Is Compressor Surge/Flutter Inevitable?
Dec 5, 2005, 07:44 AM
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Is Compressor Surge/Flutter Inevitable?
Well I've been adjusting my Greddy RS BOV and noticed:
No matter how loose I go I will get Flutter at Partial Throttle (anything lower than 0 Bar on the Boost Guage) and the Boost Leaks slightly ( Fluctuates 1.4-1.6 Bar) at WOT.
If its I adjust tight on the BOV then the Bosst hold 1.6 Bar WOT but Flutters at about 0.4 (Full Throttle) Bar and lower (Partial Throttle)
Question is, the Compressor surge is normal at partial throttle? and if so Should I just find the sweet spot between the 2 scenarios above?
No matter how loose I go I will get Flutter at Partial Throttle (anything lower than 0 Bar on the Boost Guage) and the Boost Leaks slightly ( Fluctuates 1.4-1.6 Bar) at WOT.
If its I adjust tight on the BOV then the Bosst hold 1.6 Bar WOT but Flutters at about 0.4 (Full Throttle) Bar and lower (Partial Throttle)
Question is, the Compressor surge is normal at partial throttle? and if so Should I just find the sweet spot between the 2 scenarios above?
Dec 5, 2005, 07:53 AM
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First of all, that is not compressor surge, your BOV is just too tight. I'm afraid that the BOV you have choosen is just not up to the job. This horse has been beaten to death. The best solution for lightly modded evo's is the JDM MR BOV or the Evo IX valve. If you want to he the sound, then get the APS half recirc/ half VTA. I've heard forge has improved their product but I really don't have experience with it. Anything else is just crap. Sorry.
Search. Last time I checked, evom had no shortage of BOV threads.
Search. Last time I checked, evom had no shortage of BOV threads.
Dec 5, 2005, 03:29 PM
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I agree with QAT-R the Greddy RS is not a very good BOV. I had it on my MR and it would constantly flutter no matter I how I adjusted it. I just bought and installed the new Agency Power BOV which you can vent 50/50 or full recirc. Right now I'm 100% recirc. and no flutter at all but then again its only been 2days since I had this new BOV
Dec 6, 2005, 10:25 PM
#4
ya that is compressor surge 1) make sure its hooked up the right way discharge end either to atmosphere or intake. 2) also make sure its not to tight. 3) you might have to change your driving habbits. let off quicker, build more boost then let off, etc. sorry for the bad news i went through the same thing i got a gretty type s
Dec 6, 2005, 10:50 PM
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I didn't have an RS but I had a type S that worked well after I did the single spring mod. Not sure if it applies to the RS. Check out the thread on BOVs by silver surfer, very good info there.
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Dec 8, 2005, 09:44 AM
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did you even try the single spring mod? Many people have gotten their type s to work well with it, including myself.
Last edited by 95GSXtoEVO8; Dec 8, 2005 at 09:51 AM.
Dec 10, 2005, 03:30 PM
#11
Originally Posted by mooreboost
I haven't read of a single person being dissapointed with it.
It's an awesome piece.
It's an awesome piece.
still playing around with it, curious to know what kinda settings everyone else is runnin. 50/50 is pretty loud, fun for a little while, but loud, most likely will be 100% recirc'n
Dec 12, 2005, 09:28 PM
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i get the same flutering sound only when i boost a little over vacuum and drop it. ON wot i dont get it. I just installed my not long a go and didnt adjust the bolt at the top...do i need too? Here is a pic of mine..as you can see bov is hooked up on the IC pipe
Last edited by jesterEVO; Dec 12, 2005 at 09:30 PM.