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Thread: 3.5k-4k revs

  
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    3.5k-4k revs

    i get a bit of a flat spot around these revs in 2nd n 3rd

    anyone else?

    on a 1.8 coupe 02 plate (not sure what engine code as i get confused with all the x220clet etc etc lol)
    http://jaymesd.fotki.com/ - ASW VOL - The Gentlemans Car Driver

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    im always looking at the road when i put my foot down...not at the rev-meter

    ...personally i think the 1.8 revs quite smoothly in standard form...if your having problems perhaps a remap is on the cards? have you derestricted/veccy C'd your intake?

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    well i have 2 eyes, so one on road, one on revs lol

    its totally standard mine, bout 2months ago i changed oil n spark plugs

    what you mean derestricted? and whats this vecca c pipe i hear about?
    http://jaymesd.fotki.com/ - ASW VOL - The Gentlemans Car Driver

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    do a search for veccy c - or look in the how to's in the tech section - all the info is there regarding the upgrade. How about giving the throttle body a good clean. Obviously I guess yours is the Z18XE therefore it doesnt have an ICV or an EGR so u can only clean the T/B and hope for the best!
    This reply is probs way off - but just a suggestion - I'd defo give the TB a clean (with carb cleaner or similar) before going down the route mentioned above.

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    Quote Originally Posted by jaymes
    well i have 2 eyes, so one on road, one on revs lol
    ahhh...i forgot to mention i'm a cyclopse

    t'is worth derestricting the airbox and adding a veccy C pipe either way...will improve throttle response and maybe smooth some of your flat spots...have a look in the how-tos in the technical section

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    Quote Originally Posted by GeordieBandit
    Obviously I guess yours is the Z18XE
    i dont have a clue lol (nods and smiles)

    will give my TB a clean then me thinks

    what does derestricting airbox invovle?
    http://jaymesd.fotki.com/ - ASW VOL - The Gentlemans Car Driver

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    undoing a few clips...yanking out the airbox...opening it up...swapping to a k&n panel filter in the process...then take out the 2 "restrictive tubes" inside the box...these reduce airflow...and put it all back together again

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    An '02 Astra 1.8 has the Z18XE engine. Both this engine and it's predecessor X18XE1 are fitted with "variable intake manifold" which makes the intake longer up to 3.5/4.0 and shorter above 3.5/4.0. It's operated by a set of flaps these might be sticking.

    A fault on these flaps will eventually show up a diagnostic code but it may not be severe enough for that.

    Run the engine with the ducting removed from the throttle body and gently spray carb cleaner in. This'll help to remove any oily / carbon deposits in the intake tract. Be patient, spraying too much just cause the engine to stall.
    Maintains:- Vectra Design 1.9CDTi
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    nope, no flat spot here... nothing showed up on the last dyno i had done either.
    My car - Rusty Custom Creations Inc....

    The only natural pilots are born with feathers.... except me.

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    mine used to have that, viper and jetex cat back exhaust sorted it out though..
    Been apart of the inner circle since 2001
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