So I got done doing an exhaust header size comparison between the Bursch 1.750" headers and the Bursch 1.625" headers (both without heat boxes) and the 1.625" headers won the shoot out on the dyno (as had been predicted by forum denizens).
Dyno data:
One thing the dyno doesn't show is the driveability and I had rebuilt my 2.7L engine into a high revving 2.8L with 911S MFI camshafts (WebCams p/n 05-062) which runs well on the highway, but is really challenging to drive around town or in stop and go highway traffic. The engine won't run below 2000rpm when cold, power from idle to 2000 rpm is non existent, etc.
Anyway, I was introduced to William Knight (knightrace), of the M1 cam fame for CIS engine owners, and he suggested his K45 camshaft and said it would give more torque across the rev range and be more driveable, so I ordered and and have received my K45 camshafts.
Now it's time for the camshafts swap. Engine / transaxle are out of the car and the engine is back on the engine stand for surgery.
