Im solly, that was you original question too. Maybe not answered specifically cause when a guy swaps out a carb for EFI on the same engine there are so many other things that get swapped out too its just not a good comparison.does anyone else have efi vs carb comparison?
looking for info on throttle response and part throttle driveability
thanks for the informative reply.Im solly, that was you original question too. Maybe not answered specifically cause when a guy swaps out a carb for EFI on the same engine there are so many other things that get swapped out too its just not a good comparison.
But I have driven both carbed 350s and EFI 350s in a similar car and my observation...
FI, snap throttle response. Never driven a carbed car with exacting throttle response. And the larger the carb the worse it gets. Off idle, FI is right on, mid RPM cruising, tap the throttle, its on the juice now. Get a small enough carb though and cruise response is pretty good, people tend to over carb their STREET engines.
And dont forget about the electronics. You dont have any mechanical advance with FI. Computer controls the advance. I look at mechanical advance like I do a carb. Is a slow progression to where you want to be when you stab the throttle.
Electronically controlled fuel metering and spark is faster than mechanically controlled spark and fuel. Oh man, waiting for the volume of air to increase (RPMs) to draw fuel on a carb. Stab the throttle, low vacuum, wait for Rs to come up to pull more fuel, a carb. LOL And it does happen so much faster than I just wrote, but thats the simple idea of it.
Prolly works good in a tractor, but for a modern car I just dont see it. OH wait!!! I was only talking about a street car. 1/4 mile car, carbs still have a place. Why?? Cost.. For 1/4 mile its about dumping fuel. You can dump large amounts or fuel for less money than you can with FI. But there are FI systems that can dump as much fuel as you want, money, money....
More?? Fuel economy. Oh, and you can run a higher compression ratio also, street car. I could go on and on.
Why a carb??? Cost, plain and simple. JR
Oh yeah, I forgot one, elevation changes. I seemed to have forgotten about that. Kinda diff but I have an old motorhome, carbed 400. Im at sea level, when I go to about 2500ft I REALLY notice it. Like Im driving with the brakes on. EFI doesnt suffer there. JRIf it's more of a race car than a street car, you likely find you need some fine tuning for differing ambient conditions at different tracks due to elevation and weather conditions.
this is exactly why Ive decided to convert. the ability to change my fuel ratio on the fly and the ability to design and tweak my own custom ignition curve is what I find extremely exciting.But the bottom line is EFI let's you put the Air/Fuel ratio EXACTLY where you want it under all conditions.