guys i'm thinking I might just get a new/low mileage shortblock instead of forging/rebuilding my current LS1.... i'm looking at the LS2 shortblocks...

my question is... what's the difference pro's/con's between an aluminum and an iron shortblock?

i know there's a weight difference... not sure how much... but anything else?

now I just gotta find one for a budget build...

 

i went with an iron 408.....budget.

 

i know it around 70lbs between an ls1 and an lq4/lq9. id say it depends on if you want forged and what you want to spend on the block. you can find used iron blocks all over, ls2 block will run a bit more.

 

Cost, weight and ability to overbore (the iron block can be bored out more), some say strength but I've seen stock blocks take some serious power.

 

If I dont solve the knocking problem in my engine, I'm going to pull the trigger and probably just buy this:
http://www.sdparts.com/product/SDLS6...kAssembly.aspx

 

that's a good find...

i've been looking at these as well...

https://ls1tech.com/forums/showthrea...6&page=1&pp=20

 

Dang thats a sweet find there. My 243 heads, Torquer2 cam should mate up to the 370 short block correct?

 

Thats cool if you want FI because those -25cc pistons.

-25cc pistons on an N/A setup would be ****. Not enough compression.

Do they offer a shortblock more for an N/A setup?

 

yea i would be N/A.... not sure if they offer a different one...

 

so is the weight difference on an iron really gonna hender you that much?

 

i went with an lq4 because it was $1000 and only had 9,000 miles on it. i have no regrets. if i ever decide to go fi i will feel better knowing its an iron block, even though it wouldnt make much difference if a rod let loose. average price of a good condition ls1 was $1000 and up, with 70,000 miles or more. i feel real good about it because i can run l92 heads instead of being stuck with overpriced aftermarket heads. the iron blocks are cheap and everywhere.

 

good to know thanks!