"Van Diemen SR Sport 2200 is an open 2-seater purpose-built race car made by Van Diemen. Originally it was introduced by the Finnish F1 champion Keke Rosberg in 80's and they had own racing series in Finland. Engine and transmission are standard series production units by Subaru. "Formula-like" behaviour from this light car with fully adjustable chassis is an impressive sight even with a standard engine.  Historic Race Finland conducts the races for this class helping the cars, which are part of the Finnish motor racing history, to be preserved and stay in Finland."

(Text taken and modified from HRF's web site)
In 1998 I started racing in the Sports Car class in Finland with the Westfield.  However there were very few other cars to race against.  However, our class was on track at the same time and therefore almost racing against these Van Diemen Subaru's.  It didn't take me long to spot that these guys were quicker due to the nature of their cars, and they also spent a lot less time fiddling with them between sessions etc.  The car is powered by a standard EJ22 engine from the 2200cc Subaru Legacy.  The gearbox is also a standard item from a 2wd Subaru.  This makes it a very reliable (touch wood!) class to take part in.  The only mechanical repairs required since acquiring the car in 1999 have been: two new drive shafts which I broke almost the first time out and a gear selector for fifth and reverse which was changed this spring. 
I joined the Van Diemen class in 1999 therefore having bought the car during the winter of 1998 - 9.  I did very little to the car when I got it other than attempting to give myself a bit more leg room by shortening the pedals a bit.  However, I didn't at that time relocate the pedal box itself.  I have during winter 2001 - 2 relocated it about 20mm further down the footwell and this has been a major improvement.  I feel much more comfortable in the car and am only sorry I didn't do so before.

Joining the class was a significant learning curve for me.  Suddenly I had to work much harder on understanding what changes to the chassis would bring about the change in behaviour I was looking for.  With toe, camber, castor added to the usual anti roll bar and tyre pressure changes all to be determined as I went along it was a new ball game compared with the Seven I had raced previously.  The car also appreciates a smooth style, not something I could lay claim to.  Where one can get away with a more ragged style in the seven, ragged in the Van Diemen simply means slow.