RE: o.S. 91 FX with Baffle type Tuned Pipe, how long
it does. The engine is not even run in yet and it turns a 15x8 at 8500rpm with unlimited vertical on 10% nitro and Model echnics 3D plug.
Pipe + header lenght set to 56.5cm.
Bloody thing won't idle though. Guess it needs more running before it settles.
So far it meets the performance criteria