I have a cheap xs power wastegate and at full boost 24 psi it will flutter up and down 5 or so psi so i took apart my wastegate and inside the wg the gasket has a small hole that looked melted almost. I am wondering if that would cause me to flutter like that and if so maybe would a nicer tial wg eliminate the problem. I currently have a Big Blue Spring and a Small Blue spring in the wg and am going to get retuned in about a week jw some suggestions. Thanks

 

bump

 

Somebody has to have some clue to if the melted diaphram for sure is the reason to my boost flutter???!!!

 

definately a issue. cheap parts with cheap material with a higher failure rate. not to mention a bad reputation. Get a Tial wastegate and your problems will go away.

 

Thanks for the input but has anybody had the problem before and pinpointed the diaphram to be the source of the problem? ill probably just go by a tial and post my results...more replies please

 

bump

 

You always need to inspect the CDM diaphrams prior to install as they are sometimes misalligned etc.Get a Tial diaphram slap it in and all should be good.

 

thanks im going to pick up the tial tonight thanks for the input ill let ppl know if it fixes the flutter wed when i get tuned

 

i have a tial, and its doing the same thing

 

really damn i just went out and bought a brand new tial wg... how much boost r u running and does it seem like ur dumptube dosent stay open or is it after u hit boost u hear the flutter

 

im running 27 psi now, it flutters under full boost, anything over 28psi. boost gauge fluctuates back and forth from 25-30psi. it could be tht im just over running the wastegate or the bov though. or could be comp surge

 

well comp surge is under vac i believe and the flutter im getting sounds like yours at full boost... so u just turned it down till the flutter stopped?

 

ya, mine is under full boost also. but ya, i turned the boost down a bit, and it helped alot

 

okay thanks im not putting it on and holding it to the floor until im on the dyno w a wideband but ill let everyone know if the tial upgrade fixed my problem

 

Going from a ebay WG with a torn diaphragm and springs that usually bind in the housing to a fresh TiAl - it should fix most of your boost flucuations. But so might a new diaphragm. SSauto actually sells a thick nomex replacement for ~$15, TiAl sells theres for $50-80 IIRC and should fix.

 

Thanks for the diaphram info wish i woulda know about that earlier but hey now i can sell my xspower one w/ a tial diaphram in it

 

Cheap diaphram was the problem now my tial holds great...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garage 808 Hatch &raquo;</TD></TR><TR><TD CLASS="quote">im running 27 psi now, it flutters under full boost, anything over 28psi. boost gauge fluctuates back and forth from 25-30psi. it could be tht im just over running the wastegate or the bov though. or could be comp surge</TD></TR></TABLE>
what spring? it's probably too weak

 

1 bar

 

yep, get youself a 1.3bar or higher

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TiAL &raquo;</TD></TR><TR><TD CLASS="quote">yep, get youself a 1.3bar or higher</TD></TR></TABLE>

what size wastegate spring do you suggest using with 24psi and a manual boost controller?

 

anything over a .9bar

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TiAL &raquo;</TD></TR><TR><TD CLASS="quote">anything over a .9bar</TD></TR></TABLE>

ok, thats what im running... a large green spring (38mm)

i was just wondering why my boost gauge flutters like crazy when i hit full boost.. the hondata logs show boost holds pretty steady within a few hundredths of psi. i guess maybe just shitty gauge?

 

its all good, i just ordered a black tial 44mm gate with the springs for ~ 18psi. should be good to go

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote">

ok, thats what im running... a large green spring (38mm)

i was just wondering why my boost gauge flutters like crazy when i hit full boost.. the hondata logs show boost holds pretty steady within a few hundredths of psi. i guess maybe just shitty gauge?</TD></TR></TABLE>
probably...or there may be a slight leak in the boost gauge line