02-19-2010, 05:09 PM
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#11 (permalink)
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Track Member
Join Date: Jul 2009
Location: Louisiana
Posts: 541
Drives: 800whp Unicorn FI Z
Rep Power: 19
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Quote:
Originally Posted by Solus
Kevtex... I have read your posts and for the most part agree with all of them except this one. The power requirement is not the same to get it from a belt as it is from the exhaust. When you take it from the belt you will suffer a larger power requirement due to the parasitic loss etc and you are taking power to make power. Gaining it off of exhaust gasses doesn't cost anything. The engine is shooting out the exhaust gasses whether the turbos are there or not so you are not taking any power from your engine to make the extra power (boost).
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Quote:
Originally Posted by KEVTEX
With a turbo, the engine has to work harder to get the exhaust out because of the increased back pressure the turbo provides. The same amount of extra work is required if you take the power from a crank pulley.
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I see what kevtex is saying. Laws of physics will tell you the same amount of energy is used to create say 6lbs of boost whether it be by pulley or exhaust. I totally agree with that, but the energy used by the exhaust while exactly the same as the energy used by the pulley does create different effects on the engines HP/TQ output. I still say using the exhaust pressure is more efficient for the engine to create boost and not have such and adverse effect on the current HP output, but yes, it does exhaust the same amount of energy on an atomic level as with the pulley.
Last edited by kdoske; 02-19-2010 at 05:19 PM.
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