Bother with a lightweight rotating assembly?
08-02-2010, 08:48 PM
#1
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Bother with a lightweight rotating assembly? I have a LS2 block i want to make a 6-71 blown 402 (800+hp).
Option 1.
LS7 crank. Offset grind to 2.000 big end with a 3.920 stroke. Lightweight 6.000" rods and pistons should set me only 80 grams over the factory bobweight.
Option 2.
15+lb heavier Eagle crank. 20% heavier off shelf components, shorter rod.
Cost difference will be about $800. Plus, i don't know what kind of risks i run of blowing up a lightweight assembly. What should i do?
Option 1.
LS7 crank. Offset grind to 2.000 big end with a 3.920 stroke. Lightweight 6.000" rods and pistons should set me only 80 grams over the factory bobweight.
Option 2.
15+lb heavier Eagle crank. 20% heavier off shelf components, shorter rod.
Cost difference will be about $800. Plus, i don't know what kind of risks i run of blowing up a lightweight assembly. What should i do?
08-02-2010, 09:28 PM
#2
Get the Eagle crank and forget about it, put an 8/71 on it to make up for anything, if anything.
LS7 crank is going to need lot of heavy metal if you put steel rods on it + cost of offset grinding.
15lbs? maybe 5 more lbs at most? Typical steel LS 4.000" crankshaft is 53lbs
LS7 crank is going to need lot of heavy metal if you put steel rods on it + cost of offset grinding.
15lbs? maybe 5 more lbs at most? Typical steel LS 4.000" crankshaft is 53lbs
