yoshimitsuspeed wrote:riddleyo wrote: No turbo means more longevity, more reliability
With a proper build this just isn't true.
There are plenty of OEM turbo cars that make it to 150k to 200k miles. The biggest thing is how you drive it.
If you built a 150 WHP NA 4A and a 150 WHP turbo 4A it's very likely the latter will last longer. The turbo allows the motor to make more power lower in the RPM. RPM has a lot to do with how long a motor will last.
In the same way, if you built a 250 HP turbo 4A and for the most part drove it nice it would likely last just as long as the 150 HP motor if you drove it nice.
If you stuck them in a top gear style shootout where the 150 HP NA had to drive as fast as it could as long as it could and the 250 HP turbo just had to keep up the turbo would last longer, get better gas mileage and be much less taxed.
So it's all pretty relative. The only issue with having 250 HP is it's hard to drive it the same as if you had 150 HP.
Yep, it is how you drive it. When you have a turbo on your car, you tend to use that power to put a smile on your face, which generally means less longevity. Having fun with boost puts more stress on parts than NA. Simple fact that adding more parts (turbochargers) gives more chances of a part to fail.
But all this is beside the point... the car is not a DD. Meaning smile factor is most important, not longevity.