Hi,
its been a while since i last posted and thought i would update you on my Rallcross build.
I posted a few pic's a while back in the introductions link

I have a load of pictures on my website in the gallery section under S2000 build link

but here a few new photos.....
a pick of the extended rear wheel arch - and a big hole cut into the boot lid


to allow for airflow for the rear mounted rad


this is a pick of the supercharger and oil pump mount - mounted up on a spare engine on the bench


and a pic of the car with some fresh paint

 

Nice! very unique

 

Any information on the supercharger setup? I haven't seen one mounted at that location before. Is it all custom or is there a kit?

What is the reasoning for placing the radiator in the trunk? My guess is to keep rocks from punching holes through it? Are you going to intercool the supercharger? oil cooler? Will those also be mounted in the trunk?

Very unique project!

 

What are you going to do about ride height issues? Wont clearance be an issue for rally cross?

 

Thanks ....

spets,
The supercharger mounting is a custom set up and fabricated to incorprate the alternator and the oil pump so it could sit under the plenum.
And the radiator has been put in the trunk for weight distribution and as you correctly guessed to keep it out of harms way.
Yes - there will be a very large intercooler in the front for the supercharger, along with oil coolers. I would have liked to get the dry sump tank in the back but due to lack of room it will only make it as far back as the passengers footwell. but the fuel tank/pumps will be in the back just in front of the radiator.

Fujin,
There is not any problems with ride hight. All suspension, mounts, wishbones and dampers etc are all adjustable and custom made/located.
I was planning on an initial set up of about six inches (the photo above is not showing the car set up. it has just had some wheels thrown on to get it off the stands, i think it is about three inches at the back and four in the front in the pic)

 

Very interesting build, but I'm thinking the mesh boot lid will destroy your wing's low pressure area. Be sure and test with/without the wing because it might not be worth the drag and weight to run the wing. Raising the wing to the roof line will help.

 

Actually, if the fans are going to be pulling air front to back through the radiator, it could increase the effectiveness of the wing by adding airflow to the lower surface and energizing it via the coanda effect; similar to a C-17 blown flap or an An-72.

 

The airflow runs from the intakes above the rear wheels out the rear of the "boot" but it will be very turbulent from the fans and mesh and a relatively low volume so I doubt that it could be beneficial but you never know with aero--that's why I say test with and without the wing.

The C17 engine exhaust hits the "high pressure" underside of the wing/flap for extra lift generation (opposite of this situation). The exhaust is also vectored downward by the flap for additional lift.

 

we did do some basic airflow tests with some borrowed software, and it looked as if it should be ok with the wing - the sweet spot was directly behind the car so we took as much of the rear of the boot/trunk lid as possible - still its easy enough to take off the wing if needed.

 

supercharger mount now bolted onto engine, and spacer made for the plenum (still needs to be lightened) but it all seems to fit.
just waiting for the pipes to come back to fit the oil pump and then i can install the intercooler and finish the plumbing