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Old 02-14-2008, 05:14 PM   #1
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injector to carburetor pros/cons?

A thought has been going through my head for a while now: should I change my throttle body injection system to a carburetor? I would do this to get some control back over the engine, as it is all computer controlled. I know I could probably mess with the idle even though it says "Adjustments are not possible on this unit, as all functions are computer controlled" . I just think it is idling at where it should be but I think it could be lower.

I was wanting to know what the pros and cons of switching would be, in reference to economy. I would be able to control the amount of fuel going to the engine more directly, but I wouldn't have any way to try to figure instant mpg.


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Old 02-14-2008, 05:44 PM   #2
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you may get some control back but without major tuning and constant adjustment (time effort knowledge) you won't get better mileage. that being said, if you are willing to do what it takes, there's definitely potential...

you probably wouldn't get as much gains for similar cost going to a customizable aftermarket ECU like megasquirt and get it programmed it well and keep tweaking yourself. add some minor NA mods like headers and exhaust and you can certainly gain some mpgs.

EDITed some of the above to revise standpoint from further thought. carb=step backwards

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Old 02-14-2008, 06:14 PM   #3
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It's unlikely you would improve efficiency IMO. One reason for this is the variation in BSFC at any rpm vs. another. Where an EFI system can be tuned to compensate for slight variations in efficiency as rpms change, carburetors are more of a 'one size fits all' approach. In other words, where it runs best is the average of fuel needs over a range of rpms, but not necessarily the most efficient at any specific rpm.

Don't do it. You'll probably regret it unless you are really just thinking you want to increase airflow and power potential.

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