Originally Posted by broddler
Jamsport ran a back to back test in performance ford in july 2006.Standard head with a standard cam, then a ported head with standard cam then ported head with a piper cam. Total improvement with piper cam and ported head was 48BHP. I belive Nick from the mag still has it on his car.
Too many floors to be accurate.
To be fair,
- The std head needed to be cleaned, checked and rebuilt before test,
- A new std cam,followers, valve springs needed to be fitted,
- both cams needed the lobes checking for lift before and after the tests,
- both cam's needed to be timed correctly with a vernier,
- C/r's needs to be measured and adjusted till both the same.
- The same boost, AFR, and ACT needed to be log and seen
- the only things that should be changed, ign timin needs setting, and fueling needs to be set to the same AFR.