Because I designed and made my own heads with some own philosophy I wanted to do some tests. I did a test once making a vid on an idling engine but it did raise some questions. The nest test I wanted to do is using a steady heat source and a steady airflow to test on most equal conditions.
The idea is to make some slide in module to fill up a crankcase wit in the center a heater and next to it a temperature sensor to measure the heat on combustion room level and the airflow is done by a fast PC fan.
A 1st test of how hot the "engine" can become w/o any cooling, The heater is 12v rated running on 13.5v. 132 degrees Celsius is not bad.
My heatcam can not set a minimum and maximum temperature range and so the color palette adjusts itself to the automatic minimum and maximum temperature it detects. Taking pictures of cooling heads with different temps can be confusing if temperatures are different and so it color palette The minimum is just the room temp and is about 20 degrees. To fool the meter I did get a small so called PTC heater with a temperature of 110 degrees. Because IR devices have an issue with getting the right temperature on plain aluminium I did stick a small black cooling fin on it. As you can see the red cursor it detecting the hottest part and the white cursor which you can point your self is on the plain surface giving an almost 20 degrees difference. This is only a difference made by the meter, in real both parts have the same temperature. In the test there is also a plain aluminium OSMAX R2105 head used to see if it makes a difference compared with an anodized one. But the sensor inside the engine is always reading the right temperature.
The test is done in 2 steps, with the whole engine in a full airflow and with a simple body simulation where only the head is placed in the airflow. With all engines the "body" was set on the same height of 8cm.
This is all the equipment to test with, sadly the Rody R2101 head did not fit, it needed a slight smaller diameter buttonhead. Instead I used the silver looking OSMAX R2105 head. Again, keep in mind that the IR readings on this head are a bit off.....
The heads are:
- Novarossi Brave, which I see as the most standard design full size head.
- Novarossi Ielasi 9CL, which is the tapered or also called as an xmas tree shaped head.
- OSMAX R21 head, this one is from the stock 5 port onroad engine.
- OSMAX R2105, it is a less fin lighter version of the R21
- My own Tooms Tuned head
- On its way but not in yet is the Hasi Tuned head with straight up fins, I will test that one later.
The 4 colored anodized heads within a same color scheme range with a full engine cooling w/o a body simulation.
Funny to see is that again my head is full colored and the others are on top a little bit cooler as my movie did show..
Oh, the test is actually very simple, just power it all up and wait until the temperature is stabilized.