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Thread: would my car benefit from

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    Regular Member bunsen1's Avatar
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    Default would my car benefit from

    i have a 54 reg 150 cdti sri ,standard, done the air box mod but would any additional cold feed benefit it? extra holes or something, and how and where to put them if yes? cheers

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    Regular Member lizard's Avatar
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    I'd be interesting this one too if anyone can help, seen the VXR done but no other models.....

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    Regular Member daveypower's Avatar
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    not to sure, but an aftermarket airbox filter may alow more are to pass through freely, as for sticking a k&n cone filter beside the engine were all the hot air is is a waste of time, as petrol cars thrive on colder air for better combustion, aslong as your getting a steady flow of cold air then thats plenty. putting extar holes in the air box wouldnt help either as there will be a steady flow of air already in the air box, and the car will only allow as much air as the filter is letting through. hard to explain lol

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    Regular Member bunsen1's Avatar
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    wasnt sure if it would be beneficial or not for a diesel

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    Regular Member bunsen1's Avatar
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    thanks though

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    Regular Member daveypower's Avatar
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    Quote Originally Posted by bunsen1 View Post
    thanks though
    no probs, someone else might have a different experience though.

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    cold air helps diesel just as much as petrol, cold air is more dense and therefore more oxygen rich. Have a look at the front grill where your airbox cold air feeds comes out. On some models the grill is blocked off in front of the cold air feed - you can open this out to improve the flow but you wont notice any difference.

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    Regular Member john_k_sri's Avatar
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    Vehicle : Vectra

    Trim : SRI NAV XP

    Engine : 1.9 CDTI 150

    Year : 2007

    Mileage : 72K

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    Quote Originally Posted by rob 2.2dti View Post
    cold air helps diesel just as much as petrol, cold air is more dense and therefore more oxygen rich. Have a look at the front grill where your airbox cold air feeds comes out. On some models the grill is blocked off in front of the cold air feed - you can open this out to improve the flow but you wont notice any difference.
    Is that because the feed comes from lower down? Someone on here (Big Sig?) recently posted that there was a valid technical reason for blocking off the upper grill on the 1.9 CDTI's. Also I read somewhere that it improves aerodynamics (and lowers emissions?).

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