LS7 a 7.0L

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Oct 19, 2004 | 08:15 AM

#21

GregWS6&z28

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From: Portsmouth, VA

why do you think itll be the LS7 if it's in a race car? there's already been documentation out stating it's gonna be a 6.4 ???

Oct 19, 2004 | 08:32 AM

#22

Fulton 1

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Quote:

Originally Posted by GregWS6&z28

why do you think itll be the LS7 if it's in a race car? there's already been documentation out stating it's gonna be a 6.4 ???

That old RPO list that you're refering to appears to be outdated. There have been credible reports floating around for some time now insisting that the engine targets were not being reached with the 6.4L, hence the move to 7.0L.

Oct 19, 2004 | 08:59 AM

#23

Bink

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Quote:

Originally Posted by Chris442

Looks like the Caddy team forgot to use some duct tape. I was at the World Challenge race at Laguna Seca over the weekend, and I got to see the Pratt & Miller boys change an engine in one of the CTS-vR's. Look what was cast into the block:

ohhh YEAH!!!!!!!!!!!!!!!

Oct 19, 2004 | 09:15 AM

#24

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Quote:

Originally Posted by Louis

NA, 358 CID. 4.1xx bore, 3.2xx stroke, 2.12 intake valves and so on...

So it's a destroked C5R???

Oct 19, 2004 | 09:26 AM

#25

Louis

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From: Frisco/Wylie

for THAT car, they would not allow the full 7 liter. It was dominant as it was, think what it would do if it had another 8 tenths of stroke

Not really a C5R. LS7 Joel

They are similar in many ways, but definately not a C5R.

Oct 19, 2004 | 10:41 AM

#26

Roadie

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From: Breese, IL

Quote:

Originally Posted by 2MuchRiceMakesMeSick

Is that a intercooler I see under the hood with a 427R. Someones got alot of money in that setup

I think that's a Ron Davis radiator. I guess you could call it a water to air intercooler.

Oct 19, 2004 | 11:26 AM

#27

under_construction

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From: DFW, TX

Oh boy, will there be some great parts floating around in a few months. Anyone wondering how they were running 7900rpms with a valvetrain that fits under those stock appearing valve covers?

Oct 19, 2004 | 11:36 AM

#28

King02SS

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From: Edmond, OK

Great pics! I wonder when the block itself will be available?

Oct 19, 2004 | 02:15 PM

#29

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Quote:

Originally Posted by Louis

for THAT car, they would not allow the full 7 liter. It was dominant as it was, think what it would do if it had another 8 tenths of stroke

Not really a C5R. LS7 Joel

They are similar in many ways, but definately not a C5R.

Thanks for the clarification Louis

Looks like my LS6 motor will be replaced by an LS7.

Any ideas when I'll be able to buy forged internals for the LS7???

Oct 19, 2004 | 03:24 PM

#30

black_z

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Nice camera work man.

Oct 19, 2004 | 03:37 PM

#31

gonzo 6.2

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From: oregon

I dont believe that is a knock sensor,that looks just like the block heater on my 6.0

Oct 19, 2004 | 03:42 PM

#32

GMCtrk

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From: Houston, TX

are you sure that's just not a C5-R block?

Oct 19, 2004 | 03:53 PM

#33

Buff

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From: Raleigh, NC

it could be a c5r block, but to me looking at that completely motor setup , that could very much be the ls7. correct me i am wrong but the c5r motor didnt have the new style GM throttle body on it and the crazy looking intake..

if you wsa you dude, i be selling those pics to autoweek or something

Oct 19, 2004 | 04:04 PM

#34

Mallett396

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From: Columbia, MO

Quote:

Originally Posted by Buff

True, but if anyone could make the Ls2 parts work on a C5-R block, it would be them. I'm not convinced, until someone posts a pic of a C5-R block that is visually different. Although, the knock sensor could be a clue....

Oct 19, 2004 | 04:11 PM

#35

Louis

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From: Frisco/Wylie

Its not a C5r block.

The heads are LS7 guys, different valvecovers as well. They Look the same, but they are not. Dont assume anything with this motor.

This is GM that is doing all of this. They can make anything happen.

Ill dig up some part numbers for you guys.

Oct 19, 2004 | 04:33 PM

#36

Chris442

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I've got another pic of the casting number of the block, and it definitely isn't a C5R. It's a crappy pic, but I can see 1257xx4x. That agrees with the numbers published here at the World Challenge site. In the same pic you can also see the 7.0L on the back of the block.

Last edited by Chris442; Oct 19, 2004 at 05:04 PM.

Oct 19, 2004 | 04:38 PM

#37

Phoenix 5.7

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From: Prairie de Femme, LA

its a different version of the C5R block, its re sleeved and restroked to a 356 or somewhere about there emphasising revs. the 7.0l is from the base C5R block. that may be a new intake manifold, but the C5R already has rectangular ports.