One last note of caution for anyone using the new BBM tunnel wedge is the oil drain back at the front of the intake manifold is not cast for clearance, and the water passage is paper thin where you would normally clearance it for the oil to drain back.  If you are not careful you will break through into the water.  One side is thicker than the other.  Just a caution, since many folks are having trouble with oil pooling in the valve covers, and slow drain back.  The BBM at the front will only have the gasket thickness as a drain hole on one side.  Joe-JDC

I think what I am trying to ask is,  how do you think the factory Tunnel Wedge, the ("regular") Dove Tunnel Wedge, the Dove "High Riser" Tunnel Wedge, and the BBM Tunnel Wedge fit in the Tunnel Wedge hierarchy?

Thanks,

paulie

Paulie, I think the factory Tunnel Wedge can be ported to 500 cfm, but not necessary in any current builds.  The BBM will probably be capable of quite a bit more, especially if used on a CJ type head opening, and the Dove TW is also capable of 500+ cfm.  The Dove HR TW is humongous.  When matched up to a BT HR head opening, it hits 585 cfm with ease.   I have ported the Dart Pro Stock intakes, Olds Pro Stock heads, and some of those heads flow 490-540 cfm with a 2.450 intake valve, and can use the Dart intake at 585-600 cfm.  They make in excess of 1200 hp with those heads and those flow numbers on 632-738 cubic inch BBCs.  We don't have a FE head that even comes close to 490 cfm or 540 cfm, so why do we need an intake that is designed for that flow?.  Just my opinion.    On your intake, just to match the ports up, the Dove flow goes up really fast, proving it is too big in volumn for the best performance.  Yes, it works, but it could work a lot better with less intake runner volumn.  Joe-JDC

Yes, it has a cover, and is machined for an "O" ring seal like Jay's adapter.  The cover is a simple 3/16" aluminum plate with no engraving. The seal is not continuous, but a rope seal.  I haven't installed mine yet, since I may be doing some additional port work like a very simple gasket match to see how much that affects the flow, and I may bolt it up to my Survival heads that flow 350+cfm to see how it affects them.  Lots of projects in the works, just so many hours in my energy level at my age.  LOL.  Will be interesting to do a back to back with both tunnel wedges on a big cubic inch and decent compression and camshaft.  Headers may become the bottleneck for shocktower cars.   Joe-JDC

I received my new BBM Tunnel Wedge intake today, and it looks very clean and well made.  I was surprised at the size of the intake ports because I was under the impression the ports were going to be high velocity and smaller than stock.  They are quite a bit larger than the original C8AX-A Ford Motorsports intake, and I wanted to see how it compared with the original in flow numbers.  Standard procedure to tape the seven ports not being flowed, block off the power brakes fitting, and use two open spacers with tapers to reduce turbulence when flowing.  Here are the flow figures from a Ford intake as cast, and the new BBM as cast.

Ford C8AX-A tunnel wedge

1.     374.35
2.     385.94
3.     372.57
4.     365.44
5.     370.79
6.     369.01
7.     380.59
8.     380.59 for an average of 374.91 cfm.

BBM tunnel wedge as cast:

1.     478.56
2.     484.54
3.     479.76
4.     472.58
5.     466.60
6.     479.76
7.     483.35
8.     496.57 for an average of 480.215 cfm

Flowed on SF-600 in air conditioned room at 70*, 38% humidity.  10-19-2016  Joe-JDC

GT-40 P intake flow 184-189 cfm stock.  C6AE-r/R 220-232 cfm stock 2.020-2.030 intake valve.  Joe-JDC

Joe,
I know the intakes are different, but my BT MR 2x4 intake is four hole for each carb.
What have been your experiences on using a 4 hole vs an open spacer on this intake?  same result?

Thanks,
Drew

That BT MR 2x4 intake works better/flows better with a four hole with the center blended under the open tract between the two sides.  The blending is simply used to keep turbulence at a minimum.  If you don't understand what I am saying, pm me and I will try to send pictures by e-mail of what I mean.  I can take pictures tomorrow.  Joe-JDC

Great time at the EMC for me.  My son came in for a couple of days, and had a blast participating with Royce's team and Ted.  It was cool to meet Doug, who kinda stood at a distance at first just watching everything unfold, but joined in and helped.  Sorry I didn't get more time to talk with you.  Royce is a trooper with trying to jockey two entrants of his own for the first time at the event.  They have changed the rules allowing a team to sponsor two engines.  Also, there is a change allowing the winner to come back the following year in the same class with a different engine, but same style. 
Joe-JDC

My 2014 pickup has 430 gear and 6 speed auto which cruises at 72 @ 2000 rpm and gets ~18.5 mpg.  I know apples to oranges, but even towing a mustang on trailer it averages 14.0 mpg.  The deep gears don't seem to bother the fuel economy with the double overdrives.  Joe-JDC