Why everyone carb swapping?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Scooterwrench

Supporting Member
Supporting Member
Joined
Jun 11, 2023
Messages
2,659
Reaction score
5,065
Location
Fanning Springs,FL.

99xcss4

92g-94c frank'n (truburban) K-2500
Joined
Apr 22, 2020
Messages
4,849
Reaction score
7,301
Location
las cruces new mexico
maybe just a little bit but in all seriousness my #1 for carb is tied between q-jet and t-quad 2nd is edelbrok 3rd is holley as much as I like tbi it seems like a glorified electric carb

now for some more fun and joking around one of my favorite sayings is dont $#!+ next to my teepee and I wont burn your down
 

Scooterwrench

Supporting Member
Supporting Member
Joined
Jun 11, 2023
Messages
2,659
Reaction score
5,065
Location
Fanning Springs,FL.
maybe just a little bit but in all seriousness my #1 for carb is tied between q-jet and t-quad 2nd is edelbrok 3rd is holley as much as I like tbi it seems like a glorified electric carb

now for some more fun and joking around one of my favorite sayings is dont $#!+ next to my teepee and I wont burn your down
TBI is a glorified electric carburetor with much better fuel control and feedback. The only thing better than one TBI for me would be three on the same manifold. There is something sexy about three deuces sitting on top of a motor.
 

Pinger

I'm Awesome
Joined
Mar 10, 2020
Messages
3,193
Reaction score
6,449
Location
Scotland.
How does TBI meter? If it is as multi-point injection systems, how does it avoid starving cylinders during the 'off' period? Or, does it provide continual flow and meter by varying fuel pressure - as per Bosch K-Jetronic?
 

Scooterwrench

Supporting Member
Supporting Member
Joined
Jun 11, 2023
Messages
2,659
Reaction score
5,065
Location
Fanning Springs,FL.
How does TBI meter? If it is as multi-point injection systems, how does it avoid starving cylinders during the 'off' period? Or, does it provide continual flow and meter by varying fuel pressure - as per Bosch K-Jetronic?
No, TBI has a constant pressure FPR and is a wet intake system so the intake is never completely dry in the running state. It's not really continual flow as the injectors pulse in both asynchronous and synchronous modes as the ECM demands. Like 99xcss4 said it's a glorified carb. It meters by taking sensor data and modulating injector pulse width to feed the engine with fuel and air as needed.
 

Scooterwrench

Supporting Member
Supporting Member
Joined
Jun 11, 2023
Messages
2,659
Reaction score
5,065
Location
Fanning Springs,FL.
How does TBI meter? If it is as multi-point injection systems, how does it avoid starving cylinders during the 'off' period? Or, does it provide continual flow and meter by varying fuel pressure - as per Bosch K-Jetronic?
I never had my hands on one of those Jetronic systems but I did have the unfortunate opportunity to work on its earlier version, the fully mechanical CIS system in a VW Rabbit. I got the thing back up and running once I figured out the thermal regulator had gone bad but just never really got it dialed in. After F'in with it a couple days I sent it down the road!
 
Top