Can I use the fact that I was blond as a kid as an excuse for asking stupid questions? Crankcase scavenging – the tradisional inlet into crankcase and then into the cyllinders via the transfer ports External scavenging – used in conjunction with a turbo- or supercharger where the pressurized inlets are directly into the cylinders It has built in calculators for basic head shapes, crankcase compression ratio and target BMEP. Need some sleep, but Ill try to produce something describing my modelling tomorrow. The black line shows the mean temperature inside the cylinder TCyl , the red line the temperature of the unburnt mixture TUnBurnt , and the green line shows the burnt mixture temperature TBurnt. I see you modify air-cooled engines too. So, as promised, this is how I approached the “best bell”.


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Such a good idea this thread and so little follow up This shows the mass flow in the transfer port window and the exhaust port window. This puts negative on the outside of the enmgod2t and positive on the inlet side, opening the reeds very quickly and early.


Can I use the fact that I was blond as a kid as an excuse for asking stupid questions? Thing I thought about was, there is only one sort of slide carb but was led to believe a flatslide performs differently from a round slide, that’s not an issue? This gives the lie to the fact that using intake rubber and carb lengths off a are correct for a to cc cylinder as is done by most manufactures and is accepted by tuners as OK.


Index of /~sph0800108/modenas_dinamik_forum/EngMod2T

It can be either a centrifugal compressor or twin rotor type compressor eg Roots. Software is included to digitize the compressor characteristics.


Single Pipe per cylinder Branch manifold Log manifold Each class can be further divided into the following types: Bookmarks Bookmarks Digg del. Join Date 2nd July – Page 1 of 3 1 2 3 Last Jump to page: Blair pipe – the pipe is based on the guidelines as presented by the late Prof GP Blair.

Index of /~sph/modenas_dinamik_forum/EngMod2T

The in cylinder temperatures are shown. I also have a question. Note how the blowdown pulse PepRight differs from the reflected engmod2r PepLeft during the window open period.

It shows the transfer port, cylinder limited to 4bar and exhaust port pressures for an Aprilia RSW engine with port event lines:. Engine Layouts The current version of the software can simulate engines ranging from 1 to 8 cylinders with the following layouts: Software is included to digitize the compressor and turbine characteristics.


The purity of the cylinder is an indication of how good the scavenging was and what the purity of the plugging pulse was. This shows the left and right moving waves at the exhaust window, which explains why they are the same when the window is closed.

Open pipe – the main or collector pipe can be configured as an open pipe Box pipe – the main or collector pipe has a box or plenum in it. The powervalve can be of the governor type mechanical or servo motor or of the pneumatic type.


In reality my “rubber boot” is bigger in diameter at the reed face, but using the effective diameter less the divider sets the actual area as seen by the flow. Join Date 11th July – The photo below shows what im talking about Exhaust Ports The exhaust ports fall into three main classes: Here is the single most important trick to be learnt about intake tuning.

So ithought I’d see what the flow at the inlet does and this baffles me even more, Ab7 seems to flow far less then Ab6 but still makes more power and reed disp and crank P ain’t that different?

The top left lists the 8 types of trace files that can be selected: According to my first picture posted in this thread, end correction 4mm. Look at the RZ inlet for my F3 bike. I must be missing something The trick is to use the correction length that gives you the effective curtain area equal to that start dia area. Shorten the intake and the yellow crossing point moves to the right,giving the coincident crossing point at higher rpm.

Apart from a bunch of simulations I have built and ran such an intake, but without a dyno it’s all but impossible to evaluate the small improvements suggested by simulation.