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Thread: SRi-T flatspot - any ideas?

  
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    smitht's Avatar
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    SRi-T flatspot - any ideas?

    I have a slight initial flat spot on my turbo. The present performance setup i have on my SRi-T is the following:
    1) Power pipe
    2) Bailey DV
    3) Viper induction kit
    4) Disabled OE DV
    5) BFO Exhaust system

    Can anyone suggest what could be the cause of this as there is a definate delay on acceleration.
    (Previously owned a SRi-Turbo Phase III.5 running 290bhp 370ibft
    AUDI Sales Executive

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    Dump valve? It's going to introduce turbo lag isn't it?

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    Quote Originally Posted by stevenlcroucher
    Dump valve? It's going to introduce turbo lag isn't it?
    errrmmm NO !

    Tim, the setup above IMO should give no real flatspots. The best thing to do is take bits off one 1 by 1 and see if that cures it !

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    Ive been reading this site a lot the last few days regarding dump valves and this seems to happen to a few people when they disable the OE dump valve. Have a look back via search and type in dump valves, alot of people have had this problem.

    Try setting the OE back on along with the bailey

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    smitht's Avatar
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    I might try reconnectiong the OE DV and see how it runs :?:
    (Previously owned a SRi-Turbo Phase III.5 running 290bhp 370ibft
    AUDI Sales Executive

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    T-bone's Avatar
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    DV ought not to introduce any flat spots or turbo lag - i've never seen that written iirc.

    smitht - as LN say - take the bits off 1 by 1 until you find the source. - When did it start??

    Tbh - I think the most likely cause would be the exhaust - being bigger bore than standard it will all gases through at different rates than you car was previously used to. - so it may take some time for it all to balance out - just an idea!
    Me run tings.... not tings run me!

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    why not ask your ECU for a fault diagnostic. The exaust is a feesable point but you would have to go 5" before it made a real difference anything uoto there will only increas your top end power as making it smaller will increase your bottom end. Another point your turbo does not miss your fuel or electrics do i would hazard a guess at either
    plugs
    leads
    rotor arm
    distributer cap
    if not check your turbo pipes for small wholes the best way is to try and listen for hisses with your after market dump valve blocked off.
    Neil runs a baleys after market dump valve as well as his stander one it works well enough mine however is blanked off so i can run a after market one and my turbp spins up way way quicker than neils

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