Mk2 Golf Kamm back - foam it or coroplast?

[Piwoslaw]

I see the mudflaps are gone
Oh, but wait! What have they exposed? Those tires, they are hurting my eyes
They look pretty new, so I guess it will be a while until you can replace them with something narrower and with less RR? Will you be doing smooth wheel covers? Mcrews has a thread on clear ones.

Originally Posted by syncro_user

As it happens, I was hoping to extend it a lot further, but after some trimming and folding this was what I ended up with.

When you build the solid version, you can make attachment points for an extension. The permanent shorter version would be for city driving, the extension would be added for longer trips.

Originally Posted by syncro_user

Today I sprayed it with a little stonechip paint to (try to) match the textured plastic on the rest of the car:

Looks good Probably attracts much less attention then when it was plain, naked cardboard

Btw: Show us your grille block!

[syncro_user]

Grille block building session was unfortunately interrupted when I found a loose wheel bearing. Turned out that the CV joint nut had come loose, so I tightened it up as a stop-gap measure for a road trip. It will be changed.

I have actually found my FE has dropped post kamm-back?! Best FE went from 44.8mpg imp to 42.6mpg imp on country roads, and I'm now only getting 37-38 mpg highway driving. Roping in the in-laws tomorrow to help tuft-test it. Really don't fancy ripping it all off. Hopefully a little adjustment will sort it.

[Piwoslaw]

Originally Posted by syncro_user

I have actually found my FE has dropped post kamm-back?! Best FE went from 44.8mpg imp to 42.6mpg imp on country roads

That's only a 4-5% difference, so it might just be other factors, like slightly different speed, traffic, etc.

[syncro_user]

Well, we'll see how it turns out. I did some tuft testing today, which showed the horizontal section as having attached flow up to at least 100 kph, but the side pieces had seperated flow from 80kph upwards. I will adjust them to a less severe taper and see how they work out.

I'm looking for some narrower wheels and tyres but hanging out for a good price from Germany. Should be able to get some BMW Mini wheels with tyres for around 300 euros, then sell my existing ones on to pay for them.