How Much Work for a C5R block.
Thread Starter
Burning Brakes
Joined: Oct 2009
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From: Paramus NJ
How Much Work for a C5R block.
I have been toying with the idea of building a C5R block for my FI C6Z. What hurdles do I face in this project? Has anyone else on the forum done it yet? I have heard that this is the closest thing to a bullet proof block you can get. Any thought? Suggestions?
Former Vendor
Joined: Nov 2008
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From: Virginia Beach Virginia
C5R blocks were great 10 years ago, but with the other blocks that are available today,they are pretty antiquated. The RHS block is a much better piece.
Melting Slicks
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From: Scottsdale Az
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Melting Slicks
Joined: Feb 2006
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From: Scottsdale Az
I also stay away from the Iron LSX motor unless you really need it. An ERL superdeck can handle 1500hp without the extra weight for example.
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From: West Bloomfield MI
Why pay through the nose for old technology?
Unless you're looking for a ***** out drag car I'd probably do an LS3 with a turbo or blower.
What sort of power are you looking for and how do you plan on using it (road race, drag race, etc)?
Unless you're looking for a ***** out drag car I'd probably do an LS3 with a turbo or blower.
What sort of power are you looking for and how do you plan on using it (road race, drag race, etc)?
Thread Starter
Burning Brakes
Joined: Oct 2009
Posts: 1,231
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From: Paramus NJ
I wouldn't exactly consider an LS3 that much better for boost over an LS7. My LS7 is making 677rwhp and it is running just fine.....for now. But I always have it in the back of my mind that it could all go wrong at any time. I would actually like a car that I can drive at any time that makes 1000 or so rwhp on a motor that is actually built to handle it. I realize many other parts on the car will need to be upgraded also but right now im just thinking of the motor.
Burning Brakes
Joined: Oct 2010
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I wouldn't exactly consider an LS3 that much better for boost over an LS7. My LS7 is making 677rwhp and it is running just fine.....for now. But I always have it in the back of my mind that it could all go wrong at any time. I would actually like a car that I can drive at any time that makes 1000 or so rwhp on a motor that is actually built to handle it. I realize many other parts on the car will need to be upgraded also but right now im just thinking of the motor.
Also it's my [limited] understanding that the ls3 is a lot meatier around the bores making it better (plus the stock CR).
Thread Starter
Burning Brakes
Joined: Oct 2009
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From: Paramus NJ
Yes the LS3 has thicker side walls but still really isn't built for major amounts of boost. It is a bit better than the LS7 but still not going to handle 1000hp for any extended periods of time. The reason I had mentioned the C5R block was because I have heard from many that you could boost it until the cows come home. Now with this thread i'm thinking maybe the RHS block may be my best option. For now (knock on wood) my LS7 is running like a clock with 800 at the crank. When I am ready for my new built I am going to boost this LS7 as far as it will go. Just to see for myself. I would also like to drop in some dished pistons to my LS7 and see how far it will go. I hear that the pistons are always the first to go and that the block actually hold up much better than what people give it credit for.
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From: West Bloomfield MI
There are tons and tons of LS1 and LS6 cars running around for years at that power level.
That's always the case & is true for everyone, regardless of how expensive their motor. There is a reason many racers have spare motors ready to go.
Does your LS7 have a built lower end? I could see upgrading the pistons, rods, bolts, etc, but the block itself isn't in danger at under 700hp.
Does your LS7 have a built lower end? I could see upgrading the pistons, rods, bolts, etc, but the block itself isn't in danger at under 700hp.
Thread Starter
Burning Brakes
Joined: Oct 2009
Posts: 1,231
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From: Paramus NJ
There are tons and tons of LS1 and LS6 cars running around for years at that power level.
That's always the case & is true for everyone, regardless of how expensive their motor. There is a reason many racers have spare motors ready to go.
Does your LS7 have a built lower end? I could see upgrading the pistons, rods, bolts, etc, but the block itself isn't in danger at under 700hp.
That's always the case & is true for everyone, regardless of how expensive their motor. There is a reason many racers have spare motors ready to go.
Does your LS7 have a built lower end? I could see upgrading the pistons, rods, bolts, etc, but the block itself isn't in danger at under 700hp.
Drifting
Joined: May 1999
Posts: 1,370
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From: Garwood NJ
Yes the LS3 has thicker side walls but still really isn't built for major amounts of boost. It is a bit better than the LS7 but still not going to handle 1000hp for any extended periods of time. The reason I had mentioned the C5R block was because I have heard from many that you could boost it until the cows come home. Now with this thread i'm thinking maybe the RHS block may be my best option. For now (knock on wood) my LS7 is running like a clock with 800 at the crank. When I am ready for my new built I am going to boost this LS7 as far as it will go. Just to see for myself. I would also like to drop in some dished pistons to my LS7 and see how far it will go. I hear that the pistons are always the first to go and that the block actually hold up much better than what people give it credit for.
