I need more speed before the next one mile run. The exhaust system will
get this exhaust cutout for better breathing and turbo spooling. I bought
it from Summit Racing and had to shorten it because the exhaust pipe
didn't have a long enough straight part. It will be closed in road traffic
and open on track days.
The cutout will be placed after the
lambda sensor and before the cat.
I added a helper spring to the wastegate in order to keep the wastegate
shut a little longer and to make a little more boost. I found a good set
of tension and compression springs at the local Biltema. The testing with
the spring and fuel mixture seemed to work because I ran my best
quartermile ET 15.152 at 148.03 km/h (92.0 mph). With a total weight of
2930 lbs this means approx. 178 rwhp.