Screamin'Chicken

So I'm still looking for the perfect T/A but in the mean time I had a question.

My final plan is to end up with a built motor and some kind of FI that I'm undecided on yet. My question is why do people go to an iron block when I heard that the ls1 aluminium blocks can handle over 900hp? (Wrong information possibly?) And if i could get some websites that have examples of Iron blocks, prices etc it would be great. Any more info on the subject would be great thanks in advanced.

HAMRHEAD

iTrader: (8)

The stock will handle it but not as well or as long. There are a lot of pro's and cons between the two blocks. Look in the forced induction section and do a search and you will get some answers.

Screamin'Chicken

I just did a search and glanced through quite a few threads and it looks to me that most people are on the fence. Some say LS2 blocks or numerous Iron blocks. Any buddy else have an idea? Mainly with reliablity. Another cncern of mine was the extra 80+ pounds on the nose of the car. But what do you all think?

Screamin'Chicken

Any body id like some help consider this a ttt lol

greysteel_M6

iTrader: (5)

I've been wondering the same thing, I've personally never heard of an ls1 block splitting. Anyone else want to chime in.

Magnet

iTrader: (36)

i think it depends how extreme your going...if you gonna be under like 800hp or so i haven't heard any problems, higher than that i think it more your personal opinion and how everything is built...then again i don't know for sure

Screamin'Chicken

I was for sure going to go forged internals and all the other necessary things you need to get. But still Id love to stay with the stock block (mainly expense reasons) but There's no point in dumping money into a motor that's never going to last right?

TryingT/A

iTrader: (5)

I hear the stock block handles 700-800hp then splits, not to mention the problem with ringland number7. If your'e gonna have your engine out to get forged internals anyway, might as well opt for a forged 347

Screamin'Chicken

Any suggestions on were to get said 347? And how much I can expect to pay for it?

kozak

iTrader: (2)

i would like to know the answers to there questions as well as per my eventual build up. i thought the stock block could only hold like 500 max guess i was wrong.

stokedporcupine

stock bottom end internals can only hold about 500. the BLOCK itself is fine well past that. hell, there are 100's of guys on this form running well over 500 hp on a stock block

dailydriver

This is why when people build real high power turboed LSx racecars (see the newest GMHTP cover/article) with iron blocks they set the motor back as far as possible, and lighten the rest of the front end as much as they can. But you probably would not be able to/would not want to do this in a streetable f body.
BTW, the new uber beefy Warlock and Dart alloy blocks have enough material/strength to hold up to massive amounts of boost, probably for as long as any of the current iron blocks, BUT they are MUCHO dinero.

Screamin'Chicken

Can anyone give me like a ballpark cost for a iron block? Also a good brand or maker of said iron block?