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Old 10-03-2015, 05:45 PM   #31 (permalink)
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Fascia plugs

Sorry for not updating this thread for a few weeks as I have been very occupied with personal and work-related matters.

Updates !

Below is the intended front bumper fascia redesign. I do not know if the current design poses a problem, but I figured I might at least create the foam plugs for now, given that it was still warm enough outside to make it happen.



Here are the foam plugs :








I also experimented with clay, in the hopes that it would be easier to make a mold out of it, but it turned out to be a difficult medium to work with since it was developing cracks during the drying process. But here it is anyways :





The goal here is to make the lower front bumper smooth and flush.

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Last edited by CigaR007; 10-03-2015 at 09:07 PM..
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Old 10-03-2015, 07:07 PM   #32 (permalink)
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It looks like you used 4mil polyethylene as a mold release. Correct?
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Old 10-03-2015, 07:24 PM   #33 (permalink)
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I'm curious to see if you can produce any tangible improvement by smoothing this area. I'm running low on easy pickings and closing up the exhaust tunnel on my belly pan is looking daunting at the moment.
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Old 10-03-2015, 07:42 PM   #34 (permalink)
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Quote:
Originally Posted by freebeard
It looks like you used 4mil polyethylene as a mold release. Correct?
No mold release here. Plastic wrap was used to protect the car's plastic trim and the 2-part foam was poured into the bumper cavity. Next step would be to trim any excess foam (or add foam if needed) and apply the fibreglass/epoxy resin coatings.


Quote:
Originally Posted by kafer65
I'm curious to see if you can produce any tangible improvement by smoothing this area.
I asked myself the same thing but given that every little detail adds up, it might be beneficial when coupled with the other mods.
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Old 10-04-2015, 10:15 AM   #35 (permalink)
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The CRZs fuel logs parallel my own except they are about 10% better give or take so I figure at our mileage resolution there may be some gain here. If we were getting 20 mpg we wouldn't see any I think. .

IF you look you can see where the dirt path that was pushed by the air
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Old 10-04-2015, 12:04 PM   #36 (permalink)
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I always thought the lower front bumper recesses were there to create turbulence to "jump" or bypass the drag created by the open front wheel well.
Kinda like canards, in the right place reducing drag of the wheel well.
Do you have the undertray under the engine bay? It looks like the same philosophy is used there...
It's interesting the entire philosophy of the car.
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Old 10-08-2015, 05:17 PM   #37 (permalink)
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Low speed fan . On 98degrees c off 96 deg c.
that low speed fan is extremely quiet! I had to hold my hand in front of the grill to feel it coming on!
Just fyi
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Old 10-10-2015, 01:50 PM   #38 (permalink)
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Quote:
Originally Posted by vibrating_cake View Post
I always thought the lower front bumper recesses were there to create turbulence to "jump" or bypass the drag created by the open front wheel well.

Kinda like canards, in the right place reducing drag of the wheel well.
Good question. I guess some tuft testing might reveal what is truly going on.
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Old 10-10-2015, 02:24 PM   #39 (permalink)
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To the extent that the vent is at an angle to the flow you might get some turbulence bleeding off the trailing edge. A cavity facing forward will have a pocket of recirculating air.

See BMW's air curtain:


http://ecomodder.com/forum/showthrea...tml#post239013

That's a ten page thread from 2011. And here is a genuine BMW part for the left side for $16.95.

Genuine BMW Air Duct 'Air Curtain' Left - 51118068901 - Turner Motorsport
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Old 05-19-2018, 06:49 PM   #40 (permalink)
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I am curious about the CRZ,

There are a couple of them on our local craigslist equivalent.

How easy is it to tune the electric motor / system ? Say I managed to double the capacity of the battery can i use it on demand? And say i found means of charging the battery at home, can i use it to depletion coming home and charge it there?

And the bms, is it easy to reverse engineer? I have been following Robert Murray-Smith on youtube. Building a several kw battery and putting that in the car so there is always full electric assist would be an interesting project.

Are these relatively easy to configure or would i be pulling my hair out.

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