Victor, Super Victor...or just stick with my LD 340 maniflold

Cudafever said
I get what your saying 100%
but now let me throw a couple more thoughts your way.
reversion......."at low rpm" it will do a better job of canceling it right........over a single plan.

The 2n't one is the one that is really on my mind.
You know all the problem i have had with to big of a carb and stumble(for the most part is fixed.) OK here is the question.

I feel like if the minimal cross section of the intake track, is the intake manifold, and the problems i have been having is to weak of a signal to the carb as the throttle is slammed open....................would not the signal to the car be quicker with out the restriction????? or is it the opposite and a smaller manifold would send the signal to the carb faster...........

thats my 2nt questioning as to if a single would be a better or worse move.................

Using the intake manifold to control reversion is a power killer.

You start controlling reversion with the valve job and port work.

You reduce reversion buy using the correct cam timing, and not using a lobe from the 1970’s. A quicker lobe will almost always make more power, but it comes with a price. Due diligence on break in, oil use, idle speed and idle time all become more important as the lobe gets quicker.

If you really think you are having reversion issues, there are spacers that can help with it, but none of the probably 20 I have tested look like what most people use.

If the anti-reversion spacer you are looking at will bolt to the manifold without modifications to the manifold, it won’t do anything for reversion.

It may make more power because the plenum needed more volume, but they don’t do anything to reduce reversion. This is similar to a spacer I tested in 2007. I can’t remember the exact manufacture of what the customer brought in, but it looked exactly like this. I forget how much more power it made, but we know it helped with reversion by the A/F numbers and the jet sizes we dropped. https://www.visnerengine.com/thrott...ers/4500-1-extended-7-degree-shear-plate.html

Here is one I may try next spring when I go to the dyno. It depends on how much more work I want to do and how much effort I want to put into testing. None of these are cheap. I’m not sure the damBest spacer is bolt on because I’ve never had one in my hands.
Carb Spacer, 4500 2.125" Sportsman Combo, dAMBEST Carburetor