Originally Posted by
Chip
No help at all given that you didnt even mention the spec of your car, nor wether that was off a speedo or proper timing gear
speed taken from road angel and my speedo actually underreads.
polished head virtualy standard port size, bd14s, t4 at 2.2 bar from 5000 rpm up to 8000. 7.5 comp 865 siemens.