Looking to start building a seperate motor in my garage and wanted to get some opinions on what block I should use for the set up, a Ls6 or C5r block? Not sure of what displacement I'm gonna go with yet 383, 396, 408, or 427. I think I might want a blower on it too. I just want some opinions from the masses on what block they would use and why.

Mmmmmmm...newww engine!

 

Or a new LS2 block when it becomes readily available. Don't know much about this block though.

 

i've got the same issue, altho i think i have a little more time to contemplate...if i get the gig i'll have at least a year to think about it(albeit in iraq). the ls6 block afaik isn't much different then your stock ls1, however the c5r is worlds apart. its also $6k. for the bare block. you might want to wait a little while, as the new Z06 is supposedly going to have a 427 c5r-type motor in it...the blocks should be comparable? might drop the price a bit, but the new z06 doesn't hit the floors til mid-2006 i beleive? all things to consider. also, afaik the new ls2 uses a 6.0L aluminum truck block.

 

I thought it was mid 2005?

 

I thought it was mid 05 as well?

 

If you have the money, I would go with the C5R block over any of the blocks you mention.

The new C6 Z06 has a lot of rumor circulating about engine displacement and power. If you have the time to wait, then it may be worth it, but the odds are against the Z06 being a 427ci right now. The common consenses is a 6.4L with 3 valve heads and a 7.0L has been rumored as of late. The 6.4L is said to be a stroked LS2 block with new heads and I haven't heard a thing about what the 7.0L would be(larger bore, longer stroke or a combo of both).

Todd

 

C5R block also uses a longer sleeve which allows you to use more stroke. I.E. 455 cubic inches.

 

i read somewhere that says the newer ls1 blocks are actually stronger, and have better oiling and cooling setup

 

TApimp you should take that link out of your signature...

 

I think you be dreaming Bro!!!

 

He should have clairified: stronger than an LS6 block.

 

anyone think the C5r block would be worth the extra cost?Isn't it like 3500 to 4000 more than a LS6?

 

Depends on how much power/RPMs you're going to be making. I'd start seriously thinking C5R when the power gets above about 800 RWHP or the RPMs get higher than 8500-9000. That's just my impression.

 

When you go to sell your car...your re-sale should be much higher if it's a C5-R blocked 427.

 

Sell my car? My car is family now, we don't sell family! Well....anyone wanna buy a 3 year old. She's cute! J/K Never really thought about the resale value though, good point.

 

Resale value is insignifigant.

You'll never get near the amount of money back for it.

 

your right, resale may be a strong word in this hobby...maybe more desirable would be a better term for the C5-R block...which should be worth a buck or two more...

BTW, your sig is priceless

 

Thanks.

Can you believe someone sent me a PM (serious? not quite sure) asking me whether or not I liked the movie?

Apparantly my sig didn't "send a strong message."

 

yea, i figure so saved me about $50...I was going to take my wife to it.

 

If your going to boost it I'd go with the C5R. The LS1/LS6 has a lot of head lifting issues with boost. I think the main reason the Lingenfelters hold up is because they are C5R's.