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Old 05-12-2020, 06:12 PM   #21 (permalink)
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Quote:
Originally Posted by Tahoe_Hybrid View Post
mine has a 4" air dam

the underbody is a mess btw

it looks like it has a wheel splat but it actually does not


Well, that makes sense. They put on a huge airdam because, as you say, the underbody is such a mess.

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Old 05-12-2020, 06:22 PM   #22 (permalink)
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Originally Posted by JulianEdgar View Post
Well, that makes sense. They put on a huge airdam because, as you say, the underbody is such a mess.
quick fix lol
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Old 05-29-2020, 08:21 AM   #23 (permalink)
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anyone still following?

anyway, finally managed to take pictures of the underside

looks rough and needs something, I agree

waiting for mr Edgar's book and a magnehelic gauge to arrive to take some measurements

the cover which I most certainly have to modify is this



the underside is this ; note the 1 = external wastegate pipe
2= intercooler and radiator back end

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Old 05-29-2020, 04:22 PM   #24 (permalink)
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The cover looks pretty good and I'd hope the intercooler and its plumbing would fit under it. But yes, watch out for the external wastegate exhaust!

You'll be able to measure pressures easily enough in the engine bay with just the Magnehelic gauge. But you'll need to make a surface pressure measuring puck and have a reference reservoir to measure the undertray pressures - all in the book.
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Old 05-30-2020, 04:58 PM   #25 (permalink)
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Quote:
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anyone still following? ...
Yes! Still following. Looking forward to your build and your results. You purchased that underside cover? Modifying it won't be difficult. What material are you considering? I made mine with lawn edging like this, from Home Depot:



The reinforced balled end forms the bottom edge of my airdam, and with the bowed curve, attached to the bottom of the bumper cover, there is sufficient resistance to oncoming air for it to hold shape. Among its advantages, it is cheap and it flexes enough when it rubs something that it does not break, crack, or tear off the car. Very durable. Tens of thousands of miles with it now. I posted a pic earlier in this thread (the jack crushing the thing make it look further forward than it is):

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Old 06-02-2020, 02:21 AM   #26 (permalink)
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Quote:
Originally Posted by California98Civic View Post
Yes! Still following. Looking forward to your build and your results. You purchased that underside cover? Modifying it won't be difficult. What material are you considering? I made mine with lawn edging like this, from Home Depot:

I am waiting for the "underbody fixing/attachment kit" to arrive in order to secure it properly

next, I will fit the undertray with some tufts and will mount a go pro camera somewhere to check the flow



I am going to try 1) no air dam 2) "wrc style" front air dam 3) oem position air dam to see if there is any difference, along with the measurements from the magnehelic gauge I think I'll have a pretty good idea of what works and what does not
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Old 06-02-2020, 03:22 AM   #27 (permalink)
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Sounds a good plan.
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Old 06-02-2020, 03:30 AM   #28 (permalink)
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Interesting topic. It convinces me to look at my own car, a model similar to the Polo & Golf Bluemotion.



completely closed undertray



'airdam' is remarkably small



What I have never noticed are the openings towards the wheels. Purpose? Cooling?
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Old 06-02-2020, 03:32 AM   #29 (permalink)
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Quote:
Originally Posted by GreenTDI View Post
Interesting topic. It convinces me to look at my own car, a model similar to the Polo & Golf Bluemotion.



completely closed undertray



'airdam' is remarkably small



What I have never noticed are the openings towards the wheels. Purpose? Cooling?
Probably need a pic to be able to comment.
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Old 06-02-2020, 03:34 AM   #30 (permalink)
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Quote:
Originally Posted by JulianEdgar View Post
Probably need a pic to be able to comment.
Have I done, are they not visible?

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