AWS/BAC removal good or not
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AWS/BAC removal good or not
Hello,
I have an 88TII and was wondering the benifits or disadvantages of removing the air bypass solenoid valve and the bac all together. I also have the 3" full RB exhaust if that matters.....
Benny
I have an 88TII and was wondering the benifits or disadvantages of removing the air bypass solenoid valve and the bac all together. I also have the 3" full RB exhaust if that matters.....
Benny
#4
RX-7 Bad Ass
iTrader: (55)
The ABSV (air bypass solenoid valve) that sits on top of the upper intake manifold has ONE purpose in life - the 3000 RPM startup. That's it. Remove it and cap the vacuum lines that went to it - done. This will NOT affect cold idle, warm idle, etc. - just takes the valve that does the 3000 RPM startup out of the equation, that's it. Japanese RX-7's don't even have them.
The BAC is actually a good thing to have. I remove the two screws that holds the water pipe to the BAC and ditch that whole system. The BAC itself is not in the way, and is connected with only one plug - there's really no good reason to block it off. It helps out with the idle quite a bit, especially with the AC.
Speaking of, you CAN have a good cold idle with a gutted TB. What I do is adjust my idle with the BAC to about 500-600 RPM with the car fully warm. Then, I use the primary throttle stop to bring the idle up to 750 RPM. Doing this, I have a rock-solid cold idle AND a rock-solid warm idle. It takes a little monkeying about and tweaking, but it is possible.
Dale
The BAC is actually a good thing to have. I remove the two screws that holds the water pipe to the BAC and ditch that whole system. The BAC itself is not in the way, and is connected with only one plug - there's really no good reason to block it off. It helps out with the idle quite a bit, especially with the AC.
Speaking of, you CAN have a good cold idle with a gutted TB. What I do is adjust my idle with the BAC to about 500-600 RPM with the car fully warm. Then, I use the primary throttle stop to bring the idle up to 750 RPM. Doing this, I have a rock-solid cold idle AND a rock-solid warm idle. It takes a little monkeying about and tweaking, but it is possible.
Dale
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What are the coolant lines throught the BAC for anyway?
I am chasing a bad idle problem and have found that my BAC is bad, it will not click with 12V applied. I have no solenoids, but I still have A/Cwith hopes to use it someday. I was thinking about ditching the BAC, since it is bad, so I would have one less thing to check for my idle, but I guess if it helps with the A/C, then I might as well get a working one and put it on there and see what happens.
I am chasing a bad idle problem and have found that my BAC is bad, it will not click with 12V applied. I have no solenoids, but I still have A/Cwith hopes to use it someday. I was thinking about ditching the BAC, since it is bad, so I would have one less thing to check for my idle, but I guess if it helps with the A/C, then I might as well get a working one and put it on there and see what happens.
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Originally posted by SureShot
To jimmyv13 - if you still have the air solenoid rack, you could wire an air bleed to the AC clutch to balance the idle.
To jimmyv13 - if you still have the air solenoid rack, you could wire an air bleed to the AC clutch to balance the idle.
Why would the AC clutch need an air bleed?
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#8
RX-7 Bad Ass
iTrader: (55)
That's uncommon for the BAC to be stuck like that - that usually takes an engine fire or the like .
I would just try and find a BAC - they're a dime a dozen. Make sure to get a BAC from the same type of car you have - NA and TII are different, and '89-91 and '86-88 are different.
The water line on the BAC is for SUPER cold climates to help keep the BAC from icing up internally and sticking. If it's that cold, I'm staying home . It's also partly for emissions - a warm intake charge atomizes fuel better and makes for better emissions, but not necessarily better power.
Dale
I would just try and find a BAC - they're a dime a dozen. Make sure to get a BAC from the same type of car you have - NA and TII are different, and '89-91 and '86-88 are different.
The water line on the BAC is for SUPER cold climates to help keep the BAC from icing up internally and sticking. If it's that cold, I'm staying home . It's also partly for emissions - a warm intake charge atomizes fuel better and makes for better emissions, but not necessarily better power.
Dale
#11
RX-7 Bad Ass
iTrader: (55)
It's much trickier to get a good cold idle with no BAC. I really don't feel there's a good reason to remove the BAC - again, it's not in the way, and you never have to take it off, and it is generally extremely reliable, save needing a cleaning every 60,000 miles or so.
Dale
Dale
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