IDF Racing Beat
 

Ok guys I need HELP!!!!! I'm a ROOKIE when it comes to Rotary engines, The engine is bone stock early 13b (1974), the only mods are (84) ignition, MSD coils and a racing beat header. I installed a .40 IDF weber Racing Beat system in the car, worked on it all day. After many attempts I finally got it to run for about 3 minutes as long as I was giving it gas the engine would run, then I took my foot of the gas pedal and it shut off. I tried to restart it and it wouldn't start. I would really appreciate if anyone can look at my set up and see if I have anything wrongly connected i.e. vacuum lines, oil lines, etc. I have the FPR set at 3-4 psi. the Main Jets are F-11 and 210.

thank you all in advance.

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if that's not a typo, and you really a single 40 on there, then i think that's your problem. i suspect you could probably play around with mixtures and get it to idle, but in the end i think you'll be chasing your own tail.

what idle jet does it have? it is probably going to want to be a 65ish

Where did you get that? I didn't think RB made a manifold for IDFs.

That nipple on the side should go to the vacuum advance on the distributor. Try plugging it for now and see how it runs.
https://cimg0.ibsrv.net/gimg/www.rx7...4abff81a95.jpg

touch the gas and it dies? makes me think float related.

The guy I got it from mentioned it was RB. which nipple are you referring to?

The one on the front barrel, above the mixture screw, coming straight out.

Awesome thank you I hooked it up today......

anyone know where I can hook up the oil injector lines?

The intake you have is a Cartech, part of a early 80's turbo kit.

Did a quick search and found this thread for a picture of the kit, not my car but i had the kit.


>>>>>>> https://www.rx7club.com/1st-generati...rbo-fb-148287/

How does it run now?

On the stock set up the oil nozzles are just above the throttle butterflies. I've seen an IDA that had tubes inserted above the float bowl so the oil drips into the fuel, but I'm not sure if that mixes it adequately. If you do something like either option, a linkage that acts on the OMP lever should be set up.

So, I'd say premix is the easiest method.

Awesome thank you!!!!

That is not a racing beat setup. Racing Beat only did the 48IDA Weber carb; never the 40 IDF carbs. The 40 IDF carbs were too small.

Injecting the oil into the float bowl is the standard way to do it on a street driven 48IDA. It worked fine for me for decades.

The 48IDA jetting information is not directly applicable to a 40IDF.

When tuning any Weber, knowing the venturi size you have is extremely important. A listing for a particular set of jets only works with the size of venturi listed for those jets. In general, when you go to a bigger venturi, you need to have bigger main jets and smaller air jets. If you put in a smaller venturi, then you can go with a smaller main jet and a larger air jet.

In my 25 years of running 2 barrel Webers and Weber copies on rotaries, the 40mm carb is too small for even a street ported 12A engine. Don't waste your time, I would sell it and get something else.

where did you get the manifold from, have you still got it?