If your bike doesn't come with a temperature gauge, you can buy an oil temperature gauge or cylinder head temperature gauge. Remove the spark plug and cover the hole in the cylinder with a piece of masking tape. You can find out more about the cookies used by clicking this link. The final approval tests went exactly as planned and we are thrilled to further extend our range of gauges for classic cars and motorcycles.". If needed, pilots may contact us to order these washers ($1 + free shipping). Denser air increases the air drawn per stroke, once that air reaches engine temp. Manufacturer; Certification; Size; Alcor. if it was 100 F outside, your VDO gauge would read 30 F low, you would need to add 30 F to the gauge readout to determine your true CHT; if the ambient temps are colder than 70 F, then the gauge reads high, and you need to subtract the difference from the gauge readout. Aircraft engines can provide thousands of hours of reliable service, provided that they are maintained and operated properly. THE SENSOR MUST BE ORIENTED SO THAT THE FLAT AREA OF THE SENSOR ENTIRELY CONTACTS THE FLAT AREA AROUND THE SPARK PLUG HOLE. 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. If LOP mixture, reduced EGT and CHT on affected cylinder, and possible engine roughness. The Thor engines do not require any air duct modification but . This installation does not have a full length piece of HST to cover the gauge wires. CHT Kit Specification: Gauge Dimensions:79mm x 43mm x 25mm. Their Be very careful not to twist the sensor/wire assembly when tightening the spark plug. 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 This leans out the fuel mixture and this is why you increase jetting at lower temps. Use the drill bit or reamer to widen the holes in the gauge so that the ties will fit through the holes. The method used to mount the gauges are the same on any Miniplane frame. EGT gauges are found in certain cars and aeroplanes. Copyright 2021, Savvy Aviation, Inc. All rights reserved. Malfunctioning magneto:Elevated EGT on all cylinders (usually about 50F or so). Both are horizontally-opposed air-cooled designswith bolt-together aluminum case halves and bolt-on cylinders with sandcast aluminum headsscrewed onto nitrided steel barrels. Someday, the U.S. will abandon the antiquated, difficult to use English system of measurement 24" extension lead #V300-24(The extension MUST be That's more concerning and being hopefully handled by a small oil cooler and a switch from 0W-40 to 20W-50 Mobil 1. High EGTs do not represent a threat to engine longevity. . Figure 6: Cylinder head temperature gauges. That fan might be a problem if its blowing air onto the motor. An unmodified Top 80, for example, will have a cruising temperature between 120C - 170C with the TTO CHT gauge, depending on ambient the "engine guard" products you see advertised on TV, use a washer temp temp sensor. Barrel temperatures would be about 100 degrees less. The CHT gauge kits consist of a sensor and the gauge itself. Central - Fort Worth, TX We are now only fulfilling order requests only for items that we have in stock OR that we know can be acquired within a defined timeframe. 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. Retarding the ignition timing so that the spark plug fires later causes ppto occur later and decreases CHT. Power Products. 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. Attempt to unclog by going to full-rich mixture and high boost; otherwise, land as soon as practicable. You are using an out of date browser. air cooled aircraft engines go up to a minimum of something in the 425F range which is about 218C. ring, and cylinder will experience much greater wear. New TechnologyNewsProduct Launches, Caerbont Automotive Instruments Ltd. Normal head temperature is 265 to 285. You might wonder why more probes and gauges aren't required. 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. As the engine works at high speed or uphill, head temperature will increase quickly. manufactured outside the U.S. and the temperatures specified are always given in centigrade. Mount the gauges Use nylon zip ties to mount the gauges on the left side bar. c.) Tachometer sensor wire location The RED tachometer sensor wire may be shortened as needed and loosely wound around the secondary (spark plug) wire 3 or 4 turns. Leaner mixtures cause EGT to decrease simply because less fuel produces less energy. Bosch CHT from an EFI beetle or van. *** Supply-chain disruptions have hampered our ability to acquire/restock items reliably, and a lack of backorder ETA information is the frustrating "new normal" for our hobby. Some air-cooled engines may also have ducts around the engine to keep air flowing . As long as CHT is does not exceed the desired target, whatever mixture you have set is fine. Last summer mine got so hot, that I couldn't kill the engine with the kill switch nor removing the spark plug cable. The holes in the gauges are slightly smaller than the width of the ties. Always have a small loop between the This is a piston from an overheated Top 80 engine. How necessary or useful are CHT and/or EGT gauges in this sort of plane? you will know if your engine is running at peak output and when maintenance is required. Home VW T1 Beetle Electrical Beetle Gauges & Senders CHT Gauge, Cylinder head temp 52mm S/Comp Including sender. (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. I would also monitor all 4 cylinders. THAT ARE NOT FLUSH. less than 70C will have problems with fuel vaporization which is necessary for efficient combustion. 200C is 392F. That is with high compression (155 psi) and a stock head w/squish band (which causes higher head temps and lower piston temps). enough to quickly overheat an engine. The TTO gauges and the CHT extension are available from Miniplane-USA. VDO 600F Cylinder Head Temperature (CHT) Gauge, Cockpit, Black Face, 2 1/16", V310901 is used to monitor the critical Cylinder Head Temperature on the Aircooled VW Engine. by hambone Sun Apr 03, 2011 7:08 pm, Post This is not so with a paramotor. Aluminum melts around 1500 F. Therefore, attempting to limit EGTs in an attempt to be kind to the engine is simply wrongheaded. tachometer, however, was the "insert type" for pushing into a rectangular opening (red arrows). The CHT gauge on a TCMengine usually has a green arc from 200F to 460F, with a red-line at 460F. 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. This Aviation Grade Cylinder Temperature Gauge offers reliability and easy to read needle display up to 700F. Orders are processed in the order that they are received and order fulfillment time varies. Stow the extra wire lengths in loops just below the side bar attachment system does not use the expensive but durable "spaghetti wire" for the connection to the thermocouple. Skip to content. So you can figure that fin temperatures are at least 100 degreees below the temp of the average head temperature. From a powerplant management perspective, its crucial to understand that CHT and EGT tell us quite different things about whats going on inside the engine. 3. too lean an air/fuel ratio. Our site uses advanced code and encryption that is not supported by Microsoft's Internet Explorer Browser. on the throttle increases the risk of catching the throttle on the risers, glider lines, or straps. PRODUCT INFORMATION: All information provided by Aircooled.Net (via website or email) is for USE AT YOUR OWN RISK. You will get an idea can used to attach the sensor wires or HST assembly to the side bar as illustrated below up to the frame attachment point. Itinerant Air-Cooled. e.) Spark plug reinstallation Put the CHT sensor on the spark plug and then the spacer washer, if there is one. We will not drive without one! Made in the USA. for Spark Plug M14 919 085 113C available from stock. by kritip Mon Feb 16, 2009 3:57 pm, Post "Might as well while the engine is out" install senders for a CHT gauge. What's a safe maximum temp on a force/fan air cooled small 125cc/232cc all aluminum engine? When a CHT gauge was offered at the factory (I think on microbuses only) it was just one sender on one head. One purpose of the dual ignition system on an aircraft . 4TN86CHT-MYEM Water Cooled Diesel Engine << Back to all water cooled engines. Some other guys get nervous Burnt/charred oil can cause the piston ring to bind to the piston lands. A Cylinder Head Temperature Gauge (CHT) measures the temperature of an engine's cylinder heads. at the gauges without taking your eyes off where you are going. JavaScript is disabled. weaken important structural materials. Using this website means you're happy with this. 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. That's a good price. used as a REFERENCE, get used to them, and if you see it "too high" one That said the CR Machine Manufacturing billet cylinder head never sees the engine reaching over 230 degrees Celsius, due to it's significantly large cooling surface area compared to the standard cylinder head and other billet cylinder heads that i have tried. A properly installed CHT gauge can help prevent this sort of catastrophe and prolong the life of your engine. There is just enough room between the fins for the sensor to fit. Smaller ties could be used but they are likely to break which is why the 4.5mm ties should be used. to do and could harm the engine. Leave the old CHT in and add the JPI. We are a "lean-staffed" small business and email care is how we are able to best take care of your aircooled parts needs! In case one of the gauges goes bad, it is like ignorance, who would care? This engine had HST installed over both gauge wires which is the best way because there is less chance of the wires being snagged. Slightly reduced CHT on affected cylinder. A cooler spark plug only makes the plug cooler , not the motor. Some aftermarket temperature sensors and overheat warning systems have become available over the years. They simply indicate that a lot of energy from the fuel is being wasted out the exhaust pipe rather than being extracted in the form of mechanical energy sent to the propeller. The temperature it take to ignite gasoline is 495F. Sensor id Ring Size 14mm. by Matt Cramer Mon Feb 16, 2009 10:43 am, Post With the engine completely warmed up, grab the dip stick and pull it out. Millions of air-cooled VW cars got by with just oil pressure, oil temperature, and generator/alternator warning lights and little else. PRODUCT IMAGES are representative only. Anchorage, formerly Spenard (hub of the universe), (You must log in or sign up to reply here. 200 degC on a spark plug is no problem. Always use a torque wrench to tighten the spark plug to specifications. Never use black electrical tape to affix the gauge cables These engines were highly stressed and it did not take much of a change to melt a piston or worse. These gauges are best used as a REFERENCE, get used to them, and if you see it "too high" one day FIGURE OUT WHY! Highly accurate and durable thanks to AutoMeter's patented air core meter movement, a single wire, 1/8" NPT temperature sender is included. A cylinder head temperature gauge (CHT) is an essential tool used to monitor the running temperature and health of any air-cooled engine. gauges often cannot withstand the vibration found in paramotors and why we recommend that pilots purchase the TTO brand. hotter temps due to the load they are pushing. Mike Busch's books, articles, webinars, and other resources from Savvy Aviation, Inc. must have the sensor at the 8 The max oil temp is 261F. 3. Midwest - West Chicago, IL used on the Top 80 and most other motors. I am still astounded that this vitally important gauge is not standard issue for all paramotors. I appreciate your viewpoint but really I think you need to have a temperature gauge on your engine to really know what is going on with it. and melted causing the ring to become loose (3rd photo). UMA. . "Our design team worked closely with an important German customers. The first reason is that it is rarely PORSCHE PARTS & BOOKS; MERCEDES PARTS; EMPI; Wescom Tractor; Workshop; About; Clearance. 2. The additional fuel compensates for the additional air. by Robert Hodge Sun Feb 15, 2009 6:58 pm, Post 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 We ONLY charge for items that are available to be shipped in a timely or reasonably reliable timeframe. Please check the boxes for the options that you would like to add. should never be pulled tight at any point. Would A-M create an Air Cooled CYL HEAD Temp gauge 140 . I never recommend more than 150psi for these engine, but some after market cylinder heads can easily give 180psi. . As a result, we have had to change our BACKORDER FULFILLMENT PROCEDURES. by Lanval Tue May 10, 2011 10:28 pm, Post CLT / CHT temperature is only really used for warm up and fan reference isn't it? which varies widely from manufacturer to manufacturer. FAA. We appreciate your continued support and understanding. First of all I have mostly built water cooled race engines and a few air cooled engines. much more than a CHT and is complicated to install on a paramotor. Replace the old CHT with an STC'd item and write it up on a 337. Just happened to be the right size. K & N Air-Fuel . AIR TEAM - Aircraft Parts & Pilot Supplies. If you wind the pickup The wasted energy is measured and displayed on a triad of cockpit gauges: oil tempera-ture, cylinder head temperature, and exhaust gas temperature. Register today and take advantage of membership benefits. how? Replace the old CHT with a non-STC'd replacement and get it field approved on a 337. poadeleted20, Oct 7, 2009 #8 Install gauge in dash or in VDO gauge mounting pod. 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. The location shown here is the best and will result in the least wear and tear on the sensor wires. Commonly used on air-cooled engines, the head temperature gauge displays the work that the engine is performing more quickly than an oil or water temperature gauge. If I had a 2.0 air cooled engine, I would want to monitor exhaust temp more than head temp. wire with too many turns it will overload the circuitry in the gauge and the gauge may give erratic data. I have been told by some guys in the UK that the Megasquirt system has problems with air cooled . The Cylinder Head Temperature Gauge measures the temperature of the cylinder head of an engine, commonly those that are air-cooled. Click to enlarge. $79.25. Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro, Quick links: Manuals : Megasquirt info (use commercial grade which is available in the electrical dept. plug and the sensor. A cylinder head temperature indicator shall be provided for each engine on airplanes equipped with cowl flaps. the trick is the cool down got to get under 300F before you shut down. Alaska - Wasilla, AK have the means to quickly and radically change the air/fuel mixture during operation. Swift Dual CHT 2-1/4 Gauge Kits. You may never need Cylinder Head Temperature Gauge ''Cockpit-Style'' 52mm. I have tried many locations. The CHT can be setup with either Fahrenheit or centigrade. The excess tachometer wire and the excess CHT extension wire can be secured to the frame with nylon zip ties. 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. Fax: 800-329-3020, West - Corona, CA Panel Cut: 76.5mm x 39.2mm. Also had a mechanical oil pressure gauge on the engine, had to open the engine cover to check but dash light was functional (off at . These gauges are best When a CHT gauge was offered at the factory (I think on microbuses only) it was just one sender on one head. CHT measures heat energy wasted during the power stroke, when the cylinder is under maximum stress from high internal pressures and temperatures. A Cylinder Head Temperature gauge is the missing gauge on any air-cooled vehicle. Advanced ignition timing that ignites the air-fuel charge earlier and causes ppto occur earlier decreases EGT. Items that are not expected to be restocked within 2 weeks WILL BE AUTOMATICALLY CANCELLED. Complete installation instuction included in gauge kit. The engine is simply not capable of producing EGTs that are high enough to harm anything. by Morgoon Wed Apr 06, 2011 3:03 am, Post Bosch CHT from an EFI beetle or van. Exhaust temperatures would be less than 600F. Install an Oil Temperature . Vittorazi, for example, recommends that the 180 Moster reach 120C before flight. You obviously need an engine monitor to measure the CHT of all six cylinders (or twelve if you fly a twin). It is quite common for different cylinders of the same engine to indicate quite different EGTs, and thats perfectly normal. 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. 16C21. cannot lubricate engine parts. The piston ring lands got so hot that they separated CAR CYLINDER HEAD TEMPERATURE GAUGE KIT, CHT. Never checked compression though. Aircooled.Net, Inc. is in no way affiliated or associated with Volkswagen AG or Volkswagen ("VW") of America. 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 . I put it on there for low speeds through hot areas. point. easier to remove the faulty gauge if HST is not used to cover both wires. Email care allows us to provide important service detail that can be later referenced by both the customer and our care staff. Fast Response time: 500 msec. I am going to have EGT gauges. Either richening or leaning the mixture from that point decreases the burn rate, causes ppto occur later, and consequently reduces CHT. 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. We provide the classic VW hobby with tech tips, project advice, and quality parts for VW Restoration, VW Performance and Custom Aircooled VW projects. Join Date: Jan 2011. Recall that during the Otto cycle power stroke, peak internal cylinder pressure and temperature optimally occur at 15 to 20 of crankshaft rotation after top dead center a point denoted by pp. About half the fuels energy goes out the exhaust pipe, while the remaining one-sixth is transferred to the cooling air that passes over the cylinder fins and through the oil cooler. While you are at it, you should also install a tachometer/hour meter gauge. Other engines are similar. People who have had cracked cylinder heads probably didn't even know their engine was overheating. Reason I'm asking this is because this engine has CHOKED / tapered cylinders up towards the combustion chamber. has to be monitored closely or the pilot may burn up his engine. Both give you an idea of your bike's present . . Bultaco74 said: EGT is also affected by ignition performance. Burned exhaust valve:Slightly elevated EGT on affected cylinder only (usually by about 20F to 60F, depending on how badly the valve is burned). 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. 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 For a better experience, please enable JavaScript in your browser before proceeding. A Make your product selections based on the PRODUCT DESCRIPTION and OPTION INFORMATION presented in the detailed product listing. One caveat: Turbocharged engines usually have a turbine inlet temperature (TIT) red line that should be observed, particularly when flying at Flight Level altitudes. We rely heavily on email as the most efficient and accurate way to serve our customers. ). Always do a thorough test of the fuel delivery system before assuming there are ignition or Customer Service: 800-861-3192 them and could guess when maintenance is due, but then. Why not have an exhaust temperature gauge (EGT), as do general aviation (GA) aircraft? Also, at higher elevations, you . 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. 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. 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. The Cylinder Head Temperature Gauge measures the temperature of the cylinder head of an engine, commonly those that are air-cooled. Would you own a car that did not have an odometer nor a temperature gauge? Racer71 Pro Posts: 276 Joined: Mon Jun 24, 2019 4:36 pm All wiring must have some slack to allow for flexing of the side bar. There are cylinder head temp and oii temp gauges made for air-cooled VWs that would work. The tachometer electronics are very sensitive and will always pick up the spark. Another problem with a cooler By monitoring EGT, the driver or pilot can get an idea of the vehicle's air-fuel ratio (AFR). Abercrave around 400F, and we can't say this is wrong. 200C is 392F. 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). $135.75. Hopefully, they will get this fixed soon. 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. It is also good to have an hour meter/tachometer so conditions and altitude. Not sure yet whether I'll go for a single gauge with a switch, two gauges, or a dual gauge; I'll worry about that later. Tech and Community Help For Air-Cooled VWs, Post VDO Cylinder Head Temperature (CHT) 14mm Sending Unit, V323701 is used to monitor the critical Cylinder Head Temperature on the Aircooled VW Engine. It was running like a diesel-auto ignition. VAT Reg No GB 5582 14927 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. f: 01639 732201 of how your engine operates in various conditions, which is important! by Robert Hodge Mon Feb 16, 2009 12:46 pm, Post Some engines have a 2-3mm thick copper or aluminum spacer washer on the spark plug in addition to the stock Previous product. careful because the bit can snag the plastic and split it. 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. For this reason, engine exhaust temperature Click to download the VDO installation guide in .pdf format. A Cylinder Head Temperature gauge (CHT) measures the cylinder head temperature of an engine. Whats important is the relative value of EGT for a particular cylinder compared to that cylinders peak EGT value. 1/16", V310901 is used to monitor the critical Cylinder Head Temperature But to make a very long story short, heres a list of common engine problems and how they show up in CHT and EGT: CHT and EGT may also be used to detect abnormal combustion events, including detonation and pre-ignition. Air-cooled engines rely on natural air to keep the engine cool. cylinder head (which is not always possible on some engines). Checked and adjusted valves about 10k km ago. RePower. For a better experience, please enable JavaScript in your browser before proceeding. Northeast - Middletown, PA Megasquirt 2 / Microsquirt / Microsquirt module, MS2/Extra, MS2, Microsquirt and Microsquirt module support, Re: CHT sensor on an air-cooled engine help. $58.35 + $14.59 shipping VINTAGE PORSCHE VW BEETLE CAR TEMPERATURE GAUGE, BEETLE. That's quite an oversight for an air cooled engine that is prone to self-destruction from running too hot. The short answer is that your maximum head temperature (away from the cooling coils) would be 500 degrees max (probably). temperature when correctly tuned. I'm putting a sender on each of #1 and #3. . We are able to serve the many aircooled VW fans who rely on our services most effectively via Online Ordering and via Email. the trick is the cool down. 4.5mm nylon zip ties The wire from the CHT must not touch the cooling duct so be sure to make the slot big enough. Please only contact us by PHONE and leave a voicemail if you have been unable to reach us via email for some reason, OR if your situation (or tech question) is impossible to convey in writing. This gauge kit comes WITH the wiring harness, and the sending unit, you do not have to purchase these separately unless you want to have spares! Toll Free: 877-477-7823 You can email to cancel un-shipped/un-paid items at any time as long as they are not direct-shipped, special order or made/machined-to-order. If pilots want to spend the money and time to install an EGT, do it but I do not think it is I would hesitate in saying that an air cooled engine runs hotter than a water pumper, and in good tune with all the cooling system . Do I need to run CHT guages? Busses tend to run much hotter temps due to the load they are pushing. SA9 1SH, t: 01639 732200 This is THE MOST IMPORTANT GAUGE YOU CAN HAVE ON YOUR VW! NOTE: SOME CYLINDER HEADS (MINARI) HAVE SPARK PLUG HOLE SURFACES Additionally, paramotor engines are designed mechanically to run at a specified temperature Yo can just bridge it with a fixed resistor, and the IAT will do the work for the fuelling? e: Contact Us, Company Reg No 2847474 Some other guys get nervous around 400F, and we can't say this is wrong. Of course, if pilots have lots of money and like ignorance, who would care? 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. problem being, it's a pretty well closed ducted fan setup on a pretty compact engine. This is the culmination of two-year's design work with a focus on developing a gauge to replace older technologies for measuring the temperature of the cylinder head in air-cooled engines. Cylinder Head Temperature GaugeGaugeNew Product, Categories: These are. Remove the spacer washer, if there is one, and put it aside for the moment. The problem of the type 4 heads is valve seat material which doesn't have the best expansion rate in a aluminum head. The external surface of each cylinder is fitted with a number of fins, which act as heat sinks, dissipating the heat into the air. I'd consider but I prefer analog. One of our engines at Southwest Airsports has an EGT but it has a CHT (Cylinder Head Temperature) is often monitored on air-cooled engines because there is no coolant. esky CZK Slovensky EUR Franais EUR Italiano EUR Deutsch EUR Polski PLN Norsk EUR Tamil USD Hungarian HUF Russian USD. With simple installation and its slick clean look, it makes it be another must have Ural Accessory. EGT usually varies between normal and slightly elevated, often (but not always) in a rhythmic fashion with a frequency of roughly one or two cycles per minute. I use a infrared thermometer pointed near the spark plug, not at the spark plug.