Predator 212 Compression Release (2024)

FAQs

How much compression should a predator 212 have? ›

Just double checking 10.5:1 compression recipe for Predator 212.

It is a spring loaded valve that opens on the compression stroke and closes on the intake stroke forcing the cylinder to draw a large vacuum slowing the piston's downward movement dramatically (especially effective on a 2 stroke engine).

User reviews note it could reach 11.8 hp, so it seems you'll get some kick out of it. However, most people will gravitate toward the 6.5 hp options as those have more uses, can be replacements for many machines, and are far cheaper.

The generally accepted gauge for adding compression is that one full point of compression can add between 3 to 4 percent power. So, if an engine is making 50 horsepower and we add a full point of compression (from 11 to 12:1 for example), this could potentially push the power to 51.5 horsepower.

But a good rule of thumb says that each cylinder in a mechanically sound engine should have compression of 130 psi or higher.

A compression release mechanism works to ease the starting of internal combustion engines by allowing them to rotate to starting speed without having to work against the compression of the pistons.

Now, When calculating the release time of your compressor, there is one number that always stays the same, and that number is 60,000. The reason this number is always used, is because there are 60,000 ms, in one minute. What we're going to do, is take the bpm of the song, and divide 60,000 by that bpm.

How much compression should a 250 2-stroke have? If you mean for a compression test; A 50cc - 200cc should be 120-190 PSI. A 250cc should be 170-240 PSI.

At Stage 1, the kit comes with a variety of performance parts, including air filters, choke brackets, jets, valve springs, gaskets, and more. Stage 2 includes everything in the Stage 1 kit with the addition of a bored carb for up to 12 HP.

The predator engine has a governor that limits its' rpm to that 3800rpm target. It can be adjusted so the target pm is anywhere between about 2800, and 4000 rpm.

What horsepower is a Predator 212? ›

If you are looking for one of the best go-kart and mini-bike racing engines in the market, the Predator 212 will surely fit your needs. The Predator 212 engine is arguably the most popular in its class primarily because of its great cost-to-performance ratio.

Most gas engine's compression should be between 125 and 175 PSI while a diesel will generally fall between 275 and 400 PSI. Remember to write down each of your findings. If one or more cylinders looks to be way off in PSI, you can re-run the test again just to check.

No cylinder should have a pressure lower than 75% of the highest recorded value. In this example the highest pressure is 168 psi, so the minimum allowable value will be 0.75 * 168 = 126 psi. In this scenario cylinder # 5 is considered to have low compression, while #2 is just passing.

If in doubt about your readings, talk with your dealer to see if they're in the ballpark. Generally, readings below 90 PSI for modern two-stroke outboards indicate a problem; most will produce cranking compression readings in the 90 to 105 PSI range, depending on the engine year, make, and model.