john blaze

iTrader: (16)

is there any way to eliminate low boost flutter from bov? whenever my car sees boost and i ease off the throttle, the bov surges causing my car to bog. is there anyway to elimiate this? it drives me crazy when im on the highway. btw recently changed to a greddy rs bov hoping that adjusting it to hard would help eliminate the problem, but its the same as stock. help please thanks

bluebanana23

iTrader: (26)

make sure the diagphram isn't torn on the greddy unit. You are recirc. right?

RevMoto

iTrader: (19)

I have had this problem with every valve besides a stock IX valve. My Tial did the same thing too and they said that the cause is the stock turbo being on the surge line. I just got a synapse valve and will be seeing how that works.

Rushin

iTrader: (4)

Run the BOV vacuum line directly from the manifold. Make sure nothing else is tapped in to it, especially an MBC. Also, make sure the line has no tears. This fixed the fluttering with my TiAL.

BoostIsMyDrug

iTrader: (35)

I have a IX DV, and still get flutter. I think there was a write up on this in the "How To" section. Something about tapping the LICP with a vacuum nipple...? I think I'm going to try Rushin's advice first though. Thanks man!

scumrat

iTrader: (1)

here ya go!
https://www.evolutionm.net/forums/ev...utter-bov.html

BoostIsMyDrug

iTrader: (35)

Yeah, that's it.

I was just way too tired to look for it.

john blaze

iTrader: (16)

yea i do have my mbc tapped into the bov line. i guess thats my problem this whole time. thanks alot bro.

john blaze

iTrader: (16)

would it matter if the bov is vented vs. recirculated as far as fluttering goes?

Rushin

iTrader: (4)

It shouldn't have an effect on fluttering. Just run your MBC from the LICP nipple and you're set!

churbo

iTrader: (2)

Need to do this as well. I thought I was just going to have to live with it.

RevMoto

iTrader: (19)

my mbc has been ran from the licp for awhile now and my valves still flutter in 5th on the highway. Most annoying thing in the world when you have to commute three hours.

Rushin

iTrader: (4)

If it's only in 5th at low rpm, it could be your turbo surging

cij911

iTrader: (14)

I agree with the post above....sounds like you may be talking about surge rather than flutter....at what rpm and throttle % does this occur ? what do your maps look like in this region ?

RevMoto

iTrader: (19)

it flutters anywhere from 4500-6000. I can't tell you what throttle percent but with certain valves it flutters differently. The tial fluttered at 13psi, forge RS at 8psi, and forge bov at 10psi. Now a stock IX valve is perfectly smooth.