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Well now my motor is blown and I have no explanation. I call my tuner and explain the situation to him. He quickly tells me with my numbers I put down its very clear that the load on the dyno wasnt set correctly. I ask him to explain and he tells me between every car that gets dynos a "load" must be set according to each car. Apparently little or no load was but on the car so basically it was free rolling as i dynoed. The car was tapping out at about 8200 RPM electronically, but as I'm told by many tuners when no load is set that the car continues to rev mechanically to 10,000+RPM's.
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Hang on here a sec.... THERE IS NO WAY A DYNO CAN BLOW YOUR MOTOR.
There seems to be a ton of miss information and finger pointing done at shops by people who don't take the time to learn about cars, and rely on tuners, mechanics and dyno shops to do everything for them.
1. When you're on the dyno, the rpm is picked up by an ignition wire that gets connected to your spark plug wire. This along with your tach, provides a VERY accurate rpm of the motor regardless of engine load. Ontop of that, every car has a rev limiter that cuts ignition past the red line. Dont believe me? Put your car in neutral and floor it(lowest load possible)... youll still hit the rev limiter and your rpm will be correct. The only way to rev the motor to 10,000 rpm would be if the car was miss shifted from 4th to 2nd gear under heavy load, and even then it would register on your tach as well as on the dyno's log.
2. Even if the motor did rev to 10,000 rpm, you would be looking at damage in the head/valves, not the bottom end of the motor. Bottom end problems happen for 3 reasons... 1, lack of oil. 2, detonation. 3, mechanical failure from pushing the motor beyond its factory hp.
3. Since he mentioned scion... Im going to take a guess that he had a turbo TC with over 370whp. This is a high compression 2.4L NA motor, that the owner pushed to produce over double the horsepower that the motor was ever engineered to handle... he should be pointing the finger at himself, not a dyno shop.
4. Mustang dyno's are load based dynos. They suck for bragging rights, but are essential for tuning an ems from the ground up for different load points to simulate different driving conditions. Low load would be like driving your car down a hill, and a high load would be similar to flooring it up hill. If the dyno was set to low load, it would cause the least amount of stress on the motor possible.
5. You cant just slap on a turbo kit on your NA motor, and expect it to last forever...even if your turner, dyno shop, mechanic, etc... did everything right, there is still a good chance that the motor will blow.