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The Terminator
Engine/Tuning
Got bored today-2.9 Whipple inlet mod
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<blockquote data-quote="RPM4DAZ" data-source="post: 13527996" data-attributes="member: 54154"><p>Yes, exactly as used in some radiator ducting. We have used the turning vanes in a small box style duct in front of racing cart radiators and actually dropped working temps to a more manageable temps... I have done the same in a pressurized area in front of radiators and had an engine oil cooler 90' to flow. The pressure and vane actually promoted flow to the cooler and dropping oil temps in a restricted area without placing it in front of the radiator... Cool stuff to play with, I love engineering solutions to certain problems. Now, I haven't worked on a Whipple unit yet. But, if I remember correctly the air inlet ducting runs over the cam cover and right next to the shock tower right? It even has a slight bend to it? If you were to swing the throttlebody out and away to help air flow through the supercharger adapter, you would have to add an additional bend or kink in the air inlet. Yes, I know it can be done. But, the air flow will become even more biased to one side before even entering the adapter after the throttlebody. I think ( my opinion ) that the great fab and engineering you did to the adapter would be wasted due to too much bias/therefore restriction to airflow before it. Kind of like a great set of heads on a 2bbl carbed V8... Where to place the vane/s...hmmm Obviously I do not have the part in front of me,but, I think I would start the leading edges around 1" - 1 1/2" after throttlebody blade for clearance and to reduce buffeting some. Knife edge the leading edge too. Then I would make them with a slightly decreasing radius towards the inside radius some. Not a lot though. The trailing edge will cause some buffeting once the air flows off the vane. It will help keep the air flowing in the general direction towards the decreasing radius. This will cause a lower pressure in the rear "tunnel" promoting flow at high velocities and promote flow to the inside radius side of the blower entrance too. Am I making any sense here? Another idea, would be to shape the trailing edge into a tight/long convex radius. It would allow a more gradual release of the air over the trailing edge as opposed the a straight perpendicular cut. Kind of like a fire cone in a header collector, just not to a point. Make sure to keep the edge of the trailing end crisp and clean. The air flow will separate from the vane better where any radius and the airflow wants to follow it. Kind of like pouring water out of large smooth rounded pitcher as opposed to say a sharp edged can or tin cup... Good luck to ya. I would sure like to see the next one!!! Another edit: I think I would use two vanes, maybe make the spacing progressively larger towards the inside. Easiest way would be to split the width of the floor into three even amounts. Decrease the outer width distance by about 10%-15% and increase the inner width the same amount. Unless you increase the height of the inside area to a trapezoid cross section. The shape will increase the areas for you.</p></blockquote><p></p>
[QUOTE="RPM4DAZ, post: 13527996, member: 54154"] Yes, exactly as used in some radiator ducting. We have used the turning vanes in a small box style duct in front of racing cart radiators and actually dropped working temps to a more manageable temps... I have done the same in a pressurized area in front of radiators and had an engine oil cooler 90' to flow. The pressure and vane actually promoted flow to the cooler and dropping oil temps in a restricted area without placing it in front of the radiator... Cool stuff to play with, I love engineering solutions to certain problems. Now, I haven't worked on a Whipple unit yet. But, if I remember correctly the air inlet ducting runs over the cam cover and right next to the shock tower right? It even has a slight bend to it? If you were to swing the throttlebody out and away to help air flow through the supercharger adapter, you would have to add an additional bend or kink in the air inlet. Yes, I know it can be done. But, the air flow will become even more biased to one side before even entering the adapter after the throttlebody. I think ( my opinion ) that the great fab and engineering you did to the adapter would be wasted due to too much bias/therefore restriction to airflow before it. Kind of like a great set of heads on a 2bbl carbed V8... Where to place the vane/s...hmmm Obviously I do not have the part in front of me,but, I think I would start the leading edges around 1" - 1 1/2" after throttlebody blade for clearance and to reduce buffeting some. Knife edge the leading edge too. Then I would make them with a slightly decreasing radius towards the inside radius some. Not a lot though. The trailing edge will cause some buffeting once the air flows off the vane. It will help keep the air flowing in the general direction towards the decreasing radius. This will cause a lower pressure in the rear "tunnel" promoting flow at high velocities and promote flow to the inside radius side of the blower entrance too. Am I making any sense here? Another idea, would be to shape the trailing edge into a tight/long convex radius. It would allow a more gradual release of the air over the trailing edge as opposed the a straight perpendicular cut. Kind of like a fire cone in a header collector, just not to a point. Make sure to keep the edge of the trailing end crisp and clean. The air flow will separate from the vane better where any radius and the airflow wants to follow it. Kind of like pouring water out of large smooth rounded pitcher as opposed to say a sharp edged can or tin cup... Good luck to ya. I would sure like to see the next one!!! Another edit: I think I would use two vanes, maybe make the spacing progressively larger towards the inside. Easiest way would be to split the width of the floor into three even amounts. Decrease the outer width distance by about 10%-15% and increase the inner width the same amount. Unless you increase the height of the inside area to a trapezoid cross section. The shape will increase the areas for you. [/QUOTE]
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Got bored today-2.9 Whipple inlet mod
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