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Aluminum vs. Iron

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Old Feb 3, 2009 | 07:12 PM
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Default Aluminum vs. Iron
If built properly, how much boost could an aluminum block handel? I want to build something to withstand atleast 20lbs of boost, would an aluminum block work or would it just be smarter to go iron and build a 408 or something along those lines
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Old Feb 3, 2009 | 08:11 PM
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Fireball was running 25-25 psi on his ls2 block with no issues,but if weight is not a concern i would always go with iron-less bore distortion and better ring sealing
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Old Feb 3, 2009 | 09:21 PM
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go with ERL block. i am going to do that
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Old Feb 4, 2009 | 08:50 AM
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Ya I wanted something that would make near 1,000HP but I wanted to drive it atleast a couple time a week
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Old Feb 4, 2009 | 10:20 AM
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1000 wheel or flywheel?
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Old Feb 4, 2009 | 10:44 AM
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I went iron not too worried about the extra weight.I am targeting around 1000rwhp max with some spray.
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Old Feb 4, 2009 | 11:45 AM
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Originally Posted by Shawn @ VA Speed
Fireball was running 25-25 psi on his ls2 block with no issues,but if weight is not a concern i would always go with iron-less bore distortion and better ring sealing

x2 iron>aluminum
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Old Feb 4, 2009 | 12:03 PM
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Originally Posted by Shawn @ VA Speed
Fireball was running 25-25 psi on his ls2 block with no issues,but if weight is not a concern i would always go with iron-less bore distortion and better ring sealing
unless someone was crazy enough to fill the waterjackets with hardblok on an LS2 block
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Old Feb 4, 2009 | 12:08 PM
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Originally Posted by Fireball
unless someone was crazy enough to fill the waterjackets with hardblok on an LS2 block
Did that crazy person do a half fill or a full fill I would imagine that even a half fill would help a lot to stabilize the cylinders.
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Old Feb 4, 2009 | 12:13 PM
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Originally Posted by ls1290
Did that crazy person do a half fill or a full fill I would imagine that even a half fill would help a lot to stabilize the cylinders.
some people are crazy enough to leave that decision up to their engine builder
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Old Feb 4, 2009 | 12:16 PM
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Originally Posted by Fireball
some people are crazy enough to leave that decision up to their engine builder
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Old Feb 4, 2009 | 12:18 PM
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around 1000 at the wheels. By around i mean anywhere from 900-1000 at the wheels. I'd be happy with that.
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Old Feb 4, 2009 | 12:21 PM
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Would an LQ4 be strong enough or should i go strait to LQ9? I wanted to do a truck manifold setup pushing around 18-20psi with a decently size motor.
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