me and my friend got into an argument and i need some help...is it possible to have PFI on a carburated engine? [Programmed Fuel-Injection]
btw the car is a 1989 honda CRX
btw the car is a 1989 honda CRX
fuel injected carburated engine?
- Thread starter PROJECT N00b
- Start date
I don't think so. I actually got confused a bit when looking at my buddy's 91 Suburban. It LOOKED like a carb, but it said it was EFI. So I called my friend Joe who's a nut for Chevy trucks and he told me something about how the air intake looks like a carb unit but the fuel is still injected into the airstream further down the way unlike a normal carb which I believe uses the pull of the air through the venturi to "pull" in fuel through the main jet.
A lot of cars in the mid 80's were TBI (Throttle Body Injection), including Hondas from that time. My uncle's 1989 Civic was dual injector throttle body injection. I'm guessing the CRX is a very similar setup.
It just injects the fuel earlier in the system, instead of an injector for each cylinder.
It just injects the fuel earlier in the system, instead of an injector for each cylinder.
L
lanky189
Guest
are you speaking of doing both?
GM in the 80's used map sensors and feedback carbs, that were a carbed setup, but used FI components to monitor and adjust certain aspects like ignition timing etc...
so there is a combination of both..however its terribly inefficient and really not worth the trouble..
twin charging on the other hand....
GM in the 80's used map sensors and feedback carbs, that were a carbed setup, but used FI components to monitor and adjust certain aspects like ignition timing etc...
so there is a combination of both..however its terribly inefficient and really not worth the trouble..
twin charging on the other hand....
They put fuel injection yes, but back then it was mechanical fuel-injection. Not programmable (or electronic). I think it was the Hillborn fuel injection system. The argument here is if a CARBED motor can have PFI. I still think the answer is no, because I've heard of a 440 Hemi being retrofitted with EFI, but it is no longer a Carbed Hemi. You can CHANGE it over to EFI, but you can't have both unless maybe, you want a REALLY rich mixture and have thrown back a few beers. If you have a "carb" and fuel injection elsewhere down the line, it isn't really a carbed motor since a carburetor feeds vaporized fuel AND air to be combusted. You just have a fuel-injected motor. The advent of electronic fuel injected used computers to monitor the flow of fuel and air rather than the whole mechanical carburetor setup which depended on the jet size to give a guesstimate of how much fuel was flowing. This allowed EFI to adjust fuel amounts on the fly. Mechanical fuel-injection(MFI) was better at producing power (than straight carb), but the fact that the fuel amount couldn't be optimized on the fly hurt both the carburetor and MFI's ability to idle steadily, and maintain low rpm's without bogging down. Back when the MFI was invented, the cars it was attached to were not streetable and were practically all drag cars.I<3Supras said:
I don't think that qualifes as fuel injected if the fuel is still dumped in with the air through a carburetor. Using FI components to monitor ignition timing etc. I think is more commonly referred to as a computerized carburetor. Joe agrees, however, that TBI is crap.lanky189 said:
Last edited:
L