Can a stock LS1 be built to handle more boost?
01-18-2009, 08:56 PM
#1
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Can a stock LS1 be built to handle more boost? I am buying a D1SC kit very soon, and am wondering what I have to do to build the stock block to handle more boost. I understand my stock on LS1 can handle 550-600 rwhp? Can I build it up to handle more hp? What can I do, and how much max rwhp wil it be able to handle?
Thank you!
Thank you!
01-18-2009, 10:17 PM
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Sounds like a steep order to fill on a stock short block. Pistons would never take that much boost without busting the ring glands. Least parts I would think you could get away with are pistons and rods. Crank could probably stand that may want to have balanced and polished up while you had things apart if you wanted
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01-20-2009, 12:37 PM
#9
Mine did great too for quite a while with a good tune, but it was at 489rwhp. And I still ended up breaking a piston.To answer the OP's question: you kinda contradict your own question. How do you "build up" a completely "bone stock everything" engine? That makes no sense at all.
You will be on the edge of the fence at 500-550rwhp as to what the stock pistons can handle. Nothing can change that. But as has already been mentioned, the stock block and crank should be good to 800 rwhp easily. Best you can do to a stock short block is to put some 317 truck heads on to lower the compression a bit. That will help out, but the stock pistons are still crap..
01-20-2009, 02:31 PM
#10
this info is useless unless you were making above 550rwhp.. Mine did great too for quite a while with a good tune, but it was at 489rwhp. And i still ended up breaking a piston.
To answer the op's question: You kinda contradict your own question. How do you "build up" a completely "bone stock everything" engine? That makes no sense at all. You will be on the edge of the fence at 500-550rwhp as to what the stock pistons can handle. Nothing can change that. But as has already been mentioned, the stock block and crank should be good to 800 rwhp easily. Best you can do to a stock short block is to put some 317 truck heads on to lower the compression a bit. That will help out, but the stock pistons are still crap..
Mine did great too for quite a while with a good tune, but it was at 489rwhp. And i still ended up breaking a piston.To answer the op's question: You kinda contradict your own question. How do you "build up" a completely "bone stock everything" engine? That makes no sense at all.
You will be on the edge of the fence at 500-550rwhp as to what the stock pistons can handle. Nothing can change that. But as has already been mentioned, the stock block and crank should be good to 800 rwhp easily. Best you can do to a stock short block is to put some 317 truck heads on to lower the compression a bit. That will help out, but the stock pistons are still crap..
01-21-2009, 05:01 AM
#11
I am buying a D1SC kit very soon, and am wondering what I have to do to build the stock block to handle more boost. I understand my stock on LS1 can handle 550-600 rwhp? Can I build it up to handle more hp? What can I do, and how much max rwhp wil it be able to handle?
Thank you!
Thank you!
The above Corvette was run hard on a 2.1 mile road course for two years, no durability problems. This car was also driven on a vacation from Chicago to the East Coast and back, and got 28 mpg. Here is a link to this car. http://www.exoticperformanceplus.com...Car.php?car=54
Here is what we charged for this engine build.
http://www.exoticperformanceplus.com...php?service=85 Bob
01-22-2009, 11:44 AM
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Hmmm... I am like everyone else, dont completely understand the question. Are you asking if there is anything you can do to your stock block without rebuilding it? Not really... you can put some LQ9 truck heads on it dropping your compression some, making your stock engine a little more capable to the boost. But I think the breaking point is still the same... its usually your #7 piston due to lack of fuel, breaks the ringland. (#7 is the back right piston as you look at the front of the car)
I was always curious if you swapped intakes to the edelbrock if that would fix that problem and give you more life in the engine.
My stock block saw 607RWHP... didnt last long there, saw blowby and broke my #7 on the 3rd-4th run down the strip at that boost level.
I was always curious if you swapped intakes to the edelbrock if that would fix that problem and give you more life in the engine.
My stock block saw 607RWHP... didnt last long there, saw blowby and broke my #7 on the 3rd-4th run down the strip at that boost level.
01-22-2009, 01:15 PM
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No I dont think so... they are still the same basic design... all your air must first enter from the front... and pass across all our other pistons... leaving #7 for last!
The edelbrock intake the air comes center top and more evenly spreads... dont know if this has been tested on a stock block though.
The edelbrock intake the air comes center top and more evenly spreads... dont know if this has been tested on a stock block though.
01-22-2009, 08:32 PM
#17
Guys! Do a little research.. The intake direction does not solve the lean#7 issue. People have turned the intake completely around backwards to where the air enters towards the rear of the engine and #7 STILL has the same problem. The general consensus is that the lean#7 is primarily due to the blocked off cooling passages through the top of the heads where they are blocked off on the newer LS1 engines with LS6 intakes. So in short, a vic jr intake will do nothing for that particular issue.
Bottom line is that no matter how equal the airflow and fuel distribution, the stock crap pistons can only handle so much power! That is generally in the 500rwhp range. Mine broke a ringland at 489rwhp, and it was the #5 piston that let go, not #7. There is no *magic* way to make the stock internals handle a lot of HP. They were never designed for it, and they sure aren't built for it. If you want to make more than 500rwhp SAFELY then do yourself a favor and get a forged bottom end. Then you can worry about everything else thats gonna line up to break next including driveshaft, 10 bolt, etc. etc. etc.
Bottom line is that no matter how equal the airflow and fuel distribution, the stock crap pistons can only handle so much power! That is generally in the 500rwhp range. Mine broke a ringland at 489rwhp, and it was the #5 piston that let go, not #7. There is no *magic* way to make the stock internals handle a lot of HP. They were never designed for it, and they sure aren't built for it. If you want to make more than 500rwhp SAFELY then do yourself a favor and get a forged bottom end. Then you can worry about everything else thats gonna line up to break next including driveshaft, 10 bolt, etc. etc. etc.
