CF Mohawk Scoop without roof panels - Page 3 - LotusTalk - The Lotus Cars Community
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post #41 of 79 (permalink) Old 10-11-2018, 04:32 PM Thread Starter
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I wouldn't call it a study, but i did take some measurement, i wanted to go further but had no occasions yet, plus i'm waiting for winter temps to come.
Btw here it is, i'd really like to know your friend thougts.

https://www.lotustalk.com/forums/f15...18/index2.html

And this is what i'd like to realize

Very interesting difference between having the roof on and off in respect to where the high-pressure area appears to occur in front and atop the windscreen.

I like your design suggestion to move the scoop forward of the windscreen so as to not having to make the scoop too large or too tall to take advantage of this high-pressure area.
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post #42 of 79 (permalink) Old 10-11-2018, 05:58 PM
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Anything is possible, I'll need a donor hood for the mold fabrication process for at least a month, and money to cover the cost to make the mold and for each individual hood that will be made from this mold.
how much will this be?
where r u located?
thanks

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post #43 of 79 (permalink) Old 10-12-2018, 02:09 AM
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Very interesting difference between having the roof on and off in respect to where the high-pressure area appears to occur in front and atop the windscreen.

I like your design suggestion to move the scoop forward of the windscreen so as to not having to make the scoop too large or too tall to take advantage of this high-pressure area.
Hi pressure, clean flow and no warm air from radiators, that could mean the end of struggling for IATs
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post #44 of 79 (permalink) Old 10-12-2018, 06:00 AM Thread Starter
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how much will this be?
where r u located?
thanks
I'm mostly in Socal but currently on Oahu.

Please take some pictures of your hood form the top, side, and bottom views as perpendicular to the planar surface as possible, I'll get some numbers for you.
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post #45 of 79 (permalink) Old 10-15-2018, 07:43 AM Thread Starter
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Here are the latest fitting and re-indexing of the test FG plug to ensure exact fitment of the top - looks awful, but it's sausage making.
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post #46 of 79 (permalink) Old 10-20-2018, 12:25 PM Thread Starter
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Working on the shape of the new scoop, my friend has used foam to replicate the overall contours of the OEM scoop. He has outlined the shape of the new scoop, which will be about 2" taller and about 4" forward of the windshield to take advantage of the high-pressure area shown by the wind tunnel video.

We are going for a Porsche GT1 and Mercedes Project 1 shape in an attempt to make Colin Chapman smile, and Gordon Murray envious.
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post #47 of 79 (permalink) Old 10-20-2018, 12:47 PM Thread Starter
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Final shape, any comments?
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post #48 of 79 (permalink) Old 10-23-2018, 03:09 PM
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Wow, looking real good! Nice combination of both style roofs. Looking forward to the final piece.

2007 Lotus Exige S - Aspen White
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post #49 of 79 (permalink) Old 11-03-2018, 07:16 AM Thread Starter
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Here are some more pictures to show the latest progress of my project. The new top is finalized and being finished this weekend.
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post #50 of 79 (permalink) Old 11-04-2018, 07:28 AM Thread Starter
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Here are some pictures from yesterday, I have some pricing for those who are interested in this top in CF or FG.
I learned that the stock Mohawk scoop and roof cavity is a shared volume, the ones I'll make will not, so there will be a real ram effect.
This top in complete CF and epoxy resin (factory uses polyester resin) will weight about 6 lbs and cost $4250
This top in FG and polyester will be $1750, either single (w/o headliner) or double skin (with headliner).
Shipping will be the actual cost to CONUS.
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post #51 of 79 (permalink) Old 11-06-2018, 05:15 PM
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looking cool!
Would like to see a side shot or profile shot with a bit of the car to see how it slows is possible.

Also will the intake hole be with mesh cover?
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post #52 of 79 (permalink) Old 11-06-2018, 06:57 PM Thread Starter
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The mesh does very little unless you're following a gravel truck too closely or if you drive through a flock of starlings because the mounting flange for the wire grill will reduce the scoop opening.
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post #53 of 79 (permalink) Old 12-08-2018, 05:54 AM
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Hello, first of all I am wondering roughly where you guys live? I'm looking to find someone to consider custom work on my Evora. But just discussing this post, I want to add a mohawk roof scoop to my Evora and blend it into the roof before paint. l know it goes against everything an Evora owner should ever think of doing lol, but I'm going for a specific look. I'll be first to admit the car drives to the grocery store and my work. I'm going for form over function, I'll just be honest. I'm wondering specs on this to see if it would span the width of the recessed middle section of the Evora roof and also how far back it would go. Thank you, please feel free to email me at [email protected] if that works. Thanks!!!
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post #54 of 79 (permalink) Old 12-08-2018, 09:03 AM Thread Starter
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Hello, first of all I am wondering roughly where you guys live? I'm looking to find someone to consider custom work on my Evora. But just discussing this post, I want to add a mohawk roof scoop to my Evora and blend it into the roof before paint. l know it goes against everything an Evora owner should ever think of doing lol, but I'm going for a specific look. I'll be first to admit the car drives to the grocery store and my work. I'm going for form over function, I'll just be honest. I'm wondering specs on this to see if it would span the width of the recessed middle section of the Evora roof and also how far back it would go. Thank you, please feel free to email me at [email protected] if that works. Thanks!!!
Hi Dustin, I've sent you an email regarding the above.
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post #55 of 79 (permalink) Old 12-15-2018, 08:47 AM
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senna’s daddy - tried to send you a PM but it says your inbox is full

Also, your screen name is a pain to tag in this forum...

Last edited by LostPawn; 12-15-2018 at 09:57 AM.
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post #56 of 79 (permalink) Old 12-29-2018, 09:11 PM
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This is some great work! how do I subscribe?
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post #57 of 79 (permalink) Old 12-30-2018, 10:49 AM Thread Starter
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senna’s daddy - tried to send you a PM but it says your inbox is full

Also, your screen name is a pain to tag in this forum...
I'm sorry, my username used to be Senna's dad, but had to change it when the site changed security. PM me for my email if you wish.
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post #58 of 79 (permalink) Old 12-30-2018, 10:56 AM Thread Starter
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This is some great work! how do I subscribe?
Thank you, here are the latest pics:

1. The final mold has been made in structural fiberglass (red).

2. Prototype top in polished grey primer.
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post #59 of 79 (permalink) Old 12-31-2018, 08:11 AM
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Awesome Progress. Can't wait to see how that new scoop will look all finished and on the car. I know the performance is superior, just not sure the look has grown on me enough.

2010 Lotus Exige S240
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post #60 of 79 (permalink) Old 12-31-2018, 09:25 AM Thread Starter
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Awesome Progress. Can't wait to see how that new scoop will look all finished and on the car. I know the performance is superior, just not sure the look has grown on me enough.
Thanks; I didn't want to change the established Exige scoop design, so the shape, and size of the scoop are the same as the stock but just a couple of inches higher and forward to make better use of the Exige's aerodynamics.

I was inspired by Adrian Newey's GT3 roof scoop.
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