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By 78TransAm,
07/22/2012
- 2,229 views
- Pontiac This Or That Score: 990
- Pontiac This Or That Place: 90
out of 1317
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Doug's Headers
HP pontiac found that these headers added 75 hp and 50 ft lb of torque on the dyno. I strongly recommend these for any round port engine out there. My engine now feels like somone removed the potatos from the pipes. · 12/11/2012 -
Carb secondaries
The original sd455 carb has a tab on the passenger side of the upper secondary shaft that only allows the top butterflies to open about 15 degrees. With this tab removed the secondaries open to the proper nearly vertical position. I am certain that this i · 12/11/2012 -
SD455 Timing Desires
The SD came with an electric device to mix ported and manifold vacuum while the key was on. This let the vacuum advance stay maxed during through operation, even at idle. I created a vacuum harness using 2 vacuum check valve and a small in-line PCV valve · 12/11/2012 -
Tail Light Paint
This photo shows what I am going to do on the left and original on the right. · 03/22/2013