C5-R Block
Race Director
Joined: Oct 2004
Posts: 12,859
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Niice!
Some rare hardware there. All you need is a block? The exact opposite of me lol
Well these blocks are stupid expensive if you buy from retailer. Mine was aborted by 2 previous owners is how I got my hands on them. Still never used. I have to finish up my falcon first (also on YouTube channel) then I'll get after this one and plan on posting progress of this build to keep the community updated.
Do you have any pics of those heads you can share?
Thanks
Some rare hardware there. All you need is a block? The exact opposite of me lol
Well these blocks are stupid expensive if you buy from retailer. Mine was aborted by 2 previous owners is how I got my hands on them. Still never used. I have to finish up my falcon first (also on YouTube channel) then I'll get after this one and plan on posting progress of this build to keep the community updated.Do you have any pics of those heads you can share?
Thanks
Thread Starter
Pro
Joined: Mar 2018
Posts: 620
Likes: 91
From: Sacramento CA
Hmmmm. Has your C5R block been all final machined and prepped? If not, THAT may be why the 2 PO's gave up and sold the block!! IIRC, the C5R blocks came with a 4.117 bore, and needed a considerable amount (read: expensive) of machining elsewhere before they can be run. Maybe align boring? Can't remember, been too long. You may want to check on that, too. As posted, Katech knows these engines intimately.....
1st Owner lost his way from what I gathered. When my Falcons done we'll get after this motor.
Thread Starter
Pro
Joined: Mar 2018
Posts: 620
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From: Sacramento CA
Race Director
Joined: Oct 2004
Posts: 12,859
Likes: 4,658
OK, then you're aware. All I was trying to convey. However, when you're done, you're going to have one sweet motor. You're a smart man stopping at a 4.125" bore. This will leave plenty of room for overbores, and the block will be at its strongest. At 4.125", I'd think the C5R block would be strong enough to spray a 200 shot, IF other internal parts are suitable for it. Best of luck building a badass ride!!
Safety Car
Joined: Dec 2009
Posts: 4,984
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From: Alberta
2022 C2 of the Year Finalist - Modified
C2 of the Year Finalist - Modified 2020
The heads alone will cost a lot more than that to machine, never mind outfit with proper valves and quality rocker setup. I expect to pay as much for the machining and dressing, as I did for the heads.
Race Director
Joined: Oct 2004
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Its an abbreviation for Hot Isostatic Pressure. Hipping is basically an advanced way to eliminate porous castings, and is a process done when the casting is formed from molten metal. It must be done then. Once it's cast, it can't be hipped after the fact. A casting is either hipped when cast, or it's not. In other words, it produces a much stronger casting. IIRC, it is done in a vacuum with centrifugal force, but I'm not sure if my memory is correct anymore. We never had the need to work with Hipping in my career as a T&D maker. Hipping is why the C5R block is so strong......And expensive!! Not sure if the C5R heads are Hipped, or not. I'd guess not.
Last edited by grinder11; Dec 19, 2022 at 12:38 PM.
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Burning Brakes
Joined: Sep 2006
Posts: 1,102
Likes: 91
From: Littlerock Ca
I don't think making 750fwhp will be a problem. My 7.0, stocks heads, msd intake, btr stage 4 cam on 91 made 564rwhp or 665fwhp.
My 6.0 bored .060, same btr stage 4 cam, ported msd intake, ported ls7 heads, jesel mohawk rockers running on e85 made 593rwhp or 698fwhp.
The ported heads are 45hp over stock heads on the 6.0 and e85 is 30hp.
My next build will be my ls7 with tbe ported heads and e85, it should be around 640rwhp which right at 750fwhp.
I say flywheel but in honesty on the dyno since it will probably run without accessories it will be 20 to 30 hp more.
My 6.0 bored .060, same btr stage 4 cam, ported msd intake, ported ls7 heads, jesel mohawk rockers running on e85 made 593rwhp or 698fwhp.
The ported heads are 45hp over stock heads on the 6.0 and e85 is 30hp.
My next build will be my ls7 with tbe ported heads and e85, it should be around 640rwhp which right at 750fwhp.
I say flywheel but in honesty on the dyno since it will probably run without accessories it will be 20 to 30 hp more.
Thread Starter
Pro
Joined: Mar 2018
Posts: 620
Likes: 91
From: Sacramento CA
I don't think making 750fwhp will be a problem. My 7.0, stocks heads, msd intake, btr stage 4 cam on 91 made 564rwhp or 665fwhp.
My 6.0 bored .060, same btr stage 4 cam, ported msd intake, ported ls7 heads, jesel mohawk rockers running on e85 made 593rwhp or 698fwhp.
The ported heads are 45hp over stock heads on the 6.0 and e85 is 30hp.
My next build will be my ls7 with tbe ported heads and e85, it should be around 640rwhp which right at 750fwhp.
I say flywheel but in honesty on the dyno since it will probably run without accessories it will be 20 to 30 hp more.
My 6.0 bored .060, same btr stage 4 cam, ported msd intake, ported ls7 heads, jesel mohawk rockers running on e85 made 593rwhp or 698fwhp.
The ported heads are 45hp over stock heads on the 6.0 and e85 is 30hp.
My next build will be my ls7 with tbe ported heads and e85, it should be around 640rwhp which right at 750fwhp.
I say flywheel but in honesty on the dyno since it will probably run without accessories it will be 20 to 30 hp more.
LS7 castings worked over right can flow some damn good air. I think you can get a 2.250 dia intake valve in the head and get them to around 400 CFM of air on the intake side too. With the right cubic inch, RPM, and compression I'm sure its doable.
Race Director
Joined: Oct 2004
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Thread Starter
Pro
Joined: Mar 2018
Posts: 620
Likes: 91
From: Sacramento CA
I didn't pay that for this one, but if I were to spend $6K on up for a block, I'm going Dart LS Next Aluminum over any other casting.
Tick Performance, Ed Rinke, and a few other vendors show the block available. I'd contact them or contact Schwartz Machine Co. They machine them after GM casts them so I would think they would know. I spoke to someone at Schwartz, but I don't remember asking if the blocks were still in production.
Thread Starter
Pro
Joined: Mar 2018
Posts: 620
Likes: 91
From: Sacramento CA
Curious why this block over a Dart or RHS? I know there are customers that prefer the C5.R block for nostalgia and have the pockets for them.