Little Red Devil

[h100vw]

Oh yeah, good job mate!

[sam_vw]

Great work mate! Is there much clearance around the 4" expansion chamber to the bulkhead etc?

[VWindahouse]

Hey Ant, Porsche club day at willowbank must be around again soon hint hint

Not a bad idea mate, you keen?

Great work mate! Is there much clearance around the 4" expansion chamber to the bulkhead etc?

Cheers Sam TBH I didn't get to see the trail fit but he tells me there's not much.

Also enlisted the help of Gav and his grinder in reducing some rear end drag















Also borrowing an idea from the Honda drag boys that should be here soon.

[VWindahouse]

And got a baffled sump from Forge that looks pretty nice

[VWindahouse]

One step closer to some free flowing goodness





And massive thanks to Greg from Carformance for this very nice 42DD stainless tip



And here is the idea stolen from the Honda Civic drag boys



Installed in the bumper to free up drag they have seen an increase of 4-5mph trap speed for the 1/4 mile But a total pita to install on the Polo as the Polo's bumper is curved and these thick alloy plates are not So got creative and bent them around a ceramic pot plant to get the right curves. Took ages. Then primed, positioned and drilled.



And marked



Then the fun part





And after 3 hours or so, done!



Sorry really crap pic, will grab a better one tomorrow.

[team_v]

looks pretty hektik Ant.
I didn't realise how much under body restriction there was on these cars at speed.

[VWindahouse]

Yeah heaps apparently Clay. A hatchback coupled with a rear torsion beam suspension set up is no friend to efficient aerodynamics.

But doing my best to fix that

[vwthunder]

Sorry really crap pic, will grab a better one tomorrow.

Wow love these, they look awesome, really do suit the race car theme, well it isn't really a theme is it !!!

[VWindahouse]

Hi Ant, well done. Thought that you were going to vent the rear bar, somehow. More photos?
Any additional NVH from the vents? They look quite good.
Have you abandoned fully the idea of rear diffuser?
Cheers Al

Cheers Al! No more NVH than before luckily. Most of that was a result from ditching the rear seats. But that was soon drowned out by the turbo whistle and now the induction noise since the bonnet vents went in. For a small car it sure does sound angry

Yes I don't really think a perfectly functional rear diffuser is an option with this car. So the plan is to just get rid of anything from a drag perspective. All that's really left now is mounting the new muffler a bit higher in the tunnel as there's a tonne of room up in there



and moving the exhaust hanger next to the outlets to the right hand side between the muffler and spare wheel well

Wow love these, they look awesome, really do suit the race car theme, well it isn't really a theme is it !!!

Thanks mate, they're another mod that I was a little worried about but thankfully worked out well. Haha yes it's a just a theme until next year I guess. The real pressure starts in the way learning how to drive in absolute anger to do all this prep work justice.

Got some better shots this morning





I'll finish painting the rest of the chassis black when I get a chance so it all looks nice and stealthy.



It's pretty clear these will do the job of evacuating the air pretty well

[VWindahouse]

I don't see the rear torsion beam as being an issue - in fact I think it is better than anything else for clearing the space at the rear. Rear wishbones or a multi-link rear end would place more components in the air path.


I think you could make it work if you were to remove the spare wheel well but then you would need to reroute the exhaust to the side directly (use a big resonator instead of a rear muffler?) to make it full width.

Greg, sorry I meant that you can't attach a flat diffuser to any part of the beam or over it because of the suspension movement.

I would love to delete the well, but in both categories I'm looking at competing in you can't. Plus I might look at adding a fuel cell for the E85 in it eventually.