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I own a 1968 Mustang GT with a 390 and 4 speed. We used it for developing some or our products and the carb sat dry for about 4 years. When I tried to start it after that, there was 0 accelerator pump shot. Rather than rebuilding this 650, I just bought a cheapie 4 …
Continue reading “How can I dyno test the engine in my car?”
Our Port Flow Analyzer for flow bench testing has several features for making several measurements of cylinder head performance. For head flow, pretty much anything that improves CFM flow improves the HP potential of the head. But after measuring CFM, there are several other measurements which can give better insight into one particular head runs well on the dyno …
Continue reading “Besides CFM Flow, what can you measure on a Flow Bench?”
There is nothing magic about 28″ water. Famed engine builder Smokey Yunick picked this pressure (about 1 psi) many years ago (probably in the 1960s) as what he thought was reasonable, and it stuck. It is now the industry standard.
An engine dynamometer is used to measure the engine’s power. Dyno tests can be done different ways, but the most common method in the racing world is a sweep test. A sweep test is where you slowly (or quickly) accelerate (or decelerate) through the RPM range with the engine at full power. This must be …
Continue reading “Correcting for Engine Inertia during Dyno Tests”
Recently a well known racing head porter asked for some graphics (pictures) for an article on head port design. His article dealt with there is more to a head’s performance potential than just CFM flow numbers.
When building or modifying an engine for all-out racing, street/strip performance, trailer towing, or most any application, there are many variables to consider. One critical variable is the Compression Ratio or CR. Compression ratio is the amount of “squeeze” the piston puts on the air fuel ratio before it lights the fire. And, more importantly, it …
Our engine performance simulation program (Engine Analyzer Pro) produces what we call RPM Data like torque, HP, fuel flow, BSFC, etc at each RPM of the run. It also produces Cycle Data which are things like cylinder temperature, cylinder pressure, piston thrust on the wall, intake valve lift, intake valve flow, etc at every 4 …
When you are dyno testing engines, you want to be sure that each time you test the same engine your dyno comes back with the same power curve.
Everyone has had the experience of buying an electronics product which is now obsolete or the company has gone out of business.
If you have an old Dyno with analog gauges I’m sure you know that newer Dynos are much more accurate, repeatable, and easy to operate.