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  1. Friday 6th September 2013, 22:41 #1
    M-R-P
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    wastegate flutter

    a turbo noise I've not encountered before.. q

    so I fit New vac lines and a new genuine tcv to Grahams car. we go for a test drive and the induction growl is breathtaking, the power delivery is smooth but savage on WOT everything you'd expect from a well kept T5 with. RICA 310.

    here's the thing... when floored, you can hear the turbo spool and in comes the torque. as the boost builds to the point where the wastegate starts to cut, in there's a fluttering noise as if you can hear the actuator reacting to the fast pulse from the tcv. the flutter lasts less than a second and there's no loss of power and it's still smooth all the way through the rev range.
    I appreciate that it now has a rather loud and free flowing intake and the New tcv will be having an effect on the power delivery when compared to the 15 year old one it replaced but can anybody shed any light on this phenomenon? ive double checked all pipes and connections and everything is as it should be
    19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...

    310.2bhp / 333ft/lb

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    Got an old discovery now.
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    V70 Graham (Saturday 7th September 2013)
  3. Friday 6th September 2013, 23:05 #2
    Dangerous Dave
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    Graham has a REMAP!?!?!?!?!
    1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
    1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
    2004 Sapphire Black S60 D5 - The new daily hack.
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  4. Friday 6th September 2013, 23:13 #3
    M-R-P
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    Quote Originally Posted by Dangerous Dave View Post
    Graham has a REMAP!?!?!?!?!
    oh yes (picky bugger is on his second lol)
    19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...

    310.2bhp / 333ft/lb

    2016 Swedish Day UK "Best Modified Swede"
    SOLD

    Got an old discovery now.
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  5. Friday 6th September 2013, 23:26 #4
    smithy
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    It could be the recirculion valve on the turbo
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    V70 Graham (Saturday 7th September 2013)
  7. Friday 6th September 2013, 23:29 #5
    Dangerous Dave
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    Possibly the ecu needs to adjust to the quicker reaction of the new TCV as it had adjusted to the characteristics of the old one. May just need a few more miles and it will lose the flutter sound as the ecu smooths the output.
    1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
    1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
    2004 Sapphire Black S60 D5 - The new daily hack.
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    V70 Graham (Saturday 7th September 2013)
  9. Saturday 7th September 2013, 00:20 #6
    Jamest5r
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    Doesn't really matter as Graham won't hit wot again


    T35, 556Nm/410lbft & 361BHP/317WHP
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    cherry1809 (Saturday 7th September 2013),Dangerous Dave (Saturday 7th September 2013),LiamT4 (Saturday 7th September 2013),stribo (Saturday 7th September 2013),V70 Graham (Saturday 7th September 2013)
  11. Saturday 7th September 2013, 09:08 #7
    V70 Graham
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    Quote Originally Posted by Jamest5r View Post
    Doesn't really matter as Graham won't hit wot again
    But if I ever do I take it it's nothing to worry about ?


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  12. Saturday 7th September 2013, 09:37 #8
    Kingsford G
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    Quote Originally Posted by V70 Graham View Post
    But if I ever do I take it it's nothing to worry about ?
    If that happens tell Ann keep flooring,it`s fine.
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    V70 Graham (Saturday 7th September 2013)
  14. Saturday 7th September 2013, 09:39 #9
    V70 Graham
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    Quote Originally Posted by Kingsford G View Post
    If that happens tell Ann keep flooring,it`s fine.
    Any idea what it is though mate ?


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  15. Saturday 7th September 2013, 09:46 #10
    Kingsford G
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    Quote Originally Posted by V70 Graham View Post
    Any idea what it is though mate ?
    It sounds like a RV from the description.As said above just give it a bit ob beens and let the ECU to adapt.If doesn`t work I`d check the RV.
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    V70 Graham (Saturday 7th September 2013)
  17. Saturday 7th September 2013, 09:49 #11
    T5frankie
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    Quote Originally Posted by M-R-P View Post
    oh yes (picky bugger is on his second lol)
    has he re-dyno'd it again yet?
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  18. Saturday 7th September 2013, 09:51 #12
    V70 Graham
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    Quote Originally Posted by T5frankie View Post
    has he re-dyno'd it again yet?
    Not yet, but after yesterday, I feel it's pushing out more than the 257bhp it did last time.


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  19. Saturday 7th September 2013, 09:52 #13
    T5frankie
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    Quote Originally Posted by V70 Graham View Post
    Not yet, but after yesterday, I feel it's pushing out more than the 257bhp it did last time.
    it should be mate you can get 280 out of a 16t, who mapped it?
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  20. Saturday 7th September 2013, 09:53 #14
    V70 Graham
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    Quote Originally Posted by T5frankie View Post
    it should be mate you can get 280 out of a 16t, who mapped it?
    Chad at GRN with a RICA 310


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  21. Saturday 7th September 2013, 10:03 #15
    stribo
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    Still more fettling needed,
    will it never end?
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    You still won't get in the 14s
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  22. Saturday 7th September 2013, 10:06 #16
    T5frankie
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    Quote Originally Posted by V70 Graham View Post
    Chad at GRN with a RICA 310
    did he use his chip from his old ecu from his saffy? you know a 310 is an 18t map right? not that it will make any difference, but he was pushing over 300bhp with an 18t
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  23. Saturday 7th September 2013, 10:10 #17
    V70 Graham
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    Quote Originally Posted by T5frankie View Post
    did he use his chip from his old ecu from his saffy? you know a 310 is an 18t map right? not that it will make any difference, but he was pushing over 300bhp with an 18t
    Not as far as I know mate.


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  24. Saturday 7th September 2013, 10:17 #18
    T5frankie
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    Quote Originally Posted by V70 Graham View Post
    Not as far as I know mate.
    either way you have an 18t map so best get yourself a bigger turbo lol
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  25. Saturday 7th September 2013, 10:20 #19
    stribo
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    Still more fettling needed,
    will it never end?
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    Quote Originally Posted by T5frankie View Post
    either way you have an 18t map so best get yourself a bigger turbo lol
    What's the point, his turbo never spools up anyway.
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  26. Saturday 7th September 2013, 10:21 #20
    T5frankie
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    Quote Originally Posted by stribo View Post
    What's the point, his turbo never spools up anyway.
    he may as well have a 2.0 10valve then lol
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