Carbon fiber Exige Cup roof - Page 7 - LotusTalk

usurbrain · 05-23-2009, 04:44 AM

I wouldn't mind paying that if it made the mailslot bigger and increased airflow to the intercooler... but I'm not sure that it does anything different than a stock roof.

Thomasio · 05-23-2009, 06:28 AM

Quote:

Originally Posted by usurbrain

I wouldn't mind paying that if it made the mailslot bigger and increased airflow to the intercooler... but I'm not sure that it does anything different than a stock roof.

Is is a bigger intake, and it is repositioned to a high pressure area.

The "forum wisdom" that the narrowest point of the intake tract prevents any extra airflow is, well, forum wisdom... and it is wrong.

usurbrain · 05-23-2009, 07:53 AM

So you're telling me that this is bigger than the stock S240 roof? I don't see a difference. The bottleneck is where the roof meets the clam. I still don't believe a little mail slot like that can be enough to cool the intercooler, especially if you raise the boost in the car.

Composites · 05-26-2009, 02:51 PM

We still make them, new lower price: $2800.00 plus shipping.

usurbrain · 05-26-2009, 04:30 PM

How does this differ from a S240, cup car, s260 roof? Is the internal diameter bigger at all? I understand that squeezing down the area to the mail slot from the front scoop area will accelerate the velocity of the air, but.... only so much can flow through that mail slot.... Can you create something that will be like the S1 that you produced that will allow more air to the intercooler?

shay2nak · 05-26-2009, 09:37 PM

Quote:

Originally Posted by usurbrain

How does this differ from a S240, cup car, s260 roof? Is the internal diameter bigger at all? I understand that squeezing down the area to the mail slot from the front scoop area will accelerate the velocity of the air, but.... only so much can flow through that mail slot.... Can you create something that will be like the S1 that you produced that will allow more air to the intercooler?

Exige full width roof intake

usurbrain · 05-26-2009, 10:59 PM

Quote:

Originally Posted by shay2nak

Exige full width roof intake

Exactly.. I should have read that fully before I commented on this thread... When Mike says that it will cost a lot... what's a lot?

Drmike · 05-27-2009, 08:36 PM

Quote:

Originally Posted by Thomasio

The "forum wisdom" that the narrowest point of the intake tract prevents any extra airflow is, well, forum wisdom... and it is wrong.

finally someone who gets it!

usurbrain · 05-27-2009, 09:56 PM

Quote:

Originally Posted by Drmike

finally someone who gets it!

So you are telling me that a 2" tube will flow similar air as a 4" tube? Even under slight pressure, there should always be more air that flows through the 4" tube....

Composites · 05-28-2009, 08:57 AM

Quote:

Originally Posted by usurbrain

How does this differ from a S240, cup car, s260 roof? Is the internal diameter bigger at all? I understand that squeezing down the area to the mail slot from the front scoop area will accelerate the velocity of the air, but.... only so much can flow through that mail slot.... Can you create something that will be like the S1 that you produced that will allow more air to the intercooler?

I'm concerned about a bigger opening creating lift.

usurbrain · 05-29-2009, 07:16 AM

Quote:

Originally Posted by Composites

I'm concerned about a bigger opening creating lift.

Thanks Mike. I agree, a bigger opening will probably create more lift. I'm not as worried about that because I would like more air to get to the intercooler. In the S1 design the width of the scoop is the same all the way back. How difficult would that be to make?

I'm presuming by no one commenting that this current top is exact the same as a S240 roof. Just in CF.

Hsin

JGriffin · 06-10-2009, 12:33 PM

Here is a concept to consider. Could someone produce a CF roof, hatch, and intercooler shroud that are meant to go together that produces an additional air path above and around the mailslot to get air to the intercooler. In the roof the air would split into 2 paths, one that goes through the mailslot and into the shroud and one that goes above and around the mailslot and into extra openings in the shroud. There could be problems getting the hatch to open easily, but it seems solvable. I know it wouldn't be cheap but it should be doable

Thomasio · 06-10-2009, 12:38 PM

Quote:

Originally Posted by JGriffin

Here is a concept to consider. Could someone produce a CF roof, hatch, and intercooler shroud that are meant to go together that produces an additional air path above and around the mailslot to get air to the intercooler. In the roof the air would split into 2 paths, one that goes through the mailslot and into the shroud and one that goes above and around the mailslot and into extra openings in the shroud. There could be problems getting the hatch to open easily, but it seems solvable. I know it wouldn't be cheap but it should be doable

Already done... photos and announcement coming soon. "tesprit" has seen it...

You can use your stock Cup roof (or CF Cup roof). Air is ducted out of the roof scoop and thru the interior. Uses the RLS CF window (with precut holes) to route the air into the intercooler.

The cross sectional area of flow is more than doubled.

(The RLS CF window was made for this!)

P.S. it does not interfere with the hatch at all. Everything is done with the stock ducting in place (but modified).

JGriffin · 06-10-2009, 12:46 PM

thats an even better idea! I look forward to seeing it

Thomasio · 06-10-2009, 12:56 PM

Here is a quick photo. The duct shown is pre-production. Two 3" hoses that go to the roof scoop are also not shown.

usurbrain · 06-10-2009, 12:57 PM

Definitely sounds better... looking forward to this.

Quote:

Originally Posted by Thomasio

Already done... photos and announcement coming soon. "tesprit" has seen it...

You can use your stock Cup roof (or CF Cup roof). Air is ducted out of the roof scoop and thru the interior. Uses the RLS CF window (with precut holes) to route the air into the intercooler.

The cross sectional area of flow is more than doubled.

(The RLS CF window was made for this!)

P.S. it does not interfere with the hatch at all. Everything is done with the stock ducting in place (but modified).

Thomasio · 06-10-2009, 12:59 PM

P.S. The people who already have the RLS CF Window can easily cut the two holes if they want to upgrade their intercooler airflow. PM me for details. All RLS CF Windows can be ordered with the duct holes or without them.

Thomasio · 06-11-2009, 07:23 PM

Photo of the complete assembly (pre-production).

ZJChaser · 06-11-2009, 07:52 PM

looks familiar. These setups so far have been proving to work well. I know of at least 3 other cars with ducting like this. They have everyting from 1 to 3 ducts.

shay2nak · 06-11-2009, 10:37 PM

what sort of IATs do these guys see? The setup looks a bit intrusive plus I like having a glass window back there, so I might be stuck. Unless I get a plexiglass replacement???

05-23-2009, 04:44 AM	#121 (permalink)
usurbrain Registered User Join Date: Aug 2005 Location: Sunnyvale, CA Posts: 314	I wouldn't mind paying that if it made the mailslot bigger and increased airflow to the intercooler... but I'm not sure that it does anything different than a stock roof. __________________ 2008 Exige S240 Storm Titanium, Touring Package, Starshield, Cup Car wheels with R888, Arqray Twin muffler, Cup Car airbox, Nitron Double Adjustable suspension, Saikou Michi catch cans, Bride seat, HID headlights, Lots of track parts...

05-23-2009, 07:53 AM	#123 (permalink)
usurbrain Registered User Join Date: Aug 2005 Location: Sunnyvale, CA Posts: 314	So you're telling me that this is bigger than the stock S240 roof? I don't see a difference. The bottleneck is where the roof meets the clam. I still don't believe a little mail slot like that can be enough to cool the intercooler, especially if you raise the boost in the car. __________________ 2008 Exige S240 Storm Titanium, Touring Package, Starshield, Cup Car wheels with R888, Arqray Twin muffler, Cup Car airbox, Nitron Double Adjustable suspension, Saikou Michi catch cans, Bride seat, HID headlights, Lots of track parts...

05-26-2009, 02:51 PM	#124 (permalink)
Composites Carbon Guru Join Date: Nov 2006 Location: Glendale, WI USA Posts: 239	We still make them, new lower price: $2800.00 plus shipping. __________________ Mike Cudahy President Prototype Composites (414) 354-5144

05-26-2009, 04:30 PM	#125 (permalink)
usurbrain Registered User Join Date: Aug 2005 Location: Sunnyvale, CA Posts: 314	How does this differ from a S240, cup car, s260 roof? Is the internal diameter bigger at all? I understand that squeezing down the area to the mail slot from the front scoop area will accelerate the velocity of the air, but.... only so much can flow through that mail slot.... Can you create something that will be like the S1 that you produced that will allow more air to the intercooler? __________________ 2008 Exige S240 Storm Titanium, Touring Package, Starshield, Cup Car wheels with R888, Arqray Twin muffler, Cup Car airbox, Nitron Double Adjustable suspension, Saikou Michi catch cans, Bride seat, HID headlights, Lots of track parts...

06-10-2009, 12:33 PM	#132 (permalink)
JGriffin Registered User Join Date: Nov 2008 Location: Ontario, Canada Posts: 5	increased airflow concept Here is a concept to consider. Could someone produce a CF roof, hatch, and intercooler shroud that are meant to go together that produces an additional air path above and around the mailslot to get air to the intercooler. In the roof the air would split into 2 paths, one that goes through the mailslot and into the shroud and one that goes above and around the mailslot and into extra openings in the shroud. There could be problems getting the hatch to open easily, but it seems solvable. I know it wouldn't be cheap but it should be doable

06-10-2009, 12:46 PM	#134 (permalink)
JGriffin Registered User Join Date: Nov 2008 Location: Ontario, Canada Posts: 5	thats an even better idea! I look forward to seeing it

06-10-2009, 12:56 PM	#135 (permalink)
Thomasio really light stuff Join Date: Jul 2003 Posts: 3,503	Here is a quick photo. The duct shown is pre-production. Two 3" hoses that go to the roof scoop are also not shown. Attached Images __________________ 07 SY Exige S Really Light Stuff Intercooler . RLS Tubes . RLS Water/Methanol Injection . RLS 3.0" Pulley . RLS Wing Plates . RLS CF Window Panel

06-10-2009, 12:59 PM	#137 (permalink)
Thomasio really light stuff Join Date: Jul 2003 Posts: 3,503	P.S. The people who already have the RLS CF Window can easily cut the two holes if they want to upgrade their intercooler airflow. PM me for details. All RLS CF Windows can be ordered with the duct holes or without them. __________________ 07 SY Exige S Really Light Stuff Intercooler . RLS Tubes . RLS Water/Methanol Injection . RLS 3.0" Pulley . RLS Wing Plates . RLS CF Window Panel

06-11-2009, 07:23 PM	#138 (permalink)
Thomasio really light stuff Join Date: Jul 2003 Posts: 3,503	Photo of the complete assembly (pre-production). Attached Images __________________ 07 SY Exige S Really Light Stuff Intercooler . RLS Tubes . RLS Water/Methanol Injection . RLS 3.0" Pulley . RLS Wing Plates . RLS CF Window Panel

06-11-2009, 07:52 PM	#139 (permalink)
ZJChaser Blue Wheel Pimp Join Date: Aug 2006 Location: Laguna Hills, CA Posts: 2,851	looks familiar. These setups so far have been proving to work well. I know of at least 3 other cars with ducting like this. They have everyting from 1 to 3 ducts. __________________ AJ - Akua Solutions - #128 Lotus Exige - JRZ Suspension - Innovative Mounts - Toyo Tires - TW Research Development

06-11-2009, 10:37 PM	#140 (permalink)
shay2nak I <3 chicken, I <3 liver Join Date: Dec 2003 Location: Land of da 1000 Oaks, CA Posts: 15,058	what sort of IATs do these guys see? The setup looks a bit intrusive plus I like having a glass window back there, so I might be stuck. Unless I get a plexiglass replacement??? __________________ save ~10 lbs gain 1 hp EQ: Y=(190X) / (1984-X) where Y is (HP) and X is (lbs) '07 EXIGE S * MY CAR ** VIDEOS! '08 ACURA TSX 6-speed http://www.makeNYNYagain.com

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