Skabidat

I am posting this here because carb questions in the 2nd gen forum end with people fighting over things totally unrelated to my questions, i am hoping things will be alittle better here.

Ok, i am still totally in the planning stages of everything, but i am getting more and more sure of what i want to do.
I have a 4 port s5 engine that i want to tear down, do a half bridge port, and rebuild with high compression rotars. Ok, now lets assume this is done.
I want the engine to be carbureted just for simplicity, and fairly low cost.
I would like to run the 2 B ports off the carb's secondaries and the S ports (stock or maybe streetported) off of the carb's primaries (makes sense right)
I think i want to use a 500cfm Edelbrock Thunder Series carb, because from what i hear they are simpler to tune and i dont have to really do anything except plug a little passage and the carb will be good for 1g+ acceleration in any direction with no fuel spilling or starvation of any kind (at least thats what the tech guy at Edelbrock said).

First, why is it that most of the carb set ups i read about for rx7s include open spacers? Is there some reason for this? Doesnt this hurt low end power? Strong vacuum signal for carb but low air velocity in intake... ?

With a 500 cfm carb will my S ports make enough vacuum signal for decient low end power and gas mileage (below ~4000rpms) and is there any chance the B ports will out flow the secondary side of the carb at high rpms? Obviously gasmileage isnt a huge concern, but i dont think it will be THAT bad on the highway if i get this set up correctly and as long as i keep my foot light.

Also the secondaries on the Edelbrock are adjusted with a screw to change spring tension, but i have read about people having trouble with vacuum secondaries on rotaries, is this true? why?

Any light you guys can shed here is very much appreciated!

Skabidat

Bump!