[revetec]

Originally Posted by hightower99

The other two engines are the R26B Le-Mans winning 4 rotor rotary engine (not FI, it is NA). As well as the venerable Jeep 6-230 Tornado engine (also NA).

Here is the wiki for the tornado: Jeep Tornado engine - Wikipedia, the free encyclopedia

It is not turbocharged it is Naturally Aspirated. Also I posted those pics as just a sample to show that most of the stuff I have is about WOT BSFC not part throttle.

The problem hightower99 there is great discrepancies of the graphs you posted and the information you have linked to. Just as an example: The graph you say is the Jeep engine and in the graph it shows the engine producing 155hp@4,000rpm and the the article you posted to back it up from Wikipedia shows the engine producing 140hp@4,000rpm and 133hp@4,000rpm. I should also point out that to quantify any of this data, you need to find the graph in a certified report which also shows things like air intake temperature, atmospheric pressure and coolant temperature as it was under that test.

Let me give you an example of how even a car manufacturer can fiddle the figures: I know someone who has worked in the development testing area for a very major European car company that until recently used to lean all mixtures off, ran the engine hotter than the engine was designed to run at, put dry ice around the intake and performed an economy test and logged the BSFC figure. They then richened the mixtures up and performed outright performance tests. Then all the data was put together as if the engine was tested without any modifications and did not disclose the modifications and/or true test conditions.

For this reason I only trust information and reports put out by independent testing from a reputable source and in a full report stating test conditions.

I should also point out to everyone at this point that any dyno can be corrected to read a higher reading whether it is a engine or chassis dyno. For this reason only a certified facility can be trusted for data and results. I'll give an example and a question to all: Is there anyone on here who uses a chassis dyno? Before you perform any tests, do you find out from a reliable source what the drive train losses are for that drivetrain/vehicle and put in the correction values before calculating flywheel power? I have talked to many dyno owners and they only estimate a figure like 20% for rear wheel drive and 15% for front wheel drive cars. So can anyone who has tested their vehicle on a chassis dyno actually quote an accurate figure of what the engine power is? I have visited some chassis dyno facilities that have had the drive line correction as high as 30%. Great for the customer's ego but does little to give an actual figure.

And as for comparing our engine to a Racing R26B Le-Mans 4 rotor rotary engine that is not available to the consumer, what was the point of that?