HAMRHEAD

iTrader: (8)

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!

HAMRHEAD

iTrader: (8)

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

cyphur

iTrader: (10)

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.

BlackCamaroSS02

iTrader: (8)

I thought it was mid 2005?

HAMRHEAD

iTrader: (8)

I thought it was mid 05 as well?

WhiteDiamond

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

LOnSLO

iTrader: (15)

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

TApimp

iTrader: (1)

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

z98

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

Chicago Crew UnderBoss

iTrader: (1)

I think you be dreaming Bro!!!

z98

He should have clairified: stronger than an LS6 block.

HAMRHEAD

iTrader: (8)

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

Colonel

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.

hugger427

iTrader: (9)

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

HAMRHEAD

iTrader: (8)

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.

z98

Resale value is insignifigant.

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

hugger427

iTrader: (9)

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

z98

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."

hugger427

iTrader: (9)

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

2001WS6Vert

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.