Below are the 4 most recent journal entries recorded in staceywilkin921's InsaneJournal:

Monday, October 10th, 2011
7:51 pm	Volumetric Efficiency of a Rotary Motor Explained rotary 13b engine Well, today I lastly gave up and decided to do a tiny experiment that I identified even though seeking for an useful technique to determine Volumetric Performance on a automobile without having possessing to yank the motor from the auto. I arrived across the adhering to experiment: Calculating your vehicles volumetric effectiveness I will presume that you are either much too lazy or worn out to follow the website link, so I will describe a bit on what does the experiment entail. The experience requires the adhering to: (one)automobile with an engine (one)OBD-II Scan Tool (1)stock air consumption with a Mass Air Flow sensor (MAF) in stock trim -in accordance to the writer, a minor variance from factory stock, such as taking away the display screen or repositioning the sensor will give the experiment minor value- (one)stretch of private, safe and sound, deserted road. As soon as you've acquired all these things the procedure is rather painless. Attach the scan instrument to the motor vehicle and make confident it can report the following issues: Motor RPM, Intake Air Temperature & Air Movement. Making use of the deserted stretch of personal road, operate the motor vehicle from a lower engine rpm (2500rpm) @ WOT to redline (or as far as you want your sample to go..) although recording Consumption Air Temperature (IAT), Engine Speed (RPM) & Consumption Mass Air Circulation (IMAF). Once you have your knowledge logged, re-go through the experiment from the website link supplied and start off crunching numbers! Its principle appears straight forward: centered on the calculated theoretical volumetric air flow for your engine (a Renesis in this circumstance), and the data you logged, you can approximate the real VE of your particular engine. I will present the formulas I utilised at the finish of this write-up. For now, let us take a search at this chart [http://www.myrotarycar.com/mazdarx8/images/13B.MSP.Volumetric.Performance.020205.a.gif]. Theoretical Volumetric Air Flow was calculated assuming that a 13B MSP rotary engine has similar displacement in 720º of crankshaft rotation as a two.six Liter, 4 stroke piston motor. Discover how VE climbs as Engine Pace boosts, right up until it reaches 5500rpms. This is were the engine is rated to generate peak torque, as a result its protected to assume that VE will peak at or close by 5500rpms. Moreover, you can securely presume that Volumetric Effectiveness plotted from motor velocity will mimic the shape and traits of the torque curve created by the engine. Be aware that the plotted VE is somewhat linear: will start @ 80% and climbs its way to a tad above 100%. If this experiment's benefits could be validated and the parameters I used had been correct, it would signify that the Renesis engine -on my vehicle at least- is in simple fact extremely effective for a normally aspirated inner combustion powerplant -VE definition over. Calculating Volumetric Efficiency (VE) for the Renesis (13B MSP) rotary engine: We will use the adhering to values obtained throughout our data log: Knowledge: Intake Air Temperature (IAT) = 82ºF Motor Speed (RPM) = 8561rpm AirFlow (MAF) = 27.3lb/minute THEORETICAL AIRFLOW CALCULATION: Formulation: [(ED) x (rpm) x (VE)] / [(ES) x (C)] = TAF Variables: ED = Engine Displacement [in³] rpm = Engine Pace [RPMs] VE = Volumetric Effectiveness [%] ES = Engine Stroke Coefficient [#] C = Conversion coefficient from in³ to ft³ (Comment on this)
7:45 pm	Mazda RX-7 Series - A Retrospective Seem rotary 13b engine Without the perseverance of a staff of Japanese motor engineers and designers underneath the leadership of Kenichi Yamamoto, in the development of the Wankel or rotary motor, this stunningly developed, high functionality passe-temps vehicle, would never have transpired. In 1961 the Japanese Business Toyo Kogyo, later to be renamed Mazda, accredited from the patent proprietors NSU-Opel of Germany, the full rights to produce a new rotary motor. The Rotary engine was named after its inventor Wankel and had no aide or crankshaft as these, but consisted of a straightforward fuel injected rotor blade that span close to a central drive-shaft that was linked to a rear wheel differential for generate. In theory the rotary motor is far superior, through its simplicity in design and style, than a typical piston combustion motor, with considerably a lot less moving parts to go incorrect and direct drive energy output. Yamamoto's group at Mazda set to perform on establishing a rotary motor that would conquer the issues of reduction of compression, exhaust, and the overheating of the rotor blades tips, that had minimal Opels good results at building the technology in the 1950's. Following achievement with before RX types the RX-2, RX-3 and RX-5 and despite financial troubles at the firm, Mazda eventually arrived up with the larger 12A motor which was fitted to the new Mark 1 RX-7 built from 1978 until 1980 and the sequence 2 developed from 1981 to 1983. The Mazda Rx-7 was a two seater plus two hardtop sports coupe, curvaceous and aerodynamic and it instantly caught the imagination of the motoring world which globally hailed it as an immediate design and style classic. The design of the auto was developed entirely close to the motor and exhaust configuration. A bi-rotor engine placing out what was seen as equal of just 550 bhp for each rotor the 12A in the RX-7 was capable of speeds of over 130 mph and with substantial reduced-conclude torque reached from to sixty mph in just six.three seconds. Formally its bhp was just 100 horse energy but provided how mild the auto was, it was often described as like driving a skateboard, the power to fat ratio gave it an output equal to 230 bhp. Exhilarating to drive since of the smoothness inherent in the motion of the Wankel rotary motor, tiny vibration or shaking was felt at substantial engine speeds. An alarm was fitted to the rev counter to warn the driver when the 7000 rpm redline was approaching. If you exceeded it or did not heed the alarm the engine would lower out to safeguard the ceramic rotor tips from overheating. The automobile was high-priced to run, the engine consuming about 20 miles to the gallon but at 50 percent the cost of a Porsche and with all the trimming these as electric windows and sun-roofs, the RX-seven was sought by younger and previous alike. More than 475,000 autos had been offered with the unique Mark one style. The RX-seven was loved by good and negative alike and appeared in a lot of Television exhibits, commercials and films. In Japan the automobile was adopted by the original Tokyo Drifters and street racers because of to its speed and dealing with. (Comment on this)
7:39 pm	rotary 13b engine rotary 13b engine The RENESIS rotary motor is the up coming generation of rotary motor that powered the RX-seven, retaining the power of the prior rotary model 13B-REW, holding onto all the power of the RX-7, whilst escalating fuel economic climate and lowering emissions, even though the rotors weigh about 14% significantly less than the kinds used in the engine of the RX-seven. The RENESIS motor also has its consumption and exhaust ports in the aspect housings, which makes it possible for far better warmth dissipation and a lengthier electrical power stroke. RENESIS also passe-temps a six port induction technique, referred to as 6PI. Every rotor utilizes 3 of the ports, and each and every also uses a variable intake timing mechanism, which allows it to increase compression efficiency at both substantial and reduced speeds. In addition, the RENESIS has two exhaust ports for every rotor. This permits a substantial reduction in exhaust resistance. Each the automated and guide types have a 1.three liter, two rotor rotary engine, able of 159 lb-ft of torque at 5500 rpms and are able of a displacement of 1308 cc and a compression ratio of ten.: 1, becoming confident you'll get a whole lot of power for your dollar. The fuel economic climate is improved from the RX-7 as well... this car averages sixteen mpg in the metropolis and 22-23 on the freeway (23 for the sport automatic, 22 for the handbook transmission). In summary, the engine of an RX-eight is a wonderful piece of machinery, and if you take care of it, it will take care of you for a long time to appear. Hailed by many as the most beautiful automobile at any time to appear out of Japan, The Mazda RX-7 took seventeen a long time of growth prior to it finally appeared on the streets in 1978. With out the perseverance of a staff of Japanese motor engineers and designers under the leadership of Kenichi Yamamoto, in the development of the Wankel or rotary engine, this stunningly designed, large overall performance passe-temps automobile, would in no way have took place. In 1961 the Japanese Firm Toyo Kogyo, later to be renamed Mazda, licensed from the patent proprietors NSU-Opel of Germany, the complete rights to build a new rotary motor. The Rotary engine was named soon after its inventor Wankel and had no aide or crankshaft as this kind of, but consisted of a basic fuel injected rotor blade that span around a central drive-shaft that was linked to a rear wheel differential for generate. In theory the rotary motor is far superior, by means of its simplicity in design, than a traditional aide combustion engine, with significantly less heading areas to go incorrect and immediate drive electricity output. Yamamoto's group at Mazda set to function on building a rotary engine that would get over the issues of reduction of compression, exhaust, and the overheating of the rotor blades ideas, that had constrained Opels success at building the technologies in the 1950's. Right after success with before RX types the RX-two, RX-3 and RX-five and regardless of fiscal difficulties at the company, Mazda lastly came up with the bigger 12A engine which was fitted to the new Mark one RX-7 built from 1978 right up until 1980 and the series 2 constructed from 1981 to 1983. (Comment on this)
7:33 pm	Mazda - The Hope of the Rotary Engine rotary 13b engine Hailed by many as the most gorgeous car actually to occur out of Japan, The Mazda RX-seven took seventeen decades of advancement before it eventually appeared on the streets in 1978. With no the perseverance of a team of Japanese motor engineers and designers under the leadership of Kenichi Yamamoto, in the development of the Wankel or rotary motor, this stunningly intended, large performance sports vehicle, would in no way have happened. In 1961 the Japanese Company Toyo Kogyo, afterwards to be renamed Mazda, accredited from the patent owners NSU-Opel of Germany, the complete rights to develop a new rotary motor. The Rotary motor was named soon after its inventor Wankel and had no aide or crankshaft as these, but consisted of a straightforward fuel injected rotor blade that span close to a central generate-shaft that was connected to a rear wheel differential for generate. In principle the rotary motor is far superior, by means of its simplicity in layout, than a traditional piston combustion motor, with a lot less heading elements to go wrong and immediate generate electricity output. Yamamoto's team at Mazda set to operate on establishing a rotary motor that would get over the problems of loss of compression, exhaust, and the overheating of the rotor blades ideas, that had limited Opels good results at developing the technologies in the 1950's. Soon after success with before RX types the RX-two, RX-three and RX-five and in spite of financial problems at the business, Mazda lastly arrived up with the more substantial 12A motor which was fitted to the new Mark 1 RX-7 constructed from 1978 right up until 1980 and the sequence 2 constructed from 1981 to 1983. The Mazda Rx-7 was a two seater plus two hardtop jeu coupe, curvaceous and aerodynamic and it right away caught the creativeness of the motoring world which globally hailed it as an instant design basic. The design of the auto was developed fully about the motor and exhaust configuration. A bi-rotor motor placing out what was seen as equivalent of just 550 bhp for each rotor the 12A in the RX-7 was able of speeds of above 130 mph and with high lower-finish torque reached from to sixty mph in just 6.3 seconds. Officially its bhp was just 100 horse electricity but provided how light the vehicle was, it was typically described as like driving a skateboard, the power to fat ratio gave it an output equivalent to 230 bhp. Exhilarating to generate due to the fact of the smoothness inherent in the movement of the Wankel rotary engine, little vibration or shaking was felt at large engine speeds. An alarm was fitted to the rev counter to warn the driver when the 7000 rpm redline was approaching. If you exceeded it or did not heed the alarm the motor would cut out to shield the ceramic rotor ideas from overheating. The vehicle was high-priced to operate, the engine consuming close to twenty miles to the gallon but at 50 % the price tag of a Porsche and with all the trimming these as electric windows and sun-roofs, the RX-seven was sought by young and previous alike. (Comment on this)