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Thread: 20+ Psi coasting

  1. #11
    Patrol God
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    I just read this... my boost was doing exactly the same before taming it with the dawes and needle setup after getting the exhaust fitted .
    It was having spasms and best description was a yoyo effect.
    After Mudski helped me set it all up it was so much better to drive smooth boost curve.

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    GUDriver (18th May 2016)

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  4. #12
    Patrol God BigRAWesty's Avatar
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    Quote Originally Posted by trekster View Post
    When I blocked my egr and put 3" exhaust on, without boost control, The ecu couldn't control the boost and if I was just cruising with bugger all foot down the boost would go up to like 25psi+ If I put my foot down there was no problem it would drop back, but couldn't cruise at all.... Might want to check your boost control setup assuming you have a dawes/tilix etc.
    Quote Originally Posted by Hodge View Post
    I just read this... my boost was doing exactly the same before taming it with the dawes and needle setup after getting the exhaust fitted .
    It was having spasms and best description was a yoyo effect.
    After Mudski helped me set it all up it was so much better to drive smooth boost curve.

    Sent from my SM-G920I using Tapatalk
    Still ecu controlled..
    Bugger..
    I was sorta hoping I wouldn't have to go that road..
    I'm actually liking the boost smart boost actuator conversion..
    Might research more..

    Quick Q. Did you guys get the readings off manual gauges or did you notice boost spikes threw scangauge with corrected boost reading?

    I'll swap it to the manifold pressure on the scangauge and see if it's going off chart or if it is just the scangauge miss calculating..
    I can't hear any turbo spool up when is saying 20+ Psi, like I can when I sink the boot in and it hits 15..
    Cheers
    Kallen Westbrook

  5. #13
    Patrol Freak trekster's Avatar
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    For me both, Boost reading on torque would flash at 22psi so it couldn't go any higher, my old turbosmart gauge went to 25 and was off the chart a couple of times lol.
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    BigRAWesty (12th May 2016)

  7. #14
    Patrol God BigRAWesty's Avatar
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    So I've flicked the scangauge to Manifold pressure and it's not as bad as first thought. .
    At 110km/h pressures were between 25 and 33 psi..
    So under full load it was 30..
    So yes still a little over but not double as the corrected boost reading was..

    So..
    I'm thinking current exhaust is still to loud..
    So I'm thinking I'll be putting a cat in the dump pipe........
    That may add the little back pressure needed to control the run away spool..
    If not then I guess I'll need to look at manual controls..
    Cheers
    Kallen Westbrook

  8. #15
    Patrol God Avo's Avatar
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    oh so the car is sticker material....No cat hey...what will the mrs say
    Watch this space, as there maybe a comment added soon

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    BigRAWesty (13th May 2016)

  10. #16
    Patrol God BigRAWesty's Avatar
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    Quote Originally Posted by Avo View Post
    oh so the car is sticker material....No cat hey...what will the mrs say
    It is it is..
    She know..
    She likes the exhaust.. it sings around town..
    Just a touch of a pain on the open road..
    Cheers
    Kallen Westbrook

  11. #17
    The master farter
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    Quote Originally Posted by Avo View Post
    oh so the car is sticker material....No cat hey...what will the mrs say
    Yeah my thoughts too. Nice fine if your caught without a cat too.

  12. #18
    Dribble Master Clunk's Avatar
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    Yeah I've never understood why folk wouldn't put one back in and risk the sizeable fines, just get a hiflow jobbie so they can tell uncle plod. .... look its got one


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    BigRAWesty (2nd June 2016)

  14. #19
    SUCH IS LIFE Maxhead's Avatar
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    Quote Originally Posted by Clunk View Post
    Yeah I've never understood why folk wouldn't put one back in and risk the sizeable fines, just get a hiflow jobbie so they can tell uncle plod. .... look its got one
    Hey it's Westy we're talking about here
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  16. #20
    The master farter
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    Quote Originally Posted by Clunk View Post
    Yeah I've never understood why folk wouldn't put one back in and risk the sizeable fines, just get a hiflow jobbie so they can tell uncle plod. .... look its got one
    Yep I had a high flow metallic filled cat when i had the 3ltr. Seemed pretty good to me. Not sure of the power difference it would have been without the cat but it was one thing i didn't want to risk.
    I got checked twice in the time i had it by the rta. In the same spot too.
    Both times the first thing they looked at was under the car at the exhaust.

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    BigRAWesty (2nd June 2016)

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