http://www.honda-tech.com/zero...85480

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Updated pictures of the process to produce the diffuser on page 3:

http://www.honda-tech.com/zero...age=3

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Hello,

I would like to gauge the level of interest in a carbon fiber diffuser made completely from dry carbon and baked in an autoclave under a vacuum. The diffuser will be universal and it should fit most Honda's. If you would be interested in a product like this please post so I can gauge if it will be worthwhile to produce the diffuser. Here are a few pictures of the diffuser, let me know what you think:

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Modified by RPM at 9:19 PM 6/27/2008

Modified by RPM at 9:20 PM 6/27/2008

Modified by RPM at 5:51 AM 8/20/2008

Universal Carbon Fiber Diffuser:
http://www.honda-tech.com/zerothread/2285480

Special Thanks to:

Pro-Car Innovations, Special Projects Motorsports, JohnDHoward.com, JLBMotorsports, VMRWheels, Imports@UCI, Plan:B Motorsports

KICKS FOR SALE!
http://www.hondamarketplace.com/zerothread/2311643

EMAIL: matt@jdmtheory.com

Also another issue might be club racer rule books, I know in Honda Challenge its not allowed or I would buy one today I like that better then cutting holes in my bumper or cutting the bottom section of my bumper off to releave pressure. So it leaves time attacker, street car(hardly worth imo), TT guys

With all that being said I still want one!

Wet lay carbon fiber products are heavy, structurally weak, and have a tendency to delaminate. If I move forward with producing this part it will not suffer from any of these issues because it will be made from pre-preg carbon fiber.

Modified by RPM at 5:54 AM 8/20/2008

Universal Carbon Fiber Diffuser:
http://www.honda-tech.com/zerothread/2285480

Reduce material cost- Produce the part in fiberglass, maybe one layer of 3k carbon fiber and multiple layers of fiberglass. You'd get a cheaper part but it wouldn't be as strong as something made completely from carbon fiber.

Reduce labor cost- I can have the part shipped as is directly from the mold. This means all the flashing will still be on the part and the buyer will have to cut it off. It's not hard it just takes a little time. The part will have all of the appropriate marks so the buyer just has to follow a line with their cutter. You'd still get a high quality dry carbon piece but you will have to put in a little elbow grease before mounting it to the car.

Honestly though, $575 is a knockout price for a piece this size and done up properly. I am using aerospace grade carbon fiber and producing it using an autoclave. I can assure you that none of the other diffusers on the market nowadays use an autoclave, at least I haven't seen any. Thoughts?

Universal Carbon Fiber Diffuser:
http://www.honda-tech.com/zerothread/2285480

What have you done for testing / R&D?

is it universal or car specific? I have a Dc2-R

does the 575 include shipping?

Kiwi

Modified by KIWI at 8:52 AM 4/25/2008

Thanks to our sponsors...
Clutchmasters, Torco, Hasport, Progress, Gear-X, StopTech, Hondata, Vibrant Performance, Evolution Industries, Buddy Club, 2B-Cool, and all the crew

I've been JDM since I was 10, collecting those Japanese Pokemon cards

For those of you who don't know, here is a previous product that I produced for the ITR community:

http://www.honda-tech.com/zerothread/2201291

Universal Carbon Fiber Diffuser:
http://www.honda-tech.com/zerothread/2285480

Thats an awesome workshop you have!

The diffuser is awesome, Id rock one if it was legal in HC.

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Universal Carbon Fiber Diffuser:
http://www.honda-tech.com/zerothread/2285480

can you make one off pieces by request?

Click HERE to see my turbo manifold designs!

Actually, vertical vanes won't shed any vortices to flow that travels parallel to them. You need to have serrated edge on the back of them, sort of like a gurney flap to generate vortices (or small right angle/delta tabs).

BTW, if you do not have a degree in mech/aero engineering I wouldn't go spouting stuff off like that. There is absolutely no reason why you would want to generate a big vortex at the trailing end of a car, the main reason why an aerodynamicist would want to spawn a vortex is to keep the flow attached to a surface that would otherwise have a large amount of flow seperation. Keeping the flow attached would help reduce drag, and possibly increase downforce. But obviously, this would be useless at the tail end of a car.

In addition, your mounting method is absolutely pitiful. You are using incredibly long (3/8"? bolts). If you were generating any actual downforce with that part then it would put a large amount of load on those bolts and they would probably fail from overloading.

IMHO, your mounting method is what is the real deal breaker. You need to mount the diffuser completely flush (not with big gaping holes at the front), a good idea would be to mount it to the tie bar and seal the area ahead so absolutely no flow can go over it.

After all this is accomplished, you would need to do some extensive testing/tuning. Fortunately this would not be that difficult, you can use some of that flow paint and go for a high speed drive to see if the flow is actually staying attached. You can also use wool tufts, but that's a bit more difficult.

And, really, to be honest a diffuser is pretty worthless unless you've done a lot other aero work on the front of the car. A diffuser has to be fed an appropriate volume of air in order for it to be effective, so you would need to make completely flat panels that ensure there is no flow separation ahead of the diffuser, otherwise that $600 piece of carbon is just a showpiece.