346LS1 block vs. 370 Iron block...
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Joined: Sep 2003
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From: "Tr"Asheville
346LS1 block vs. 370 Iron block... How much HP can each of these handle? I'm planning on putting about 20lb's of boost to them with all forged internals (except factory crank) and stage 3 ls6 heads and every bolt on. I need to decide asap, the iron block will cost me quite a bit more since it will be brand new, the ls1 block will be cheaper because I have a friend with a used one with 39k miles on it. What would you do? Thanks.
-Sly
-Sly
if you're getting an iron block , you're better off getting a used ( seasoned) one.
depending on how you'll boost the engine, i would go with the iron block for a turbo and an aluminum block if supercharging using an ati kit. the reasoning is that i't easier to cool the iron block with the stock fans, where as the aluminum block is easier to cool with aftermarket fans( ati kits get rid of the stock fans and replace it with a crappy single)
depending on how you'll boost the engine, i would go with the iron block for a turbo and an aluminum block if supercharging using an ati kit. the reasoning is that i't easier to cool the iron block with the stock fans, where as the aluminum block is easier to cool with aftermarket fans( ati kits get rid of the stock fans and replace it with a crappy single)
ls1 block then put rods and pistons and it should be fine. i'd o ring the heads to ensure a good seal along with arp head studs.
plus its lighter.
beyond 20 lbs of boost i'd go with iron block cause they offer more strength.
plus its lighter.
beyond 20 lbs of boost i'd go with iron block cause they offer more strength.
Originally Posted by 1dirtyZ
i got mine for $500
Kyle
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Thread Starter
TECH Fanatic
Joined: Sep 2003
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From: "Tr"Asheville
That's why I was planing on going the iron block route 
however it'll be a little while before I run that much boost, I still need to upgrade the fuel system and build the meth injection kit.
GotMeSome- I've allready set up to have the block oringed and have the arp head studs on their way as well.
Thanks for the input guys.
-Sly
however it'll be a little while before I run that much boost, I still need to upgrade the fuel system and build the meth injection kit. GotMeSome- I've allready set up to have the block oringed and have the arp head studs on their way as well.
Thanks for the input guys.
-Sly
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Joined: Dec 2001
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From: Columbia, MD
I would check with Mike (Black LS1 T/A) before you drop in that iron block. You will have to overcome the extra heat and extra weight. You might even have to start mixing in a little race gas, from I hear from Mike, that sucker gets plenty hot in the summer.
Thats why I just stuck with aluminum.
Thats why I just stuck with aluminum.
No problems here with my Iron block...........dealing with heat..... Motor temps are the same as before, but summer just started and we havent been over 85 yet......
Originally Posted by BAD *** TA WS6
I'm waiting to see what happens with the 6.0 aluminum LS2 block
If that doesn't work out, I'll probably go with a setup like Kyles.
Rob
If that doesn't work out, I'll probably go with a setup like Kyles.
Rob
I take it you talked to the Boys at AP Engineering......... Great guys to deal with and great customer service.
Kyle
Originally Posted by slyws6
I have a ? for you guys. I was told the 6.0L blocks need an extra hole tapped in them for the AC bracket...is this true and which hole is it?
-Sly
-Sly
Kyle
