It needs to be hot blown rather than cold, the gas speed with be pretty low from just diverting the little extra air from the BOV.

 

I love when I see guys at the grassroots level experimenting with F1 technology. I think it could work, given the following conditions:

1) The diffuser is designed properly, and is effective at creating negative lift.
2) The exhaust is routed to exactly the right point(s) upstream the diffuser entrance to positively impact air flow/volume.
3) Keep the engine pumping air continuously, even during full deceleration. This is how it's done in F1. This could be accomplished with a drive by wire throttle and a proper standalone ecu. You'd keep the throttle open, but ignition and fuel cut. Pretty similar to turbo "anti-lag" strategies, offered in many aftermarket ECU's.

Next step is to get some DRS going... Shouldn't be too hard. I'm thinking a couple of small electric actuators

 

haha as for DRS its illegal in NASA but I have gone over some designs. Strong fast actuators get expensive so I designed one that was spring loaded on 2 cables (like throttle cables) that would run back to the wing mounts that would pull the front of the wing down at a really steep angle whenever the brake is pressed and it would be instant response. dropping the front of the wing down under load is easier than trying to push the back of the wing up like the vyron this was just for a braking concept of course. (air brake) Doable and cheap! Just have to get around the rules some how…

but back on topic. I looked into the transfer of heat back to the charge pipe if the wastegate were to be attached to the exhaust to recover wasted boost. I found this company that makes gaskets similar to those white intake manifold gaskets that lower intake temperature but for the exhaust side, didn’t save the link two of those on both sides of the wastegate may restrict the heat?

As for cold blowing I was thinking the wasted boost would mix with the super heated exhaust gas way up at the header. Doubling airflow and possibly lowering exhaust temps aswell?

 

I think you have some good ideas. But remember, the benefits of a blown diffuser are in the corners, when you're usually off the gas pedal or low throttle positions (not much air moving through exhaust). This is why you'd need a good EMS with DBW control (ViPec, Motec, Pectel come to mind for this application), which will allow your engine to work as an air pump off throttle. This also means the SC will be forcing extra air into the engine, out the exhaust.

Once you get the engine side of things working, you can focus on the exhaust. Install some strain gauges on your diffuser mounts. Do controlled tests (i.e. straight line at several determined velocities), and you should be able to see if the blown diffuser is effective. Then, play with exhaust location and repeat the tests to determine best location of exhaust. Good luck!

[media]http://youtu.be/v8qvspPW75E[/media]

And... You can hear the engines pumping air off throttle and/or light throttle through the corner.

[media]http://youtu.be/hh7Tuz93doM[/media]