Im doing some work on calculating AFRs and tuning adjustments and Im curious to know the diameter of the buttefly valves in the TB

 

The throte diameters are 45mm, for both primary and secondary, if that helps any. It's in the Technical Specifications in the FSM.

 

Thanks!

 

How is throttle size relevant to that?

 

Im trying to calculate mass flow rate

 

Unless you're measuring velocity through the throttle bores, the size won't help you calculate flow.

 

another question: when I had my RX-7, whenever I upshifted, I let go of the gas completely and depress the clutch. When I depress the clutch the RPM's would go up alittle before dropping. I figured out it was the idle. Someone told it had to do with the butterfly vavle and clean that with some can of spray. So question is: anyone know what spray he was talking about?

 

throttle plate cleaner. or carb and choke cleaner

 

That what it's called? coolio, thanks.