Quote Originally Posted by sandasharpe View Post
I remember getting in a new VC (Blue motor with Rochester Carb) and being impressed with how much more go it had over the red motor and returned better real world fuel economy as well. It was a big improvement over the 2 barrel
True, the 253 in my WB goes real well. I was expecting a motor swap (for the stroker I have ready) to be the 1st thing I did to the van when I got it, but it's running so well that I may leave it there until the van is done.
The 4 barrel (and whatever late model updates) makes the 253 a much better motor than the early ones.

Taily, you are 100% correct about the flow through the small primaries on the Q-jet. Most of the time it's behaving like a good 2-barrel anyway until revs and load are right for the secondaries to open. (If the Trimatic kick down coincides with the secondaries opening it really gets moving!)