VSV Question?
 

After discovering that the vsv in front of the starter had a hole in it I ordered another one thinking that it must be important. My question is of what it does in relation to the butterfly in the main intake that splits the runners into two sets of 3. Also would it be better to use Toyota red antifreeze of water wetter that I see advertised everywhere.

Any info would be appreciated. Thanks

The butterfly modulated the dynamics of the incoming airflow creating what essentially amounts to an intake which is able to switch between long and short runners as needed (volume vs velocity).

Water wetter is ONLY a dielectric insulator. I don't recommend using it in place of a regular coolant additive in a daily driver.

so when does it switch and is there a way to know if it is working

I've datalogged it with my MAFT Pro in the past, the specs say 4200RPM and over 2.7v (approx 70% throttle), but my results were quite different. That's all rather academic though. With the car running rev the engine up over 4K and you should see the actuator diaphragm's armature move. Another option is to put a resistor and LED across the vsv's wires, don't forget to add a 1n4xxx diode to clamp any induced surges. Then you'll have a little light to reflect whenever the ACIS is active.

cool thanks alot

Toyota said the vsv is discontiued. Any idea of where to get one?

Salvage yards, Ebay, and for-sale ad's on here and other Supra-related forums. Be aware they are VERY fragile and the filter-tube easily broken when you handle them.

Mercedes. ;)






More later.

maybe a compatable part made for a german car?

Actually, many VSVs can be found that work just fine once you figure out which nipple opens or closes when. Go to a salvage yard and grab a handful from a couple different cars and test them.There's a Mercedes VSV that'sa popular replacement for the Heater Control Valve's VSV as it's MUCH less expensive and works the same.

http://www.supras.com/06/techcenter/display.php?QID=67