<VV> Cross over intake pipe

[Jim Davis]

Without a crossover, you will get an exhaust drone at 2,700 to 2,900 
rpm.  That is why the stock 140 used double chamber 1.5" dia  mufflers.  
If you want it to sound like a split manifold Chevy I-6 with glass packs 
then leave the crossover out.    Of course you could always drive faster 
the 60 mph and you will never notice the drone.
Jim Davis.


On 4/8/2015 6:07 PM, Jeff Bahret via VirtualVairs wrote:
> How necessary and purposeful is the cross over pipe between the left and
>   right banks? I have a much modified 140, with a hot cam, 10.5 CR, center
> mounted 390 CFM Holly, and headers. I have it apart again, and now is the
> time to re-install it. If it's just there to enhance idle , it is useless
> due to the race cam. I'll like some thought from the group. thanks,Jeff