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#1
06-18-2011, 10:05 PM
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Been away awhile. Back with a non-pontiac car and question!
So my father now holds the firebird, and I recently picked up a very good original condition '70 buick electra 225 with the high compression 455 (factory 10.25:1), literally was an old lady purchase.
I spent the weekend tuning it up to original specs, compression checked the engine and was happy to see all cylinders were 190-200 PSI. My problem is that after updating/tuning the ignition and timing components, I am getting serious knocking when putting any load on the engine. (the previous owner had it retarded so it wouldn't knock). What did high compression owners do when premium leaded gas became unavailable?
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1973 base firebird Original 350, with 69' #46 heads, crower 60240, 9.3:1 cr |
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