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Re: Re: Re: Re: 966 turbo
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Posted by matt on January 10, 2004 at 18:45:37 from (12.14.226.17):
In Reply to: Re: Re: Re: 966 turbo posted by RedToyMan on January 10, 2004 at 09:46:08:
Thats what a person whould think. Boost caused by how fast the turbo is spinning compared to engine rpms. Boost is built by the difference in the amount of air leaving and entering the engine. Even though you engine may be reved up high, it really is only producing the power to run the engine at that rpm ( more like 35 hp instead of 135) so it is actually not using that much fuel. As an engine is put under load it burns more fuel causing a increase in the amount oxegen used (this chemical reaction causes a increase in total air)this increases the amount of gas leaving the engine, this combined with the fact that as an engine produces more power it actually becomes much less effiecent. With the increase in power to the ground the engine produces much more energy in the form of heat, most of this heat leaves through the exast gas causing it to expand and creating the total amount of "air" that goes throught the exast side of the turbo. These factors cause a greater diffence in the amount of air leaving the engine compared to the amount that is entering( the turbo spins faster compared to engine rpm) To put it simple more gas leaves under load causing more boost sure your engine should build a little boost at full rpm but it will actually produce more under load at low rpm and the most( 16psi)under load at full rpm. And a waste gated turbo will build more boost without load, all the waste gate does it keeps it from building too much boost under full load.Hope this helps.
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