'Trust'

iTrader: (24)

First of all MODS; I dont really know where to post this, so feel free to move it to where ever would get me the best feedback.

Can anybody tell me the advantages of a 6.0 Iron over a 5.7 LS1 block, I know iron blocks are used for FI motors, but if a person is wanting to stay NA what is the best way to go, do the benifits of the 6.0 out weigh the weight of the iron block. I'm planning on buying a forged LS1 from a member on here once i have the rest of the $$, but im just wondering if the 6.0 is a better or not, I'd appreciate any input. Thanks guys

spanky_55amg

just coming from me. i would not do it if going n/a. i think the weight of the iron and the few cubes you get are not worth it. but this is just me.

SgtB

iTrader: (3)

You do not need an iron block for a N/A combo....

'Trust'

iTrader: (24)

Thats what i was thinking, thanks

camaroextra

iTrader: (10)

yeah a forged ls1 will get you 1000 hp with all the goodies.

the iron 6.0 block is a mirror image of the ls2, so you could get the same power but more weight. that advantages of iron are the rigidity, you can have a 7 second car if you want, but i doubt thats your goal.

what performance goals are you setting and how much power do you want?

CamdLs1

iTrader: (2)

People use the 6.0 for FI applications because of lower compression right? Why not just use the heads then? I know people do, but what are the advantages of a 6.0 besides a few cubes?

camaroextra

iTrader: (10)

you can stroke it to 4.00x4.00 and get a 402 without a really long stroke. in the new issue of chevy high performance they built one with slp/afr 225 heads , edelbrock dual plane intake manifold and an 850 cfm carb with a spacer and made 550hp on 91 octane (it was only like 10.4:1 compression). it a very streetable na engine, and it can handle a ton of boost or juice with a good rotating assembly.

that is the advantage of it, a lot of rodders with classic cars like to keep them carbeurated, and still have a very low maintenance engine

'Trust'

iTrader: (24)

My goals arent very large at all, im on the college budgets, so im just looking for around 400rwhp through a converter, NA, and then a 150shot ontop of that, i ordered heads that should be in monday, just stage II's, and when i have the money i'll b getting th motor. What are the weight differences in the iron vs. aluminum?

camaroextra

iTrader: (10)

um i may be very wrong but i think it somewher around 200 lbs (minuminm) so 360lbs vs 560lbs. in the front of your car that makes a big diff

BlueSix

I believe the iron block is 92 lbs. heavier than the aluminum block. You could always go the iron block route and do the 408. I think several of our sponsor's have iron 408 short blocks for somewhere in the $3500 range. YOu could throw those stage 2 heads on there, and a bigger cam and be easily over your goal of 400 through the converter.

FastKat

iTrader: (10)

I think it's actually about 65lbs, according to "Building High Performance LS1s/LS6s" ... don't know the author, but it's a relatively popular book.

Regardless, 65lbs is still a good bit of weight!! I went with the 5.7L aluminum over the 6.0L cast iron for just that reason. Don't forget, less weight not only lets you accelerate fast, it lets you stop faster and turn harder! ...and it will even save you some gas!