05-30-2013, 01:29 PM | #15 |
Drives: 2012 2SS TF3, 1971 Chevelle Join Date: Feb 2012
Location: Pittsburgh, Pa
Posts: 840
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Your power is in the cam and heads. The block and what you do in it are your foundation. Getting the porting right to your rpm and cam is done on a flow bench. You don't want lazy ports, you don't want to hog it out. But you kind of have to develop the entire program together. You can't max port heads/intake at home on a bench because you can't see when your going the right direction with your work or when your destroying a great port. Takes someone with talent and equipment to build a Maxx effort head.
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05-30-2013, 03:53 PM | #16 | |
Jim
Drives: 2013 Black 2SS 1LE Join Date: Apr 2013
Location: Scottsdale, Arizona
Posts: 645
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Quote:
What I need to know: 1- is the LS3 block safe at 427 cubic inches making 700 + horsepower. 2- Can I get the 660 horsepower with the mods that I mentioned? 3- How can I get to 725 + HP naturally aspirated and still be street driveable. Jim |
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05-30-2013, 05:45 PM | #17 |
Drives: 2012 2SS TF3, 1971 Chevelle Join Date: Feb 2012
Location: Pittsburgh, Pa
Posts: 840
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I can't help you there, I'm a BB Ford kind of guy :-)
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05-31-2013, 07:55 AM | #18 |
Drives: 2010 aqua blue SS/RS M6 Join Date: Feb 2010
Location: plainfield, IL
Posts: 2,706
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I am pretty sure you can safely go to 427 on the stock block. I am not sure about what power level, but there are a few guys on the site that have gone 427. You can get the 427 stroker kit from texas speed!
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10.91 at 122 H/C stock block N/A
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05-31-2013, 10:30 AM | #19 |
Drives: 2013 A6 GT 5.0 Join Date: Nov 2009
Location: Edmond, OK
Posts: 2,909
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Personally I would recommend a ERL re sleeved short block for 427ci or over. People have had issues with the 4.1 inch stroke on a stock LS3 block. With the ERL short block, after market LS7 heads, matching cam and Fast 102 intake, I think 750 crank horsepower is very doable.
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BLK/BLK 1SS/RS Ordered 11-01-2009 Took delivery 12-22-2009. Heads/cam/converter/bolt ons. SOLD Feb 2015 to fund 6th gen LT1 SS with 8L90E.
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05-31-2013, 11:35 AM | #20 |
Drives: 2012 45th Vert, 2011 4x4, 9sec Vega Join Date: Mar 2012
Location: Canada
Posts: 2,188
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12k for an 800hp big block?
Nope. Lucky to find a used one for that price
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I feel it only fair to warn you, I have a black belt in CAPS LOCK.
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05-31-2013, 03:42 PM | #21 | |
Jim
Drives: 2013 Black 2SS 1LE Join Date: Apr 2013
Location: Scottsdale, Arizona
Posts: 645
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Some Questions
Quote:
What is ERL? Is that a company? When you say people have issues with the 4.1 inch stroke on the stock LS3, does that mean that it doesn't develop enought torque and by making it less square the engine is a better torque performer? Who can do this kind of work? Are we talking Hennessey, Ligenfelter, SLP? Relative to the comment from willhe64, I quoted $15000 for a complete LSX 454. Thats what I thought I saw in one of Chevy performance books. It is rated I believe at 740 hP. I'll check and get back to you guys. Jim |
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06-01-2013, 08:11 PM | #22 |
Drives: SIM 2010 2SS/RS LS3 LPE750 Join Date: Feb 2012
Location: Mckinney, Texas
Posts: 764
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The LSX includes the LS7 427, and yes a maggie, heads and cam for $12k will way out perform the big block.
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06-02-2013, 01:42 PM | #23 |
Drives: Black ZL1 Join Date: Apr 2013
Location: City of Champions, Alabama
Posts: 3,698
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572 Baby! Who doesn't want one!(notice there is no question mark because that wasn't a question)
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06-07-2013, 02:08 AM | #24 |
Jim
Drives: 2013 Black 2SS 1LE Join Date: Apr 2013
Location: Scottsdale, Arizona
Posts: 645
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What is a 572?
Really, I'm not kidding. I'm kind of new at this. What is a 572?
Jim |
06-07-2013, 05:13 AM | #25 |
Drives: 2012 2SS TF3, 1971 Chevelle Join Date: Feb 2012
Location: Pittsburgh, Pa
Posts: 840
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06-10-2013, 01:12 PM | #26 |
Jim
Drives: 2013 Black 2SS 1LE Join Date: Apr 2013
Location: Scottsdale, Arizona
Posts: 645
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My plan for the 1LE which I am looking to purchase.
Bored to 427, thats 54 more cubic inches and shaved heads for increased compression(not sure how much). This should be good for 100 to 120 horsepower. Headers, cam, cold air, tune should be good for another 100 to 120. That gives me at best 240 horsepower more for 666 horsepower. A little short of my goal, want 750 at the crank. Am I being to conservative on my estimates or just going in the wrong direction. Besides the above, what I need to know: 1- is the LS3 block safe at 427 cubic inches making 700 + horsepower. 2- Can I get the 660 horsepower with the mods that I mentioned? 3- How can I get to 725 + HP naturally aspirated and still be street driveable. Jim[/QUOTE] You guys have been great, but the above questions and responses would make an awesome thread. LOL. Yes, I am trying to convince you to help me. Jim |
06-10-2013, 01:55 PM | #27 | |
Drives: 2000 Pontiac Trans Am Join Date: Jan 2013
Location: Houston, TX
Posts: 73
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Quote:
Personally, I like the saying, "there is no replacement for displacement". Years ago, SAM built a 468ci BBC (stock crank, rods, and cheapo KB pistons) with oval port heads (to BBC guys, they're about as desirable as LS1 853/341 castings) and a carburetor and made 636hp. Total cost was probably around $6k for everything. |
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06-10-2013, 02:16 PM | #28 | |
Drives: 2012 Camaro 2SS/RS Join Date: Dec 2011
Location: Dover, NH
Posts: 678
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Quote:
You guys have been great, but the above questions and responses would make an awesome thread. LOL. Yes, I am trying to convince you to help me. Jim[/QUOTE] Honestly with the money you're putting into that engine you might save $$ by getting a ZL1 and adding headers and a cam. Sent from my Galaxy S3
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2012 Camaro 2SS/RS, Hurst Short Throw, IdealG M/C, Pypes Pipe Bomb, LSR Cold Air Intake, LSR Toe Links/Lower Control Arms Clear Image headers, high flows, Slowhawk tune
1974 Chevy K10 Built 355, FAST EZ EFI, 5speed 2000 Chevy Tahoe LT 5.3L, Slowhawk tune |
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