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Thread: Turbo port and flapper mod

  1. 29th October 2017, 12:42 AM #1
    TOMMY J Guest

    Turbo port and flapper mod

    Hi guys, I know there is a lot of info on turbo's in here, but couldn't find an answer to my question...

    Has anyone done a port and flapper mod on the standard turbo for the D2's?

    I'm coming out of a turbo Barra (Ford DOHC, inline 6cyl motor) phase and one of the simplest things to do in order to get extra power out of a Barra motor was injectors, bigger IC, bigger dump and a port and flapper mod on the Garrett GT3582R. These mods followed by a dyno tune gives amazing results.

    From all the reading I've done, a 3" exhaust will help with breathing. But, I'm just wondering if anyone has done a simple port and flapper mod on the standard turbo for the td5? If so, what were the results like?

    Looking forward to hearing back from anyone who has done this mod.

    Cheers,

    Tommy J
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  2. 29th October 2017, 09:30 AM #2
    discorevy
    discorevy is offline ChatterBox Subscriber
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    Hi Tommy
    your mod is not needed on diesels , I thought that mod was to prevent big spikes in the petrols and to avoid overboost, which in a petrol can chernobyl , if a diesel runs lean no big deal
    I reckon you will be wanting to mod the td5 as it needs it in its standard form and if you're going down that road you can ( if done properly) expect a safe 40 percent increase in power and torque with lots of mods, however most are happy with 20 - 25 percent and the td5 is one of the great engines IMO but it won't put out the same power as a barra although it is capable of gobs of torque
    welcome
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  3. 29th October 2017, 09:41 AM #3
    PhilipA
    PhilipA is offline Swaggie Subscriber
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    Yes I was thinking the same thing.
    It wouldn't increase boost, just ensure that the boost doesn't overpower the wastegate when the engine is modified and cause a spike.
    My son has had 2xFord turbos, one of which was a Typhoon which would pull 10s when it got traction and the auto allowed it to spool.

    Regards Philip a
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  4. 3rd November 2017, 09:02 PM #4
    twr7cx
    twr7cx is offline YarnMaster Supporter
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    Having also had a BA XR6T with 323rwkw on standard motor and turbo I've familiar with what your asking.

    You need to understand the drastic differences between turbo diesel and petrol motors. Diesels have the advantage of being happy and safe running lean. This is why you can run a VGT (AKA VNT). With the VNT my TD5 is at 10psi straight off idle and 22psi before 1,700rpm. When rolling down a hill off the accelerator the VGT will still be pushing 6psi into the motor. It's a whole different game to a petrol motor which would have been cooked under such conditions.

    As for 3" exhaust. Your wasting your money. The standard 2.5" is perfectly fine in it's size, just replace the cans with high flow units. The only off the shelf turbo for the TD5 that I am aware of that benefits from a 3" system is the TurboTechnics 220 and these are very very uncommon as they'e got some negatives for street use compared to their slightly smaller one.
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