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Thread: v6 cdti intercooler?

  1. #1
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    Default v6 cdti intercooler?

    hi. im after more power from my v6. someone told me to get a bigger intercooler? what car could i get one from for my vectra? thanks

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    Full Member Big Sig's Avatar
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    It's the same in yours as in the 2.8t VXR so it's plenty big enough as it is.
    Now I need a turbo to keep up!

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    Regular Member BigWilko's Avatar
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    Vehicle : Signum

    Trim : Design

    Engine : 3.0 CDTI

    Year : 2005

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    Speak to member Harvey Smith. He seems to be a turbo guru. He'll let you know what is what.

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    Regular Member Danwells72's Avatar
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    Vehicle : Vectra

    Trim : Sri

    Engine : 1.9 cdti 150

    Year : 2004

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    with a standard map it wont make much difference. I had a 3" thick intercooler on my dti with a standard map, it looked good and did help a little but i dont think the power gains were much. I relocated it from the middle of the sandwich to the front under the crash bar. had to plumb it all in and buy loads of silicone piping as i couldnt use all the standard pipes as i had moved the intercooler and the inlet/outlet was different position and size

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    Regular Member BigWilko's Avatar
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    Vehicle : Signum

    Trim : Design

    Engine : 3.0 CDTI

    Year : 2005

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    I think the guys that know about turbo's will tell you it's more to do with the air temperature going into the turbo rather than it's size.

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    Regular Member Danwells72's Avatar
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    Vehicle : Vectra

    Trim : Sri

    Engine : 1.9 cdti 150

    Year : 2004

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    agreed, it is about the air temperature, the cooler the air then denser it is, denser air contains more oxygen which makes a bigger bang. A larger intercooler will help with cooling the warm charge air and on the vauxhalls relocating it to the front will remove it from the radiator sandwich further helping cooling

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    I don't know about petrol Vauxhall's or V6 but I have a lot of experience on our 1.9 CDTi and I am the HDi Technical Adviser Europe and Pro Installer for Subaru.
    The first thing is that you need to be able to measure the air charge temperature just before it enter the inlet manifold. The results will indicate whether the existing intercooler is coping.
    I have an ACT guage fitted permanently. Cost £80 posted but there are cheaper options if you can put a few electronic bits together from Maplins etc. There is cheap stuff on E-bay but the leads are 450mm and for the Vectra I guess you need a full meter length on the probe to be of use.
    On our 1.9 the FMIC supplied by Vauxhall was flimsy and thin but worst of all located behind the A/C condenser rad and sandwiched up against the water radiator.
    I fitted a tube and fin Hybrid core intended for a Subaru WRX/STi which is at the front behind the grill, then A/C then radiator. I chose this core because it has the lowest pressure drop of any core I have found so far.
    Previously when the car was standard it was easily possible to have ACTs in the 50s deg C and even 60 C + on WOT fotr more than 10 seconds. Now it is difficult to get ACTs to 30C but this will be a little higher as ambient temps increase as we near the summer.

    I have no idea what the figures are for diesels But on a turbocharged petrol 10 deg C ACT equates to 3% power. This means if your turbo charged petrol is running 50ACT and you can reduce it to 25 C you have justed picked up 7.5% power.
    Reducing ACTs by 20C is often easy to achieve with the right apprach and parts.

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    I don't know about petrol Vauxhall's or V6 but I have a lot of experience on our 1.9 CDTi and I am the HDi Technical Adviser Europe and Pro Installer for Subaru.
    The first thing is that you need to be able to measure the air charge temperature just before it enter the inlet manifold. The results will indicate whether the existing intercooler is coping.
    I have an ACT guage fitted permanently. Cost £80 posted but there are cheaper options if you can put a few electronic bits together from Maplins etc. There is cheap stuff on E-bay but the leads are 450mm and for the Vectra I guess you need a full meter length on the probe to be of use.
    On our 1.9 the FMIC supplied by Vauxhall was flimsy and thin but worst of all located behind the A/C condenser rad and sandwiched up against the water radiator.
    I fitted a tube and fin Hybrid core intended for a Subaru WRX/STi which is at the front behind the grill, then A/C then radiator. I chose this core because it has the lowest pressure drop of any core I have found so far.
    Previously when the car was standard it was easily possible to have ACTs in the 50s deg C and even 60 C + on WOT fotr more than 10 seconds. Now it is difficult to get ACTs to 30C but this will be a little higher as ambient temps increase as we near the summer.

    I have no idea what the figures are for diesels But on a turbocharged petrol 10 deg C ACT equates to 3% power. This means if your turbo charged petrol is running 50ACT and you can reduce it to 25 C you have justed picked up 7.5% power.
    Reducing ACTs by 20C is often easy to achieve with the right apprach and parts.

  9. #9
    Regular Member Ziggy's Avatar
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    Vehicle : Saab

    Trim : 9-3 Vert

    Engine : 2.0

    Year : 2000

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    You are better off looking at water methanol

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    Default

    Can you expand on that please.

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