go up to a minimum of something in the 425F range which is about 218C. The maximum for most engines is around 200C (390F) and only for a brief period of less than a minute. than normal running engine is fouling of the piston rings and lands. Previous product. 3. too lean an air/fuel ratio. "Most factory installed cylinder head temperature gauges utilize a bayonet or screw-in resistive type probe that occupies one of the bayonet sockets. Vittorazi, for example, recommends that the 180 Moster reach 120C before flight. You can also use relative EGT to set the mixture to a specific air-fuel ratio that is stoichiometric (peak EGT), richer than stoichiometric (ROP), or leaner than stoichiometric (LOP). IMPORTANT GAUGE YOU CAN HAVE ON YOUR VW! The wasted energy is measured and displayed on a triad of cockpit gauges: oil tempera-ture, cylinder head temperature, and exhaust gas temperature. more). The melting piston began to hit the cylinder head, as well (2nd photo). A Cylinder Head Temperature gauge is the missing gauge on any air-cooled vehicle. Anchorage, formerly Spenard (hub of the universe), (You must log in or sign up to reply here. Contact Us. Finally, a burned exhaust valve can increase EGT if it allows some of the ultra-hot gas during peak-temperature phase of the power stroke to leak past the valve and impinge on the EGT sensor probe located a few inches beyond the cylinders exhaust port. Trail Tech will continue to invent and develop improved, quality products for the benefit of the Power sport community, CHT (Cylinder Head Temperature) Sensor for air cooled machines. JavaScript is disabled. them and could guess when maintenance is due, but then. Why not have an exhaust temperature gauge (EGT), as do general aviation (GA) aircraft? In all the air cooled motorcycles I've tested at work I would say that, in general, under heavy load conditions 230-250 degC is an acceptable plug temperature. For a better experience, please enable JavaScript in your browser before proceeding. The CHT wire is delicate and The gauge measures in Celsius up to 1300c or 2372 Fahrenheit Easy installation. Be very careful not to twist the sensor/wire assembly when tightening the spark plug. CHT measures heat energy wasted during the power stroke, when the cylinder is under maximum stress from high internal pressures and temperatures. VAT Reg No GB 5582 14927 Hopefully, they will get this fixed soon. There are two Thermocouple lengths - 4.5m and 6.6m - with cables suitable for 12mm and 14mm Sparkplug fixings. I'd consider but I prefer analog. The tachometer electronics are very sensitive and will always pick up the spark. This gauge kit comes WITH the engine and where the wires are connected to the side bar. Two additional wires are required for the gauge power. VDO 600F Cylinder Head Temperature (CHT) Gauge, Cockpit, Black Face, 2 1/16", V310901. The Cylinder Head Temperature Gauge measures the temperature of the cylinder head of an engine, commonly those that are air-cooled. used as a REFERENCE, get used to them, and if you see it "too high" one The three most popular gauges, cylinder head temperature (CHT), oil temperature (OT) and oil pressure (OP), all have accuracy issues but they are useful for trending and preventing meltdown. unfortunately they only read up to 125deg, but somethign similar would be ideal Engine Guard - Product Overview - Engine Guard basically this.. "cylinder head temp gauge" VDO 12v DIGITAL CYLINDER HEAD TEMP GAUGE KIT 4WD TRUCK | eBay We serve the VW parts and VW Tech needs of owners of aircooled Type 1 VW Beetle, Karmann Ghia, Type 181 Thing, Type 2 Volkswagen Bus, Type 3 VW Squareback / Fastback / Squareback, and Type 411 & 412 Volkswagens. The method used to mount the gauges are the same on any Miniplane frame. Remove the spacer washer, if there is one, and put it aside for the moment. THAT ARE NOT FLUSH. But there are a number of other factors that also affect CHT. There are cylinder head temp and oii temp gauges made for air-cooled VWs that would work. Bottom line: a cool running engine will last longer and have fewer problems. Attempt to unclog by going to full-rich mixture and high boost; otherwise, land as soon as practicable. 200 degC on a spark plug is no problem. Sensor id Ring Size 14mm. Burnt oil EGT is also affected by ignition performance. Get too hot too many times and pull the bus over without running it to cool it and the valve seat falls out. Attach the wiring A typical Miniplane frame, for example, requires about 17" of HST to enclose the gauge wires. Megasquirt 2 / Microsquirt / Microsquirt module, MS2/Extra, MS2, Microsquirt and Microsquirt module support, Re: CHT sensor on an air-cooled engine help. Confirm by doing an in-flight mag check; note which mag causes affected cylinder EGT to go cold. I very seldom refer to EGT when I lean my engines; I use fuel flow to get somewhere in the ballpark, and then fine-tune by reference to CHT. In case one of the gauges goes bad, it is black. For more information on the new gauge, other specialist gauges or our range of SMITHS-branded instruments, pleasecontact us via: You can also follow us on social media for regular news updates, photographs and technical information: Posted by Paul Fears on Denser air increases the air drawn per stroke, once that air reaches engine temp. Consider confirming by doing an in-flight mag check, but be careful if you turn off a mag and the engine quits, pull the mixture control before turning the mag back on to avoid possible afterfire-damage to the exhaust system. A properly installed CHT gauge can help prevent this sort of catastrophe and prolong the life of your engine. It's normal. What does the spark plug look like. CAR 3.675 Cylinder head temperature indicating system for air-cooled engines. A Cylinder Head Temperature gauge (CHT) measures the cylinder head temperature of an engine. 57 mm. Generally the higher the load, the higher the plug seat temperature, even with more cooling air. **UPDATE*** WE ARE NO LONGER KEEPING LONG TERM BACKORDERS OPEN FOR LATER FULFILLMENT!! Limiting EGTs accomplishes nothing useful. You can find out more about the cookies used by clicking this link. Please trust that even when we can't reply to your email promptly, we are continuing to work to fulfill your Order Request as best we can, and we will contact you at any point where we have any new information that is not already posted in your online Order Progress/History area in your customer account. Do not drill holes in the side bar in order to mount the gauges because it could That fan might be a problem if its blowing air onto the motor. Since even a badly burned valve permits only a tiny amount of gas leakage, the EGT increase caused by a burned exhaust valve is usually quite small (typically a 20F to 60F rise of a 1400F to 1500F EGT) and quite easy to miss unless you really pay attention. In most cases we are able to honor advertised price, but in the RARE case a substantial price increase occurs, you would be notified and given the option to cancel. Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro, Quick links: Manuals : Megasquirt info