po9rs5che1

That really looks great!! Very nice workmanship Andrew!

testarossa_td

Take an overhead shot of the top part(lay it on the ground and make sure you are about half way on zoom and wide angle) and I will do my best to recreate a template for that piece as well(without rubber stripping).

NZ951

Will do, remember this is my testpiece to see if it gave any improvements, so its not a perfect fit (at all), but not far off either.

NZ951

Pic as requested. Remember its not exact, it was made to prove the box lid is a very important part of the concept.

testarossa_td

Check the paths layer(on the jpg) for the vectors on this.
Then scale it based on the 22 CM back wall.
Again this was built on approximation to his design based on potential lense distortion etc.

Enjoy....post your home grown versions of the C.A.B. (Cool Air Barrier)

NZ951

Great job!

Here is a teaser of the next piece to test. I am not sure it will be done today because of the cure time of the adhesives. Plus I think I will have to make another bracket to fix the ducting to.

NZ951

more... should have some temp data tomorrow.

NZ951

Ok, did some testing!

With the lid on and this ducting in place, cruise temps were 4 degrees C below ambient! Thats a circa 2 degree C improvement. The drop was seen on boost. I am not sure the spot is the best place for the ducting to start because of the obstruction, but it still works and is hidden this way.

Ian Carr

Wow thats awsome great work.. maybe i can buy some of this off of you eh?

-Ian

Mikeaagesen

Nah, let's really put him to work with a group buy! I'd jump at the chance.

Daddio

That looks great, Andy! But, DO try and stay out of deep mud puddles.

Next, you need to make a nice big funnel to fit the front of that flex tubing.

NZ951

he he he well, Now I know the shape and its very straight forward, I could get a bent pvc pipe and fit in an AEM bypass valve. I think every couple of months I may just run a hose down it! The other choice is to run it a little higher but it wont get the flow. Once I feel there is enough development done to test the air pressure there, I will much around with the placement more. I am hoping a vendor will take the very easy to install design and maybe make a few!

Daddio

Put the funnel as close as possible to the centerline nose of the car, which is the aerodynamic stagnation point of the airflow, so has somewhat higher pressure: You'll get some ram air effect.

Now, be advised that some purists will rant about how that won't help much, if any.

Granted, it won't make a scramjet out of your car, but the extra pressure from ram air effect will largely offset pressure losses and line friction from the air fliter, etc., so you'll be getting filtered air without paying the pressure-loss price for it. Worthwhile, methinks.

For a funnel template, some large vacuum cleaner fittings (shop-vac type) may be worth a look.

NZ951

Great idea Daddio... here is an idea, why not make a HUGE rectangular shaped funnel tapering to the 2" hose to fit just below the radiator height in the cavity in the centre. May be some more work, but would be stealth and effective. I would paint it black then and could maybe have two ducting points then... hmmm

Daddio

Well, why not? Use the entire cavity of that section behind the horizontal plastic grill. You could put a screen over it to keep out all debris except dust. At the very least, I'd suggest putting a radius on the leading edge lip of that hose: Fluid dynamics and sharp edges are not compatible. Funnel would be better, though, to ram the air down the hose.