HP gain of 10.5-1 pistons vs 8.8-1 in a 273.
How much difference in HP would be gained by replacing the 8.8 to 10.5 pistons? 8-10%??Been working on a 1965 2 barrel 273. It was a low miles (35K) original motor from a Dart. Rebuilt with original 8.8 pistons,rods. Honed cylinders not bored, crank polished.Heads redone.
Added the E4 isky cam and lifters. Factory 4 barrel intake and 575 cfm AFB. Electronic ignition .Have the finned valve covers and chrome air cleaner. It is dressed out top to bottom although I have not secured the intake,timing cover or pan gaskets or primed the oil pump. Just sitting on the stand contemplating what to do with it. I never intended for it to be a hot rod...just a bit more pep. than the 2 barrel version. Plan was to find a early dart/valiant /6 car and change it out with a 4 speed. Plans changed when I bought my Dart Gt this past Feb. The hp 273 in my 1965 dart Gt has plenty of power for me even though it has the 904 auto. I guess if I sell it in the present state, buyer could change to the Egge 10.5 -1 pistons with a bit of effort.
How much difference in HP would be gained by replacing the 8.8 to 10.5 pistons? 8-10%??Been working on a 1965 2 barrel 273. It was a low miles (35K) original motor from a Dart. Rebuilt with original 8.8 pistons,rods. Honed cylinders not bored, crank polished.Heads redone.
Added the E4 isky cam and lifters. Factory 4 barrel intake and 575 cfm AFB. Electronic ignition .Have the finned valve covers and chrome air cleaner. It is dressed out top to bottom although I have not secured the intake,timing cover or pan gaskets or primed the oil pump. Just sitting on the stand contemplating what to do with it. I never intended for it to be a hot rod...just a bit more pep. than the 2 barrel version. Plan was to find a early dart/valiant /6 car and change it out with a 4 speed. Plans changed when I bought my Dart Gt this past Feb. The hp 273 in my 1965 dart Gt has plenty of power for me even though it has the 904 auto. I guess if I sell it in the present state, buyer could change to the Egge 10.5 -1 pistons with a bit of effort.
