| Engine Dyno Predictions: |
Subject: Engine Dyno Predictions: by wesmigletz on 2008/12/23 19:07:27 Well, it's done. Finally got around to putting my stroked 327 on an engine dyno. The combo: My car's original, numbers-matching 1962 327/300 HP block and heads Bore is 4.040" The heads have been cut for 2.02/1.6" valves Some minor port work 3.85" stroke crank, internally balanced 6.00" Manley SJ Rods 22 CC Forged, Ross Dished pistons Off the shelf Comp 282 Retro-fit HR Cam, ground on a 112* LS Morel Retro fit HR Lifters Comp Gold 1.6 ratio roller rockers Weiand Team G intake, opened up to a 1206 gasket 750 CFM Carb 1 3/4" X 3" dyno headers, 18" X 3" collector extension The engine was base-lined with the above combo, fuel and timing curves were optimized for max power. All tests were done on the same SF-902 dyno, on the same day, with the same correction factors. Each combo was optimized for both timing and fuel curves. The cam was picked by me, based on how I drive the car. The intake, while not ideal for a street car, offered the best potential, given the constraints of my vehicle's hood clearance. I would have rather ran a RPM air gap, or a Weiand Air Strike, but the bottom line is that they will not fit under the hood of my car. I have ran this engine at the track with a Weiand #8120 low-rise dual plane, and the Team G, in back to back weeks. Despite being handicapped with a 5000 RPM shift point, the Team G was worth 2/100ths and nearly .5 MPH vs the 8120. The 8120 was no slouch, and produced a 12.79 et at Famoso. First we tested a set of 200 CC Dart Pro 1 Platinum Heads. We then tested a set of 195 CC Eliminator heads. What are your predictions for: 1. What was my return for the $1400 investment to swap to the aluminum 200 CC Dart Pro 1 Platinum heads? How did the wet-flow heads fare vs my 46 year old power-sapping Camel hump heads? 2. With no other change, than swapping to the 195 CC AFR street heads, what was the net effect on power? Did the AFR heads deliver? I no longer have mere opinions or speculations, I have dyno results. I helped swap the parts and dialed in the carbs. Fire away... |
