wild_maxx
Offline
1805 posts
89 240sx money pit
pullman WA
6-28-2004
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| « Re: Watch this vid and tell me if you hear compressor surge. (jmwenick) | 9:17 AM 4/19/2007 |
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doesn't sounds good.... I can't really hear it over that gay *** music and the fruitcake singing it in the pass. seat.... try another vid without that guy.
http://www.putfile.com/sk8142"**** all these gun-toting Hip gangster wannabes" - Maynard J. Keenan
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jmwenick
Offline
764 posts
1991 240sx Base Model
Mount Juliet TN
3-19-2004
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| « Re: Watch this vid and tell me if you hear compressor surge. (wild_maxx) | 10:17 AM 4/19/2007 |
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haha, it wasn't really a vid I wanted to post on here, but I wanted to know for sure if it was surge. I have a dsm BOV coming that I'm going to try out.
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GEO
Offline
6437 posts
95 240sx KA-T
Berlin NJ
7-7-2003
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your A/F is WAY off as well,
GEO
95' 240sx KA-TGeo's Ride
Click the above image to check out my ride!   
NICO NITE KREW
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jmwenick
Offline
764 posts
1991 240sx Base Model
Mount Juliet TN
3-19-2004
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| « Re: (GEO) | 12:07 PM 4/19/2007 |
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Yes, it has been strange, especially that night. When I let off the gas totally, the car reads 12.3, but its just cause the AFR goes off the chart. But anyway, I will be getting a SAFC soon to fine tune. But what about the sound? Is it compressor surge?
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onepuff
Offline
225 posts
cleveland oh
12-21-2006
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| « Re: (jmwenick) | 12:46 PM 4/19/2007 |
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i'd say definitely compressor surge
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GEO
Offline
6437 posts
95 240sx KA-T
Berlin NJ
7-7-2003
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Well it kinda of sounds like the SSQV
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nissanfanatic
Offline
1314 posts
1992 Nissan 240sx SE
Gainesville Fl
11-1-2004
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Yes, there is some surge. Its probably nothing to worry about. I get that sometimes in the lower RPM as well..
-Cory
Street racing fatalities: 0.21% of total fatalities in motor vehicle crashes.
FTC1992 Nissan 240sx KA24DE-Turbo: The "Showcar"
Stock internals
532whp/486ft.lbs-30psi
12.6@122.3mph-22psi
http://ka-t.org/cory_b.php
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jmwenick
Offline
764 posts
1991 240sx Base Model
Mount Juliet TN
3-19-2004
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| « Re: (nissanfanatic) | 3:09 PM 4/19/2007 |
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Yes, but thats all I can hear. There is no crisp sound at all, just the fluttering, and it happens even when I am at 6k RPM's.
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rn240sx
Offline
871 posts
240sx with ka turbo
Orlando FL
1-5-2004
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| « Re: (jmwenick) | 5:27 PM 4/19/2007 |
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All i heard was music and someone singing constantly... Next time do a video of racing only so that we can hear it better...
Matter of fact i didnt hear any bov at all....!!!
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Edub1
Forum Sage
Offline
1931 posts
89 240sx KA-T
Detroit MI
11-10-2005
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My DSM sounds exactely the same except in my car you can hear the turbo whine.
American soldiers don't sign up to die for their country, they sign up to make the other poor son of a ***** die for his. Hoorah!
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C-Kwik
Moderator
Offline
8140 posts
2004 Nissan Titan LE Crew Cab, 2005 Honda CBR600 F4i
SoCal CA
8-2-2002
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It's just BOV flutter. Surge occurs within the compressor housing. If you go back and find a BOV comparison test that Turbo magazine did years go, it shows graphs of the pressure over time for each. The graphs show that every single one had oscillating pressures that diminish with time. This is quite inline with flutter. Some flutter is more audible than others. But flutter in that of itself is not surge. Surge can occur even with BOV if it can't release enough air and/or pressure whether there is flutter from the BOV or not.
"Bad Driver's Famous Last Words:
Watch This!
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WDRacing
Porn Crusader
Offline
16864 posts
1995 240SX, K5 Blazer
USA
11-25-2002
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| « Re: (C-Kwik) | 12:52 PM 4/20/2007 |
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GAYEST video ever ward nominee...WOOOT. Singing rap music in a car with another dude while holding a video camera   I want my 2 minutes back...
 Truth is Treason in the Kingdom of Lies - Ron Paul
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jmwenick
Offline
764 posts
1991 240sx Base Model
Mount Juliet TN
3-19-2004
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| « Re: (WDRacing) | 1:59 PM 4/20/2007 |
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^ Sweet, can you get me a T-shirt for that award? Anyway, I had my friend ravving up the car yesterday, and I couldn't even see the Bov diaphram moving? And I hearsd the flutter throught the intake filter, so it has to be surge doesn't it?
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C-Kwik
Moderator
Offline
8140 posts
2004 Nissan Titan LE Crew Cab, 2005 Honda CBR600 F4i
SoCal CA
8-2-2002
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Possibly, but HKS SSQV's have essentially 2 valves. Under light loads, only the inner valve opens. It may be a bit hard to see that. Not to mention that light loads would not induce much boost pressure if at all. Likely not enough to cause surge or at most, any significant surge. Here's a diagram of the SSQV and how it operates: http://www.hksusa.com/products/more.asp?id=792
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nissanfanatic
Offline
1314 posts
1992 Nissan 240sx SE
Gainesville Fl
11-1-2004
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http://www.youtube.com/watch?v=MU5Y6d9rh1kThat video will show you what compressor surge sounds like.
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WDRacing
Porn Crusader
Offline
16864 posts
1995 240SX, K5 Blazer
USA
11-25-2002
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| « Re: (nissanfanatic) | 4:49 PM 4/20/2007 |
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Best video I've seen yet explaining comp surge...this is going in the sticky.
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Edub1
Forum Sage
Offline
1931 posts
89 240sx KA-T
Detroit MI
11-10-2005
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If it's the type that stays open at idle it would make sense that you will hear some flutter any time you return to idle from a decent throttle angle. You are going from 0 to -20psi.
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