What is the difference between ida and idf

JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Thread starter ricadona Start date Jan 5, Will drivability suffer much from the change over? Daytona I looking at going down the same track, haven't found a suitable supplier yet. Cheers John. Kevin M. Rick, You said that you have an EFI setup and want to change to quad throttle bodies.

Good Luck, Kevin. Mike Dozier. Don't forget Wayne Presley's setup. JimmyMac Lifetime Supporter. Paul Thompson 'Hooligan' Admin. Don't forget Kinsler too.. Thanks all for the info. I would have thought a throttle body on EFI would be pretty much common. Regds, RV. Throttle bodies made to look like fake carbs… Interesting idea.

If you are going for an authentic look, IDAs were the carbs used on the real cars. Posted 20 September - PM. Posted 22 September - PM. Community Forum Software by IP. Sign In Create Account. Javascript Disabled Detected You currently have javascript disabled. Please log in to reply. Posted 20 September - AM just trying to figure out whats different about them. Edited by stardude, 20 September - AM. Posted 20 September - AM Maniflow? Or Avonbar? Go me! If you want all out performance, seems the IDAs are the way to go.

IDF tuning seems to maybe be a little easier from what I have learned. Changing out the jets, imulsion tubes etc is a snap. Takes longer to set up than change em out. If you're running a big valve, big cam high revver, then I'd stick with the 48s. I never want to run out of fuel i. The low end can be jetted appropriately for proper tune. Those are my thoughts Dean Lampe. It is really the choke size that matters.

For example the 37 mm chokes come stock on the IDA and according to the weber charts, that is a little small for a ! When you run out of carb on the top end you will not go lean because it is a function of reduced air flow.

It isn't a lack of fuel. I would go with the 48's. I have Idf's on a buggy and IDA's on the Peter Jankovskis. Could not find a setup that worked well at both the top end and driving around town. IDFs do have the advantage of being far less expensive. David Briggs. The IDF's are an improved design and have a simpler idle circuit, the idle mixture screws on the IDF's stick out the side towards the valve covers and you can't get a screwdriver on them, it gets very toasty for your fingers when you are adjusting the idle mixture!

On the other hand once they are set up they seem to stay in tune. Both of them are very sensitive to fuel pressure I use Carter rotary pumps that are factory set to approx 3 lb's pressure. Set up correctly they are just like fuel injection, only sexier! Mike Trusty GT40s Supporter. Here are some observations and comments that some might not have realized about Weber carbs applied to relatively large displacement v8's.

A V8 setup with IDA and stock 37mm chokes actually flows less air and fuel than a plenum manifold and proper four barrel carb. Consider that the motor has two cylinders on the intake stroke at a given time which means that the effective flow through the 4 barrel is providing one half of its total throttle area to each cylinder at full throttle, i.

I understand it is much more complicated than just that but to keep it simply lets leave it at that.