General piping and hose size questions

[onecrazyfoo4u]

First off, whats the stock size recirculation bung on the intake? I need to order a greddy adapter and don't know what size to get, there's 4 different choices: 19, 29, 32, and 34mm. Which one should I order?

Also, what size is the stock throttle body? I'm getting ready to order a fmic kit and kind of want to know the size of pipes for the cold side and hot side I should get? When these pipes say 2.75", is that the inner diameter or outer?

And lastly, when gauges are measured say 2 1/16", does that many the outer most diameter? Thanks for all the help!

[Steve Lloyd]

2.75" on the throttle body. the piping is outside diameter, as for the gauges, that's the mounting hole size, most gauges have a ring around them that is larger than the stated size, but the stated size is for mounting purposes.

hope this helps..........

[onecrazyfoo4u]

The TB is 2.75" on the inner side though, correct? That helps for the gauges then, since it's a 2 1/16" gauge, then I should get that same size holder then right? Thanks for the help.

I still need to find out the stock size for the recirculation tube on the intake though...anyone?

[onecrazyfoo4u]

I was told that the stock recirc tube was 1" outer diamter. But greddy only makes recirc fittings for my type RS in 19mm (3/4") or 29mm (1 1/8"). Which one should I order? What size or recirc fitting is everyone else running with the greddy bov? Help me out please!!!

[9240sx]

Im running that BOV and you need the 29mm fitting.The stock size is just that..1" So it works perfect.

[onecrazyfoo4u]

Sweet! Thank you sooo much man! Got one more quick question for ya, since I don't know anyone else running the Greddy RS....How does your bov sound? I'm just running stock boost and when I let off boost, it'll chatter or flutter for a sec, then give out a big woosh. I thought it was just supposed to woosh was all? I was told to loosen the screw on the top, but when I do, it just sits there and spins freely, like the screw doesn't move in....so there's no way to loosen it. Please let me know man, and thanks again!

[9240sx]

Sweet! Thank you sooo much man! Got one more quick question for ya, since I don't know anyone else running the Greddy RS....How does your bov sound? I'm just running stock boost and when I let off boost, it'll chatter or flutter for a sec, then give out a big woosh. I thought it was just supposed to woosh was all? I was told to loosen the screw on the top, but when I do, it just sits there and spins freely, like the screw doesn't move in....so there's no way to loosen it. Please let me know man, and thanks again!

I soulds almost like the stock unit did just louder...That flutter sound your hearing is called compression surge..You sould be apply to lossen the adjustment bolt..In fact it will come all the way out..Lossen the lock nut than the bolt with a allen head...This bov will only open above 4-5 psi anyway...Im running 12 psi right now and anything thing below 5psi i will get a light flutter sound..And my adjustment bolt is almost all the way out..Very common thing with all aftermarket BOV's..No big deal..as long as its opening at full boost your in good shape.

[onecrazyfoo4u]

Yeah, it opens at 7 psi, since I don't have a boost controller to turn it up yet. I'll loosen it as much as possible to see if that helps. It's just at low boost when I get compressor surge, so it's no problem. Thanks alot for the help though!