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Old 12-09-2012, 07:42 PM
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iron makes more power hands down.
alum is easier to cast/machine/etc and why they use it..
pore the same heads in both, iron will win everytime
heat = power, alum transfers it, iron holds it..
with a fuel that not pre ign. iron all the way..
r09 engines heads where taken by nascar that where iron.. because the walked over the field
team fined 100k
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