I am trying to figure out a good way to make a dual plane out of my aluminium intake. I don't want to buy a second manifold to mess with and don't want to totally muck up my existing one, until I'm sure the results are worth it and have someone to do the welding process.
My original plan was to use a carb spacer with a plate welded onto it that would split the plenum into two sections, just like the exhaust. I took closer examination of the manifold and don't see any way to make the fitment as tight as I would like, also, the 2bbl adapter renders this impossible anyway. BUT I have a buddy that will make a second adapter that I can mess with.
I am wondering how effective it would be to not have TOTAL seal around the devider, It will be pretty tight in there, but I know that with the texture of the floor, impossible to get total seal right off. I know that on a bent 8 it tends to help to have a void in the very top of the carb spacer, I'm assuming this provides some sort of plenum equalization, much like an x-pipe in an exhaust. But what if this void was around the entire divider would it make it essentially useless?
Of course if it would still help to test this way, as just a prototype situation, It would later be implicated into the actual manifold and set permanent.
I like the benefits of the dual plane on a bigger engine, allowing more cam while still helping off-idle torque and not deteriorating top end very much,, or moving it down in the rpm band. Also smoothing out the idle a bit, and helping economy to some extent around town sounds nice.
Thanks for any input.
Gerald.
My original plan was to use a carb spacer with a plate welded onto it that would split the plenum into two sections, just like the exhaust. I took closer examination of the manifold and don't see any way to make the fitment as tight as I would like, also, the 2bbl adapter renders this impossible anyway. BUT I have a buddy that will make a second adapter that I can mess with.
I am wondering how effective it would be to not have TOTAL seal around the devider, It will be pretty tight in there, but I know that with the texture of the floor, impossible to get total seal right off. I know that on a bent 8 it tends to help to have a void in the very top of the carb spacer, I'm assuming this provides some sort of plenum equalization, much like an x-pipe in an exhaust. But what if this void was around the entire divider would it make it essentially useless?
Of course if it would still help to test this way, as just a prototype situation, It would later be implicated into the actual manifold and set permanent.
I like the benefits of the dual plane on a bigger engine, allowing more cam while still helping off-idle torque and not deteriorating top end very much,, or moving it down in the rpm band. Also smoothing out the idle a bit, and helping economy to some extent around town sounds nice.
Thanks for any input.
Gerald.
