Disassembling Greddy Type BOV

[200RX]

Hey guys

Found this write up and wanted to know if this can go the same for recirculation on a Greddy Type RS?

Hope this helps

v8killer2001Can we make this a sticky please? This comes up often, so I thought it would be useful to refer to the following procedure. Here is how you adjust the GReddy Type for recirculation mode:1. disassemble the BOV by removing the allen screws that secure the purple portion of the BOV.2. Inside, you will find an inner spring and an outer spring. Remove the outer spring and put it aside.3. Reassemble the BOV using only the inner spring inside. As you reassemble the the valve, be sure that the adjusting screw is in place and sticking down about 1/4". This helps align the upper spring perch.4. Once assembled, unscrew the adjusting screw and remove the locking nut from the adjusting screw. Wrap the lower half of the threads of the adjusting screw with plenty of Teflon tape.5. Screw the newly wrapped adjusting screw back into the BOV. Screw it in only a few turns.6. Get a hand held vacuum pump with built in vacuum gauge. These can be rented or purchased from an auto parts store.7. Attach the hose from the pump to the upper nipple of the BOV. Apply vacuum to the BOV by squeezing the pump. Continue pumping until you see the plunger of the valve BEGIN to lift off its seat. Note at what vacuum level this occurs by looking at the reading on the gauge built into the pump.8. Our goal here is to have the valve BEGIN to lift off its seat at around 10 inHg of vacuum. For example, if it BEGINS to lift at 18 inHg, you will need to loosen the adjusting screw. If it lifts at 5 inHg, then you will need to tighten the adjusting screw.9. If you cannot get the valve to BEGIN lifting at 10 inHg, don't worry......anywhere from 7 inHg to 15 Hg will be fine. 10 inHg is the target reading here.10. Once you have adjusted the BOV and gotten the readings you want, tighten down the locknut. One last time, squeeze the pump several times and look at the gauge. It should hold vacuum for a long time and not leak down. The Teflon tape here is necessary. Without it, the valve WILL leak down every time.11. This method is only valid for recirculated BOV applications, as the valve will be open at idle. If you are using your Type S as an atmospheric BOV, then you will need to tighten up the valve to be closed at idle. This means that the valve would BEGIN to open at about 23 inHG, depending on how much vacuum your engine creates.Good luck to all,

[Seishuku]

Yup, or at least it does on my Type RS knock-off. That's how I ran it when I was still running my MAF draw-through, but I run blow-though now, so it's vented.

[Emperor_Tha]

So the point is to remove the outer spring which would cause the valve to open at 10inhg?What is the difference between having and not havingthe spring while recirculated?Is it just for faster reaction? Cuz I get random pop from myexhaust in the lower speed/ rpm while cruising about under 2k at 15-25 mph

[kpodj61240]

yea i wanna know the same thing.