I am building a 414CI 6.0L stroker... should I go iron or alum?
 

Like the title of my thread says, I am building a 414CI 6.0L stroker to go into my 2002 Z28. The car will see a combination of street and 1/4 duty... I am shooting for a pretty streetable 500RWHP and will be spraying a 150 TNT ring kit. My original plan was to go with an iron block, but I am now thinking about going with an aluminum LS2 block. The price difference is only a couple hundred dollars... I would like to hear some feedback as to which would be the best choice? Thanks!

Some people are telling me the LS2 block 'flexes' more than the iron one and I should not go with an LS2 stroker... is there any thruth to this?

I can't comment on the flex question, but if it is not that much, I would just get the stronger of the two :)

-Todd

I think the price difference will be more, once you factor in all the covers you need (timing, rear, oil pan, valley, etc). I don't think they all 'carry over' from the LS1 style block. You'll probably end up spending $1000 more for the aluminum over the iron, once all's said and done (just my guess).

And who is telling you it 'flexes'? Do they have any firsthand LS2 experience? It's so new, I doubt it. I have a feeling they're just talking out their @ss. ;)

That said, I'd do the LS2 just because it saves weight over iron. 80 lbs becomes a lot of weight when you hit about 3200-3300 lbs. ;)

The LS2 is not capable of being bored to 4.060, so if that was what you were thinking, 4 inch stroke X 4.060 bore =414. With a 4 inch crank and the 6.0 block, you would get a 402.

Unless you are going to get it sleaved, then you would go bigger than 414.

Ryan K.

My personal opinion would be to stay with the Iron. We have achieved the power level you are searching for with iron 408's. However at this point the LS2 is still somewhat un-charted territory. Not many folks have taken the bore that big, and if they have there aren't that many miles on said combo to see what the survival rate is.

Iron 408's make power, its proven to work time and time again. My advice is to stay with the iron, and go with whats proven. At least for now.

The good thing about the iron block is you can go 4.060. The LS2 is a lighter weight block that will go 4.020 at the most. I highly doubt there is a flex problem with the LS2. Another way to get bigger cubes with the LS2 is go with more stroke. Callies has a few options now, and we have them in stock.

I would go with the LS2, Have you thought about heads yet? AFR to have their killer heads on the market.

As far as heads go I have my eyes on the AFR 225's... I would like to see how they work out of the box and I might get some work done to them afterwards...

The AFR 225's are going to be a very nice head and will work well with a nice stroker motor. Keep me in mind when you start pricing these, we will do our best to give you the best deal!!

Kris, you are on the ball for sure! Even though I have not yet bought anything from you I am very impressed with how responsive and helpful you are :) Do you have an idea as to when the 225's will be available? Do you have any experience shipping to Canada? Thanks