bov flutter at high altitude

[eliminster]

so my rx7 originally came from ga and was tuned down there, while down there my bov had a nice strong release sound like it should. Once i moved up here it started to flutter badly so i released the tension on the bov to as soft as i could and still have some pretty wicked flutter. Just wondering if anyone else has had this problem and what they did to fix it, it is a greddy type s bov.

[vierte]

is it compressor surge or bov flutter?

Edit: just realized that this thread is a year old.. lol not a lot of new post in the FI section

[eliminster]

nah it was bov flutter since it was set for a little bit thicker air, but have since fixed it for everything but below 5psi which can't do otherwise it leaks.

[Number2]

the cure for bov flutter is the SYNAPSE diverter valve.
http://www.synapseengineering.com/

[eliminster]

I got the cure its called adjusting your spring settings, a hell of a lot cheaper too :P. Just was surprised how much of a difference it is from sea level to here.