High numbers like that usually indicate a strong engine, but excessively high compression could lead to pre-ignition. Moderation is key!
Seeing 400+ psi isn’t common for 7.3 Powerstrokes—most tend to settle between mid-300s to low-400s. High compression could indicate heavy modifications or even cause stress on the engine. Balance it out!
For those who are starting, remember that a proper testing procedure matters! Ensure your batteries are charged, and the engine should be at operating temperature to avoid skewed readings.
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Absolutely true, xdavis! I’d also add to check your fuel system. Sometimes poor fuel delivery can lead to performance issues that mimic low compression. It’s all connected!
Makes sense! Can we also talk about what tools we need for this? Like, does a $10 gauge work, or should I invest in something better?
Investing in a good quality compression gauge is essential. Cheap ones might not give accurate readings, and you could miss vital signs of engine issues!
I thought those gauges were all the same! So many mechanics claim it’s just about pressure, but good to know accuracy matters too. Thanks for the heads-up!
Kinda like my cooking when I use a pinch instead of a cup—totally different results! Anyone else have funny testing stories?
Haha, that’s true! My first compression test, I thought the gauge was broken because I got wildly inconsistent numbers. Turns out I forgot to give it a few cranks! Always check your steps.