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Your thoughts on the enormous new hole in my bumper.

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Old 12-14-2007, 10:47 AM
  #21  
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Originally Posted by Ben
maybe that grinder/autokonexion guy would be willing to make a miata bumper shaped drop-in ducted vent. that is, in the unlikey chance he's actually willing to listen to the market.
look, he made a hood for an NSX, he knows what he's doing, ok?!?! Maybe you should show a little more respect and just buy his product without questioning him. Do not disrespect a potential sponsor.
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Old 12-14-2007, 11:03 AM
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Me thinks that each car and install is different enough to justify a "try and see if it works" approach. There are various ways to resolve each issue too. I have a big *** radiator and fan which seem to manage my coolant temps quite well in the SE summer heat, in traffic (sans a/c).

Below is an image showing my plans to restructure the interior of the mouth. The top section may be wishful thinking, but the bottom is absolutely feasible. In my case I've got a larger radiator, but even the stock radiator could be lowered some to provide direct exposure to oncoming air by dropping the lower part of the mouth shrouding as pictured.



I agree- that hole just needs an insert with a finished edge
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Old 12-14-2007, 11:26 AM
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so should I consider that no air going through the intercooler is going to contribute to cooling the radiator from loosing flow and heating the air through the intercooler?
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Old 12-14-2007, 12:22 PM
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you left out the air directors / straighteners / unstraighteners rob
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Old 12-14-2007, 01:46 PM
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Originally Posted by Ben
hole saw and jig saw? I've been trying to sack up and do this myself.
just clean up the white edge, then go after the hood situation.
Rotozip all the way, baby. I should have gone a lot slower, and I can still go back and clean up the edges quite a bit. I do have some touch-up paint, but I was also thinking about some black trim around the edges just to clean up the close-up aesthetics a little bit. I used a LOT of painters tape, a tape measure referenced off the top edge of the bumper to get the curvature right, and the cap from a bottle of kitty litter to get the curves at the ends.

I am also going to do a vented hood eventually, but you can see the oil cooler on the left in the photo. Vented hoods are great for getting air through whatever fits in the stock opening, but the oil cooler was going to have to go in the fenderwell, where it would be destroyed by road debris, or behind the intercooler, further sacrificing the current airflow situation. I agree the car is a lot cleaner without the hole, but I think it's growing on me. It's definitely more race-car than street car at this point anyway.
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Old 12-14-2007, 01:48 PM
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Stacking exchangers works best when you have the hottest exchanger last to reach the passing air. So your boost air in the IC is going to be the "least hot", then the rad which will benefit because the passing air is still not as hot as the surface of the rad rows/fins.

The top won't work- not with the angle that steep. Another reason to build that bolted on front support so that it goes deeper into the bumper. I think that'd make a BIG difference in air movement into the mouth and through the exchangers.

If the support was moved deeper into the nose/bumper, then I think the contours would come closer to mirroring each other as the expand into the mouth.


y8s I am awaiting your drawings
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Old 12-14-2007, 02:11 PM
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christ... if u want function over looks.... JUST RIP THE WHOLE BUMPER OFF!
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Old 12-14-2007, 02:17 PM
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I'm cutting a hole like the m3csl in the bottom of the bumper for my oil cooler. I can live with that.
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Old 12-14-2007, 02:25 PM
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Hustler, link?

I think it looks just fine. Once the edge is cleaned up it should be pretty badass. I like things like that.
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Old 12-14-2007, 02:27 PM
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Originally Posted by cjernigan
Hustler, link?

I think it looks just fine. Once the edge is cleaned up it should be pretty badass. I like things like that.


hole saw + this
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Old 12-14-2007, 02:54 PM
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also, has anyone here used the bell air scooper? I'm going to get that **** on the car as soon as I get home to work on it again. It would be really cool if that worked...and I don't rip it off on my first trip to the track.
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Old 12-14-2007, 03:31 PM
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I'm using it, and it's a great piece, but it does hang a bit low and you have to watch the curb 'stoppers' in parking lot spaces, and some stupidly high speed bumps.
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Old 12-14-2007, 03:33 PM
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Originally Posted by FoundSoul
I'm using it, and it's a great piece, but it does hang a bit low and you have to watch the curb 'stoppers' in parking lot spaces, and some stupidly high speed bumps.
have you used it on the track in a turbo car? I have one to go under my r-pack spoiler. Its going to be stupid low.

I didn't know you drove a turbo miata...cool.
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Old 12-14-2007, 03:58 PM
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Originally Posted by hustler
have you used it on the track in a turbo car? I have one to go under my r-pack spoiler. Its going to be stupid low.

I didn't know you drove a turbo miata...cool.
Him and Ben are in competition for the fastest 1.6 turbo in the county.
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Old 12-14-2007, 04:28 PM
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I'd have a Bell scooper, or something like it, but then I heard it hangs BELOW the R-package lip. My lip is under 4" from the ground. A meaningful scooper would reduce that to sub-3", which is just absurd.

Myron (2/3rdsCobra @ M.net) has done this really trick setup that's like a BEGi scooper, but he cut a slot in the R-package lip. The duct goes right under the IC into the rad.
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Old 12-14-2007, 05:23 PM
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I understand that I want to pull air through the radiator, but what about the intercooler? I remember some discussion that turbulent air is best for an intercooler (which doesn't make sense in respect to radiator cooling) so would it be best to seal off my intercooler inside the sealed radiator air track? I'm thinking about building a rad box like matt andrew's car, with a seperate foil for air to the rad, and not the intercooler.
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Old 12-14-2007, 06:27 PM
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I wonder if sealing off this area alone would do the trick. I have a really ******* big intercooler (begi #3), so I don't have much room to work with for ducting.
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Old 12-14-2007, 06:32 PM
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Hustler, is that your car? Is that the way it sits now?
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Old 12-14-2007, 06:35 PM
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Originally Posted by soflarick
Hustler, is that your car? Is that the way it sits now?
not my car (still travelling for work). My **** sits like that, with the same front to rear dimensions and spacing, but a much larger width and height intercooler.
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Old 12-14-2007, 07:13 PM
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Originally Posted by Ben
maybe that grinder/autokonexion guy would be willing to make a miata bumper shaped drop-in ducted vent. that is, in the unlikey chance he's actually willing to listen to the market.
he makes products if he thinks people will buy them. Id put money that if 10 people on here said theyd buy one hed make em.
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