I have searched and read the many posts on aluminum performance heads and compression. I believe that the overall answer is that horsepower and torque will increase enough to make the purshase worthwhile even though the will be a loss of compression w/o machine work being done up front. I need new heads and would like to upgrade but do not want to back up b/c I haev lost 4 ccs per chamber worth of compression ( w/ Edelbrock which is within budget) and I don't want to shave material now that may be needed later. My goal is to get my 289 to near 300 HP and ftlbs of torque at the flywheel on my daily driver. Right now I have about 180 HP and 214 T at the rear wheels with the engine timed right and the mixture correct.
I think that puts me at about 215 at the flywheel now. The heads should give me about 35 to 50 more??? Even with the loss of compression?? I am running Edelbrock Performer 500 cfm carb, Performer Plus cam, Performer intake, duals through HIPO manifolds, Pertronix dist., roller rockers and know that a different cam and intake will be necessary to get me to my goal.
Thanks for any cure to the confusion. Santa needs to know what to put under the tree.
I think that puts me at about 215 at the flywheel now. The heads should give me about 35 to 50 more??? Even with the loss of compression?? I am running Edelbrock Performer 500 cfm carb, Performer Plus cam, Performer intake, duals through HIPO manifolds, Pertronix dist., roller rockers and know that a different cam and intake will be necessary to get me to my goal.
Thanks for any cure to the confusion. Santa needs to know what to put under the tree.