ok so i have a greddy rs bov on the car and at part throttle its flutters like crazy i adjusted both ways and still does

at wide open throttle it runs great

so i just took it apart and it looks like the diaphram is in good condition no tears but there is two springs inside one inside of the other is this normal? or should there only be one

anyways i just want this thing to stop fluttering at partial throttle so any help would be appreciated
thanks

AG

 

Look up the type s one spring mod. I did this on my rs and helped big time.

 

^^^^yea just found that im going to try that out but i have a red on the car now when i had the stock turbo it worked fine

do you have this on your car with the 35r?

 

just tried it it made it alot better now only flutters at part throttle in 5th gear

it also made it alot more quiet

 

Keep an eye on the diaphragm too. I did the 1 spring mod to mine which helped, but later on it started fluttering again and I opened it up to find several small cuts on the diaphragm.

 

hey whats going on hows that red doing???

and i had the type rs on mine for a while but couldnt stand the bicking and fluttering at partial throttle so i just put the stocker back on and its so much better not gonna lie and im on 30psi the stocks holding up haha

 

love the red ....
the one spring thing did help not perfect but alot better

not sure what ill do now since no one seems to have a straight answer on the best bov

might try the aps twin vent

 

Sell it and get the APS. I've had the Greddy, Forge and now APS.

The APS uses a heavy brass piston instead of a low-mass push rod and diaphragm like the Greddy and Forge. The brass piston is a mass damper for the system and doesn't flutter like the low-mass diaphragms.

You just need to make sure the APS gets taken apart and cleaned every now and then.

 

Yeah I have it on my 35r no flutter here with the one spring mod. 29psi .

 

i got my RS used. no fluddering at all. what-so-ever. just the bouncy idle issue at times.. ha

 

The solution is simple. Sell it and buy a stock metal MR or IX bov. Install it, crush it slightly if you want to run more than 30psi. Driveability will be greatly improved and you will hold boost just fine. I ran the forge (tried every possible spring combo) and it sucked. I switched to the RS, same thing but not as bad, but still made me mad as hell @ part throttle. Eventually got sick of it and got an I BOV, and I havent looked back.

 

take 1 of the springs out. you will notice it blow off and shut quicker.
I did this with my 240sx and it was having the fluttering problem.

 

yea a friend told me about the aps he said he has tried most of the bov and he like that one the most

i run a red and will do meth soon so the boost will be up there

 

yea i might try that next time someone has one for sell i will try to pick one up