hi,
building a performance magnum is not easy, it will be not easy like a chevy for parts, all expensive and inusual... so I show you my choice and it will give you some idea.
because I use only lpg or ethanol, I use high compressio like 14/1.
for this I use KB piston with highest dome for LA engine and on the piston I mill the 1mm quench area to zero, and milling into for the same weight, and I mill a corner in the cylinder head, after checking clearance piston/head I mill chamber ti one cc max difference, (stock is 61cc to 66cc!), buying this on rockauto from enginetech, they have reinforced valve seat, nice!
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and use eagle connecting rod for LA engine, mill to same weight,they fit perfectly the magnum;
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but before, don't forget to balancing the crankshaft because if you change one thing you need to rebalance, so i build lead mass at the gram, each balanced, to one reciprocating weight and two rotating weight:
![]()
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for balancing I use universal electronic dynamic balancer and I finish with one gram of precision at 500rpm, may be it's possible to obtain a internal balanced engine with this connecting rod, with 150 gram less than the stock weight.
I hope it will work fine and it will give you idea.
building a performance magnum is not easy, it will be not easy like a chevy for parts, all expensive and inusual... so I show you my choice and it will give you some idea.
because I use only lpg or ethanol, I use high compressio like 14/1.
for this I use KB piston with highest dome for LA engine and on the piston I mill the 1mm quench area to zero, and milling into for the same weight, and I mill a corner in the cylinder head, after checking clearance piston/head I mill chamber ti one cc max difference, (stock is 61cc to 66cc!), buying this on rockauto from enginetech, they have reinforced valve seat, nice!
and use eagle connecting rod for LA engine, mill to same weight,they fit perfectly the magnum;
but before, don't forget to balancing the crankshaft because if you change one thing you need to rebalance, so i build lead mass at the gram, each balanced, to one reciprocating weight and two rotating weight:
for balancing I use universal electronic dynamic balancer and I finish with one gram of precision at 500rpm, may be it's possible to obtain a internal balanced engine with this connecting rod, with 150 gram less than the stock weight.
I hope it will work fine and it will give you idea.
