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174 Posts
I know with my NA race engines I am gaining about 1 psi positive airbox pressure at 175mph.
I have also picked up a CONSIDERABLE amount of HP by using ram air into the turbo compressor as apposed to drawing vacuum for inlet air. <I have done a fair amount of testing on this. Ram air has NEVER yielded negative results.
-A: I have ALWAYS thought the air inlet into the fender from the SC airbox was too small. It is as big as toyota could of used without having the dealer/installer cut metal out of the fender. That doesnt mean it couldnt benefit from being larger. I have NOT done any data logging to determine pressure variances in different stages of the intake tract so its completely speculation.
-B: a 'properly' (not just sticking a tube forward and hope it works) designed ram air SHOULD decrease the rotor load and increase hp multiple ways.
ALL THIS BEING SAID!!!!
I am now starting gearing up for the '13 race season so I have limited time to do anything else (and I am being lazy). If anyone that has some smarts is interested please look at the following formula and determine air inlet sizing. This will tell IF toyotas is big enough and what size a ram air will need to be for this engine.
(from my friend and fellow land speed racer Dr. Mayfield....quite possibly the 2nd smartest MFer I know)
The Mayfield Company Homepage - Automotive Analyses
If a determination is made on correct inlet area is made I will design and build a ram air system and post the results.
~JH
I have also picked up a CONSIDERABLE amount of HP by using ram air into the turbo compressor as apposed to drawing vacuum for inlet air. <I have done a fair amount of testing on this. Ram air has NEVER yielded negative results.
-A: I have ALWAYS thought the air inlet into the fender from the SC airbox was too small. It is as big as toyota could of used without having the dealer/installer cut metal out of the fender. That doesnt mean it couldnt benefit from being larger. I have NOT done any data logging to determine pressure variances in different stages of the intake tract so its completely speculation.
-B: a 'properly' (not just sticking a tube forward and hope it works) designed ram air SHOULD decrease the rotor load and increase hp multiple ways.
ALL THIS BEING SAID!!!!
I am now starting gearing up for the '13 race season so I have limited time to do anything else (and I am being lazy). If anyone that has some smarts is interested please look at the following formula and determine air inlet sizing. This will tell IF toyotas is big enough and what size a ram air will need to be for this engine.
(from my friend and fellow land speed racer Dr. Mayfield....quite possibly the 2nd smartest MFer I know)
The Mayfield Company Homepage - Automotive Analyses
If a determination is made on correct inlet area is made I will design and build a ram air system and post the results.
~JH