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  1. #1
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    Mapped C30 T5 issue

    Hello all,

    So I had my c30 mapped over a year ago now and have had an issue with it since day one. During quick WOT gear changes, when going to the next gear and applying throttle I'm getting very little boost. If I change gear slowly or quickly but close to the limiter I don't get this problem. If I get no boost I can quickly lift and go back to WOT and it boosts as normal. If I rev to say 4-5k and have max boost and change there is very little boost and acceleration.

    I contacted the place where I had it mapped who informed me it was an ongoing problem (why they didn't tell me this before I don't know) and that they would have a fix for it soon. Long story short I've sent numerous emails and made several telephone calls, been down and had the map updated and still the problem persisted. After a few months of being ignored I managed to get back in touch with them and was told to keep checking their Facebook page to find out when the fix is posted. It's been nearly a year and a half now and I've still not heard anything so I've given up trying to deal with them... The customer service leaves a lot to be desired! At the time of having the map "updated" there was another c30 there with the same issues. The company is well rated in terms of volvo remapping and I've had no luck finding any solutions from them or on any forums.

    Apart from this issue I have no other problems. The car revs smoothly there's no hiccups or misfires, it comes into boost fine exactly when it should and holds well.

    Any turbo wizards on here know what could be causing this??

    Specs engine wise are as follows:

    K&N typhoon Air filter w/ hard pipes
    Do88 intercooler w/ hardpipes
    AS performance alloy inlet plenum
    Ported/polished inlet manifold
    Forge recirc valve (stock kit spring)
    Forge actuator (stock kit valve)
    Elevate TCV
    Ferrita 3" downpipe w/ 100 cell race cat
    Jetex cat back
    312bhp 495Nm of torque
    Boost is running 1.2 bar peak (3k rpm) and drops to around 0.8 bar at the limiter
    The car has done around 46k miles

    This is the only turbo car I've owned so I don't have a lot of experience with them. The only things I can possibly think of are maybe recirc/actuator issues. I have stronger springs for both that should really be installed (I'll be doing this Saturday to see if it magically fixes it) but again building and holding boost is absolutely fine. Maybe the actuator isn't closing quick enough on gear changes because of the weak spring pressure??

    I barely drive it anymore hence the reason it's not been sorted sooner but I'm wanting to sell my car soonish in favour of some Jap 4wd so any help would be greatly appreciated!

    Elliot.

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    kmb (Thursday 6th December 2018)

  3. #2
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    Can't help on the problem unfortunately, but was wondering if the block was shimmed as you're making a good lump of extra power?

    Also what year of C30 T5 it is (I've got a 2010 one)?

  4. #3
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    Quote Originally Posted by kmb View Post
    Can't help on the problem unfortunately, but was wondering if the block was shimmed as you're making a good lump of extra power?

    Also what year of C30 T5 it is (I've got a 2010 one)?
    It's a 2008 (B5254T7). Getting around 300bhp seems to be fairly easy with the usual stuff. I'd definitely recommended checking out the inlet plenum and manifold from AS performance though. Not too expensive and definitely gives it that extra edge. The block isn't shimmed and I wouldn't bother doing it until the engine gets a few more miles on it tbh. If you've got the money and live close to somewhere that does such a thing then I guess it's worth doing for peace of mind. Never heard of a T5 cracking a liner tbf but ive heard of a few cases on the Ford St engine's which is strange. I'm no expert but from what I know it's caused by air bubbles in the small spaces between each liner due to the floating deck design. So aslong as your using decent coolant (waterless is probably the best option) then I don't think you'll have any problems unless your thrashing it all the time and not letting it warm up/down etc.

  5. The Following User Says Thank You to Egc30t5 For This Useful Post:

    kmb (Thursday 6th December 2018)


 

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