AW794

iTrader: (7)

I have some questions about the aluminum LS1/6 block strength compared to the LQ4 6.0L iron truck block. I was always under the impression that the iron block would be stronger that the aluminum block, but I heard through some people that I am wrong. SO I need some input from the LS1 gods that are on this forum...hehe.

I’m not real sure what I plan to do with it (forced or NA) and it will be going into a daily driven T/A. I have heard that the iron block is 92lbs heaver than the aluminum block (Can anyone clarify that?).

Forgive me if these questions have already been asked, I did a search and came up with 25 different pages..lol

Thanks for the assistance, guys I appreciate it


AW

ls1290

iTrader: (20)

I replaced my old 383 aluminum stroker with a 402 iron stroker. The LQ4 block is 92 pounds heavier than the LS1 block. The LQ4 block is stronger, ut unless you are going to run a power adder like a turbo, supercharger, or nitrous I would stick with the aluminum block.

Boostaholic

iTrader: (4)

Well, if your going to bore it over the LQ4 block is a lot cheaper, if you want to get a 4030 LS1 you will need to get it resleved for sure, which can cost a pretty penny.

2MuchRiceMakesMeSick

I would look into a 408 iron block option. I belive they are 65 more lbs then a ls1.

stealth

There's a wide range of opinions on this topic, but I know that MTI now prefers the sleeved alum block, and ARE ran 8.50s with their 422 alum block NOS motor. And, yes, I've owned the LQ4 CI block and it weighs an additional ~75 lbs.

WS-Sick

If it makes you feel any better there is a member here, Y2KHawk, who runs mid 8's at 160+ mph and he's running an aluminum block (twin turbo making around 1000RWHP). He's running stock cubes as well but there is a lot more in that setup! Anyways, I would go with an aluminum block for the weight savings. They are not as weak as a lot of people seem to think.

2MuchRiceMakesMeSick

Ill stick with my iron cause I like the sound and strength. You may be right about how strong the aluminum is but the bad thing about it, when something goes wrong, ie throw a rod, the block is pretty much toast. All of my freinds that have thrown a rod have had to throw away their whole block and every one of them now have iron.