View Single Post
Old 8th May 2008, 12:42   #781 (permalink)
Shan2nu
Distinguished - BHPian
 
Shan2nu's Avatar
 
Join Date: Feb 2004
Location: Hubli/Blore - Karnataka - India
Posts: 4,185
Default

Quote:
I too find it weird that the secondary profile is lower than that of the primary. The only assumption I could make is maybe he wants a stronger primary profile to overcome the turbo lag in the initial revvs. And then let the turbo carry on from there once it starts spooling and producing sufficient boost.
The primary and 2ndry profiles work together at the same point, till vtec kicks in. There is no crossover between pri and 2ndry. So the individual lobe profiles are not as significant as the combined lift that the 2 lobes put in.

Here's a vid of the B16 engine - YouTube - ???VTEC?????B16A)

Shan2nu
__________________
VTEC flyby - youtube.com/watch?v=1AhWJlVRPqE
Shan2nu is offline   Reply With Quote