Quote:
Originally Posted by Joe DeMarzo
So the CFM of a FI and carb are currently not even if someone was to swap it out at the track? Also I presume the manifolds would not be an even swap????
When looking for an advantage in my original question how would you measure which would be faster or make more power theoretically?
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These are just my opinions, I'm not looking for any arguments here.
Joe, you are trying to find an answer that I don't think anyone can give you(I know I can't) because you are trying to compare carb and FI combos based on the restrictions of Stock Eliminator. Adger just brought up atomization, the biggest barriers to keeping fuel suspended are throttlebody(carb)size, manifold and port shape, how fast you can get velocity in both AND the intake valve. If you've got a carb 305 over here, it's got a really good intake and head, a big carb that has to mix fuel and air in itself and send this wet mixture through a runner at a speed that will keep all of those little droplets of fuel from falling out of suspension in the air while it travels through the carb, intake(lots of sharp turns, not good) and intake runner which takes velocity. So at low RPM you will have poor velocity but at high RPM you may be able to sustain a higher HP number(RPM potential). With a TPI 305, you have a dry throttlebody and intake that don't need to suspend those little droplets of fuel through all of those twists and turns BUT that nifty little intake is reasonably small and can't be easily "enhanced" like a regular Q-Jet manifold. It wasn't built to make HP at high RPM. Also, in a carb combo you don't gererally get any puddleing(sp?) at the intake valve like you would in a batch fire port injection combo. Sequential FI wouldn't have this problem.
I don't know where else to go with this Joe. I've tried to explain the differences in how these two combos work and why as simply as I can. That 305FI intake only gets worse on a 350. The LT-1s and LS motors don't have as much of a problem as they have better intakes. Remember, you were talking Stockers here.
And I won't even go into carb vs. FI headers.