Blackwing Vs RamAir one more time
Thread Starter
Pro
Joined: Apr 2002
Posts: 658
Likes: 4
From: North York Ontario
Blackwing Vs RamAir one more time
I have measured the air pressure at various speeds at the front bumper of the C5.
I have measured the air temperature at various locations under the hood of the C5.
I have measured the MAF from Ram Air at various speeds.
Results:
I was able to create 6 inches (0.25psi) of water at 100mph at the filter when ducting air from the License plate opening directly to the blackwing.
At 60MPH I saw no benefit with RAM AIR over the natural Blackwing.
At 100MPH the Air pressure indicates 4 or 5 HP over the natural Blackwing.
I found little meaningful increase in MAF vs RPM at 60mph and over. My track times did not show any substantial increase, perhaps 1mph (119mph).
Once the C5 is moving at say 20MPH there is no advantage to having heat extractor hoods or baffles to isolate the air box. The under the hood temperature is ambient. However at park or slow idle you may have a benefit.
The best place to ram air is through the license plate, which is dead center or at the maximum acceleration of the air mass. The fog light vents are a less effective alternative and may draw air at speeds over 100MPH.
But then again I could be wrong, and I’m sure many will think so.
I have measured the air temperature at various locations under the hood of the C5.
I have measured the MAF from Ram Air at various speeds.
Results:
I was able to create 6 inches (0.25psi) of water at 100mph at the filter when ducting air from the License plate opening directly to the blackwing.
At 60MPH I saw no benefit with RAM AIR over the natural Blackwing.
At 100MPH the Air pressure indicates 4 or 5 HP over the natural Blackwing.
I found little meaningful increase in MAF vs RPM at 60mph and over. My track times did not show any substantial increase, perhaps 1mph (119mph).
Once the C5 is moving at say 20MPH there is no advantage to having heat extractor hoods or baffles to isolate the air box. The under the hood temperature is ambient. However at park or slow idle you may have a benefit.
The best place to ram air is through the license plate, which is dead center or at the maximum acceleration of the air mass. The fog light vents are a less effective alternative and may draw air at speeds over 100MPH.
But then again I could be wrong, and I’m sure many will think so.
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
It looks like you have an imitation of the Halltech Tunnelram, which is installed in conjunction with a TRAP intake. I've always said that this path of cold air is certainly the most direct. The problem for many C5 owners is that it detracts from the smooth appearance of the front facia.
Thanks for the data!
Thanks for the data!
Thread Starter
Pro
Joined: Apr 2002
Posts: 658
Likes: 4
From: North York Ontario
Originally Posted by Dave68
It looks like you have an imitation of the Halltech Tunnelram, which is installed in conjunction with a TRAP intake. I've always said that this path of cold air is certainly the most direct. The problem for many C5 owners is that it detracts from the smooth appearance of the front facia.
Thanks for the data!
Thanks for the data!
I see no significant Ram Air effect possible with the HallTech. Using the word Trap is a misnomer as there is no TRAP that could build pressure and hence improve the Mass Air Flow at speed, which is contrary to my installation.
I did not use the word COLD. Remember the air temperature under the hood at speed is already ambient.
Racer
Joined: Jul 2004
Posts: 451
Likes: 0
Originally Posted by auctiondepot
I have measured the air pressure at various speeds at the front bumper of the C5.
I have measured the air temperature at various locations under the hood of the C5.
I have measured the MAF from Ram Air at various speeds.
Results:
I was able to create 6 inches (0.25psi) of water at 100mph at the filter when ducting air from the License plate opening directly to the blackwing.
At 60MPH I saw no benefit with RAM AIR over the natural Blackwing.
At 100MPH the Air pressure indicates 4 or 5 HP over the natural Blackwing.
I found little meaningful increase in MAF vs RPM at 60mph and over. My track times did not show any substantial increase, perhaps 1mph (119mph).
Once the C5 is moving at say 20MPH there is no advantage to having heat extractor hoods or baffles to isolate the air box. The under the hood temperature is ambient. However at park or slow idle you may have a benefit.
The best place to ram air is through the license plate, which is dead center or at the maximum acceleration of the air mass. The fog light vents are a less effective alternative and may draw air at speeds over 100MPH.
But then again I could be wrong, and I’m sure many will think so.
I have measured the air temperature at various locations under the hood of the C5.
I have measured the MAF from Ram Air at various speeds.
Results:
I was able to create 6 inches (0.25psi) of water at 100mph at the filter when ducting air from the License plate opening directly to the blackwing.
At 60MPH I saw no benefit with RAM AIR over the natural Blackwing.
At 100MPH the Air pressure indicates 4 or 5 HP over the natural Blackwing.
I found little meaningful increase in MAF vs RPM at 60mph and over. My track times did not show any substantial increase, perhaps 1mph (119mph).
Once the C5 is moving at say 20MPH there is no advantage to having heat extractor hoods or baffles to isolate the air box. The under the hood temperature is ambient. However at park or slow idle you may have a benefit.
The best place to ram air is through the license plate, which is dead center or at the maximum acceleration of the air mass. The fog light vents are a less effective alternative and may draw air at speeds over 100MPH.
But then again I could be wrong, and I’m sure many will think so.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
I was able to create 6 inches (0.25psi) of water at 100mph at the filter when ducting air from the License plate opening directly to the blackwing.
I wonder how much usuable benefit 0.25psi gives ?
