drf255
BAD CAD
It seems that big bore kits produce less power than their smaller bore OEM counterparts.
However, increasing displacement always seems like a good idea.
My understanding has come to be that the AM "big bore" kits have poor port timing and smaller cross sectional transfer area secondary's to the larger bore. Then there's the squish issues, where the tolerances of the AM P&C are just sloppier.
My question is this, with proper machining and porting/welding, has anyone made a big bore kit outperform a factory jug?
My specific project will be either an 044 or an 046 with a 54mm jug. If I can get a P&C cheap enough to not mind the likely destruction.
I plan on welding up the transfers on the outside to permit making them deeper, porting and cutting the base and band.
However, increasing displacement always seems like a good idea.
My understanding has come to be that the AM "big bore" kits have poor port timing and smaller cross sectional transfer area secondary's to the larger bore. Then there's the squish issues, where the tolerances of the AM P&C are just sloppier.
My question is this, with proper machining and porting/welding, has anyone made a big bore kit outperform a factory jug?
My specific project will be either an 044 or an 046 with a 54mm jug. If I can get a P&C cheap enough to not mind the likely destruction.
I plan on welding up the transfers on the outside to permit making them deeper, porting and cutting the base and band.