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Originally Posted by The GrRingo
Questions:
1. Difference in boost levels. (how much power/effect it gives)
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one misconseption is that all psi is created equal. Air density and air pressure are not the same measurement so 7psi on a smaller turbo will forsee less power than a larger turbo becuase of the volumes of air flowing.
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Originally Posted by The GrRingo
2. Pro's and Con's of spooling at lower RPMs and Higher.
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well in relation to a small turbo vs. a large turbo
quicker spool(small turbo)= more fun around town but worse gas milage and worse traction
slower spool(large turbo)= better traction more top end power but may seem gutless until turbo spools
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Originally Posted by The GrRingo
3. Fuel cost (If someone builds a turbo, how much should they be looking at to spend on gas per day? This I would think of as a "biggy" when considering the setup goal.)
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depends on how you drive the car. If you drive in boost all the time gas will be expensive and your motor won't last as long.
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Originally Posted by The GrRingo
4. Different Setups tried and tested and a description of their practical uses. (Like I read somewhere that you could put a smaller turbo in sequence with a large, so that you could spool quick with the small and then get teh power of the larger turbo when the smaller disengages.)
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sequential turbo's are useless for 4 cylinder motors
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Originally Posted by The GrRingo
Um.. and I guess the last question (that's running through my mind) is what it takes to Tune the car. What are you tuning, how does it effect the car, etc. (Another big picture to look at.)
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Your stock ecu is preprogrammed to not read and respond to positive air pressure. So when you turbo you put a pems(programable engine management system) on your car that you can modify things like ignition tables and fuel maps and also adjust for larger injectors and better components. When you tune a car you are adjusting ignition, fuel and timing for the optimal power and longevity of the car. It's easier to comprehend if you understand an internal combustion engine.