Is this gonna be a problem?

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Captainkirk

Captainkirk

Old School Mopar Warrior
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I'm fairly satisfied I can make a smooth transition from TQ to AirGap RPM using my adapter plate, but just noticed a huge gap between manifold planes when it's in place. Will this upset the air/fuel flow through both sides? I know there are plenty of single plane designs that use an open plenum, and several dual planes that used a cut-down or notched divider, but then again, they are not Air Gaps.
Anyone had any experience in this area? I have a Holley 650 DP, Eddy Performer and Carter AVS as alternates but really wanted to try the TQ. Or, maybe there is an adapter plate with a bridge?

17006660137_84a3e1de01_z.jpg


This shows the huge gap between sides of the throttle plate when butterflies are opened:

17105905680_290950e063_z.jpg
 
Think of it as an already dropped septum!
I have that adapter and used it on an Xcellerator 7545. My 366 didnt like it. I tried that adapter on an LD340. Same story; the motor didnt like it. Thats the ONLY reason Im not running a TQ.
Its so long ago, that I dont recall the issues.I really wish theyd make an AG for a TQ. Id buy one yesterday.
 
Won't hurt a thing. The RPM and velocity will be high enough with the secondaries open that there won't be any disruption of air. It will know right where to go.
 
round that center divider off but don't make it a sharp edge. pull the sides of the intake back as far as you can without going to far, leave at least a 1/4" around the outside of the intake for the gasket. blend everything in smooth, no sharp edges.
 
Captainkirk said:
Promise?
Click to expand...

Yup. I had that quirky spread bore Holley on my Ford truck remember? Had it mounted the same way. Action Plus divided intake and an open spread bore adapter. All it had was problems with the idle circuit. It ran down the road great.
 
Two7T3Dart said:
OK, but that adapter just negated all the good things about a 2 plane intake...the 2 planes are no longer separate.
Click to expand...

That's actually a good point. BUT, the carburetor base plate essentially does the same. It is not divided one side separate from the other, EVEN if you use the matching base plate gasket that has the divider like the intake. Because of the vacuum passages in the baseplate, just like a Holley, the two sides are really tied together, regardless. Obviously not as MUCH as they are now with his adapter, but they are. Look at any Holley, Carter/Edelbrock, TQ base plate. You will see the two sides are not separated vacuum wise at all.
 
RustyRatRod said:
That's actually a good point. BUT, the carburetor base plate essentially does the same. It is not divided one side separate from the other, EVEN if you use the matching base plate gasket that has the divider like the intake. Because of the vacuum passages in the baseplate, just like a Holley, the two sides are really tied together, regardless. Obviously not as MUCH as they are now with his adapter, but they are. Look at any Holley, Carter/Edelbrock, TQ base plate. You will see the two sides are not separated vacuum wise at all.
Click to expand...

You're correct, Rob, but the carb base passages are very small compared to the basically open plenum he's creating with that spacer.
 
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