Have any of you guys heavily modified an SPi engine whilst maintaining the SPi, i.e head, cam, exhaust? If so how did you alter the mapping or fueling to cope?
ANyone got any ideas?
Does the SPi just use throttle position to determine airflow?
The problem: A 1.4spi. Modified head, cam, custom inlet manifold (Tubular), exhaust and manifold, larger TB. Whats the best way of adjusting the management, is it possible to remap, and will I need to upgrade the injector?
It's strange, but I do want to keep the SPi.