Just got back from the dyno testing out the new Whifbitz twin wastegate/scroll manifold on my own car. All I can say is wow, what a difference it makes. Hits 1.6 bar about 500rpm earlier now and peak torque is about 1000rpm earlier, amazing difference.
The changes that I’ve made are
Before: HKS twin scroll manifold with single 60mm wastegate plumbed back into the exhaust, 4″ exhaust from the turbo back.
Now: Whifbitz twin wastegate/scroll manifold with twin 45mm Turbosmart wastegates plumbed back into the exhaust, 3.5″ exhaust from the turbo back.
Everything else is the same.
Unfortunately we couldn’t get a decent power run as the wheels were spinning at SRR dyno as usual, so dont know a peak power output as yet. But we got enough information to say that this really does work. It was making more torque at lower boost with the wheels spinning 1000rpm earlier!
On the road the car is absolutely mental quick, feels much more responsive and you can really feel the difference. I reckon I’ve knocked another 40-50kg off the weight over the winter so that must help a bit to.
Anyway, the manifold is now officially available to sell, just got to work out pricing.