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Thread: de-cat............no difference lol

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    Regular Member hairy31's Avatar
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    Default de-cat............no difference lol

    well had a full system fitted to day and removed cat and centre silencer......don;t know why but i must be the only person on here that cant report that it feels faster lol, just my luck

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    Full Member GazVXLINE170's Avatar
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    The ECU needs time to adjust and learn that the engine doesn't need to work hard to move the exhaust gases out. I thought the exact same as you, but trust me - it will be more apparent over a few hundred miles. It's not a massive increase but the engine definitely feels like it can breath easier over the rev range.
    Insignia VX-Line Nav CDTI 170.

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    Regular Member hairy31's Avatar
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    ah..........thank the lord, thought i'd just wasted 400 notes, cheers gaz
    did you notice a better exhaust note with yours,think i need someone to drive mine to see if it sounds any different

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    North West Regional Organiser paulvectrac's Avatar
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    give it time mate mine took a few days when i had my diesel then after that was alot better
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

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    Regular Member hairy31's Avatar
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    nice one cheers paul

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    Full Member GazVXLINE170's Avatar
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    Hairy, diesels done make much noise really - well in the car anyway. I can hear the turbo spool when I accelerate and also hear it spin down when I lift my foot off of the throttle.
    Insignia VX-Line Nav CDTI 170.

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    Regular Member hairy31's Avatar
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    Quote Originally Posted by Gazza4 View Post
    Hairy, diesels done make much noise really - well in the car anyway. I can hear the turbo spool when I accelerate and also hear it spin down when I lift my foot off of the throttle.
    yea i know mate.......was just hoping for a little improvement lol, yea i hear mine spool from about 1700 to about 3000..............then i cant hear it anymore for the ****** tractor engine

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    Full Member GazVXLINE170's Avatar
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    Mine gives a deep rumble between 2,000-3,000rpm - but you still no it's a diesel as the clattery sound is still there.

    The noise will also change, slightly though.

    Did you get a system from the turbo to the back of the car - removing Pre-CAT, CAT, centre silencer and rear silencer(s)? Or was it a cat back system?
    Insignia VX-Line Nav CDTI 170.

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    North West Regional Organiser paulvectrac's Avatar
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    mine was the fulll monty on my vectra
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

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    Regular Member hairy31's Avatar
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    just decat and then straight through to rear boxes.....does the precat make a bigger difference? also blanked egr three days ago....now that made a difference

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