#1 [url]
Jun 20 07 6:54 PM
| QUOTE (Turtle @ June 15, 2007 10:28 pm) |
| I always heard those blow off valves wher used on higher end turbo's to make the rpm's drop quicker when you let off the gas. Like a strong after market turbo without one will hold the boost pressure for a little while after you let off the gas wich keeps the rpm's from dropping down right away, wich makes it take a lil longer before you can shift to the next gear. Thats what I always thought anyway. I should probable research this a lil more. |
The actual reason for venting the boost when the throttle is closed is to prevent compressor flow reversion, as mentioned earlier. The RPM drop is a byproduct.
Ren