Are forged pistons enough?
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Are forged pistons enough? For large amounts of boost on a stock ci LS1, are forged pistons enough to handle 12+ psi without doing forged rods as well? Which is typically the first to go in a situation like this?
This is the way I look at it with every motor I build. I never use anything questionable. Would'nt it suck to spend money to tear down the entire motor, hone the block, and then spend $900 on pistons and rings just to snap a rod! You would really be kicking yourself in the ***.
.... ask cablebandit you can push it pretty far 12psi is easily achieveable as long as pistons are dished and/or 6.0L heads. Jerry chime in on this one and give your insight.
Originally Posted by EightBallWS6
For large amounts of boost on a stock ci LS1, are forged pistons enough to handle 12+ psi without doing forged rods as well? Which is typically the first to go in a situation like this?
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Im looking to get up to the 600 rwhp mark eventually with a turbo. I already have the 6.0L heads so my compression is down a few marks. I would get lower compression pistons if I were to do this, but I wanted to know if rods were a necessary upgrade in this situation. I have done a search and found conflicting opinions, some say the stock rods are great, some don't seem to agree so much. I'm looking for about a 9.0:1 compression once it's finished.
PS - are the LS6 rods any stronger than the stock LS1?
PS - are the LS6 rods any stronger than the stock LS1?
Originally Posted by EightBallWS6
Im looking to get up to the 600 rwhp mark eventually with a turbo. I already have the 6.0L heads so my compression is down a few marks. I would get lower compression pistons if I were to do this, but I wanted to know if rods were a necessary upgrade in this situation. I have done a search and found conflicting opinions, some say the stock rods are great, some don't seem to agree so much. I'm looking for about a 9.0:1 compression once it's finished.
PS - are the LS6 rods any stronger than the stock LS1?
PS - are the LS6 rods any stronger than the stock LS1?
Forged pistons is a good call, but if I were going to go that far I think I'd spend at least another $500 on a set of Eagle rods. There are better rods out there, but I think the Eagle rods are a big improvment over stock for the $. If you don't want to change the rods when you have it all apart, at least add a set of ARP rod bolts... then again, by the time you buy the bolts and have everything balanced, you could almost buy that cheap set of Eagle rods.
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I was trying to do a stock rod forged piston motor. I had some try to disuade from doing it and after talking to a few, they are right. It's not because the stock rods aren't strong enough, it's because it's hard to find a piston that fits the stock rod! I called around and it's almost the same cost to do eagle rods + diamond pistons as it is to just get custom pistons made.
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From: Albuquerque, NM
Rumor is the rods/pistons are fairly stout. Some of the truck guys have pounded stock motors right before a motor swap to find the limits ( took dry N2O and high boost to make it whimper ).
At a minimum slap in some aftermarket rod bolts ( ARP for me ). For the revs get some hardened or chromoly pushrods and have fun!
At a minimum slap in some aftermarket rod bolts ( ARP for me ). For the revs get some hardened or chromoly pushrods and have fun!
I'll let you know in a month, the motor in the car I just bought has forged pistons (like 9.7:1 compression) and stock rods with the better ARP bolts. I dont forsee any problems with 12-13psi but I'll be the first to know 
Originally Posted by kp
I'll let you know in a month, the motor in the car I just bought has forged pistons (like 9.7:1 compression) and stock rods with the better ARP bolts. I dont forsee any problems with 12-13psi but I'll be the first to know
Darn clutch issues, can't get the sucker to bleed 
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Wow, you guys really like to push it 
So how much boost do you think I can run on my new combo, 8.7:1 CR and 91 octane? Engine is fully built with forged pistons, Eagle rods, ARP rod bolts, ARP head studs, TEA 6.0 o-ringed heads, etc.
- Dug
So how much boost do you think I can run on my new combo, 8.7:1 CR and 91 octane? Engine is fully built with forged pistons, Eagle rods, ARP rod bolts, ARP head studs, TEA 6.0 o-ringed heads, etc.
- Dug
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After having read through the responses, I decided to search for forged pistons that would fit stock rods. The first place I looked was thunder racing and I noticed that a bunch of the various Diamond piston models included the stock size .945 x 2.500 wrist pins, and one of the JE sets did as well. Are these simply not good brands and this is why people don't even bring them into the conversation or what?
-Mario
-Mario
Originally Posted by EightBallWS6
After having read through the responses, I decided to search for forged pistons that would fit stock rods. The first place I looked was thunder racing and I noticed that a bunch of the various Diamond piston models included the stock size .945 x 2.500 wrist pins, and one of the JE sets did as well. Are these simply not good brands and this is why people don't even bring them into the conversation or what?
-Mario
-Mario
i would get rods as well. I have always run stock rods but have recently seen some things I didnt like in them. They seemed fine to 600rwhp but after that, I think they are getting risky.
