ls swap cast iron or aluminum
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Junior Member
Joined: Jun 2015
Posts: 61
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From: Thornton, CO
Car: 1987 irocz28
Engine: 305 tpi
Transmission: t5 5 speed
Axle/Gears: GU4 3.08 g80
ls swap cast iron or aluminum
Looking at doing a ls swap and checking out blocks on summit. I thought aluminum was way togo but was reading specs and they said cast iron handles more hp. I will be going twin turbo trying for some really good hp well above 500. Soshould i go cast iron or aluminum? I sezrched but could not find anything regarding this exact question.
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Joined: Jun 2013
Posts: 497
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From: El Sobrante, California
Car: 1984 z28
Engine: Crate replacement L31R 350
Transmission: T56
Axle/Gears: 7.625" 28 spline 3.23
Re: ls swap cast iron or aluminum
It really depends on how greedy you get.
Aluminum has handled well over 500 from the factory.
Iron has the capability to handle much higher HP.
If I was looking for no more than 700 I would not hesitate running aluminum.
Aluminum has handled well over 500 from the factory.
Iron has the capability to handle much higher HP.
If I was looking for no more than 700 I would not hesitate running aluminum.
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Joined: Jan 2011
Posts: 173
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From: Nashville, TN
Car: 1988 Camaro Iroc-Z Convertible
Engine: LS1
Transmission: T56
Axle/Gears: 8.8 with 4.10 Gears
Re: ls swap cast iron or aluminum
For what it's worth I saw a Sonoma GT with a turbo LS1 (aluminum block) put down 750hp to the wheels at LS fest last year.
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