LS7 a 7.0L
I think you were looking at a C5R block.
Look at page 40 of the new Car & Driver (Nov.). It has a small story on a GM engineer built 575HP GTO with a 6.4 liter LS7 block from next years Z06. Some people have rough jobs
Look at page 40 of the new Car & Driver (Nov.). It has a small story on a GM engineer built 575HP GTO with a 6.4 liter LS7 block from next years Z06. Some people have rough jobs
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Originally Posted by 01TA
I think you were looking at a C5R block.
Damnit Louis
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I cant wait to get ahold of that 7.0 block and stroke it out to the max and go all out on it.If a lot of us are getting 500HP plus out of the LS1 at the crank what do you think a stroked 7.0 L is gonna make? Should be enough to go low 10's , maybe even high 9's NA. Add a 150 shot and your gonna make enough HP to run 8's. Then the trick will be to make the car use all that new found HP and TQ. I can't wait. My next 2 years tax return will be spent on this project
I haven't seen it mentioned in this thread, but a 4.1x bore won't give you 7 liters on a stock ls1 stroke. Its gonna have to have a 4" crank too. So we aren't only getting a GM big bore block but we also get a factory 4" stroker crank.
Factory GM high-flow big valved heads anyone?
Factory GM high-flow big valved heads anyone?
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Originally Posted by BigTex
Factory GM high-flow big valved heads anyone?
Teching In
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From: Columbia, MO
I haven't seen it mentioned in this thread, but a 4.1x bore won't give you 7 liters on a stock ls1 stroke. Its gonna have to have a 4" crank too. So we aren't only getting a GM big bore block but we also get a factory 4" stroker crank.
how you know its the LS7 and not just a C5-R block? Also is that the CTS-V from the speed GT class? If so I though they where stock cubes cause of the rules in that class????? Just wondering not trying to be a kill joy.
Thread Starter
Joined: Oct 2004
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From: Phoenix, AZ
Here is a pic of the back of the block, and an enlargement of the casting number:
According to the CTS-vR tech sheet the block's p/n is 12571246; that seems to gel with the pic. This is definitely a different number than the C5R block.
According to the CTS-vR tech sheet the block's p/n is 12571246; that seems to gel with the pic. This is definitely a different number than the C5R block.
Staging Lane
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From: Flint, Michigan (Yeah, the little "F" you might find on your VIN)
Originally Posted by Sabre002
That intake and TB sure look like LS2 parts
Damn pessimist.
The CTS V in WC was NOT allowed to run the 7 liter.
They are using the LS2 TB. Its more like the LS2 is using the LS7 TB
The "Super V" that is supposed to Debut soon has a 7.0L in it. BUT, SCCA did not want the 7.0L running.
So, they made them destroke it. Cmon people, read the thread before you post.
They are at a 4.150 bore, on a 3.27 stroke. Thats almost 6 liters.
This IS the LS7 block for crying out loud.
As for the cause of the LPE head- They are ported too large, and over time they are weakened, and crack. Not something you would see on a street car, but they supposedly fixed this problem.
They are using the LS2 TB. Its more like the LS2 is using the LS7 TB
The "Super V" that is supposed to Debut soon has a 7.0L in it. BUT, SCCA did not want the 7.0L running.
So, they made them destroke it. Cmon people, read the thread before you post.
They are at a 4.150 bore, on a 3.27 stroke. Thats almost 6 liters.
This IS the LS7 block for crying out loud.
As for the cause of the LPE head- They are ported too large, and over time they are weakened, and crack. Not something you would see on a street car, but they supposedly fixed this problem.