9:1 compression - what pistons to use?
9:1 compression - what pistons to use? For a blower appliction for a friend of mine (99 LS1 H/C car).
His motor is fine right now he just wants to put in lower compression pistons - what all should he consider? He wants to run about 10 psi or so of Vortech aftercooled boost.
He's got the fuel system covered, does he need new rods too?
His motor is fine right now he just wants to put in lower compression pistons - what all should he consider? He wants to run about 10 psi or so of Vortech aftercooled boost.
He's got the fuel system covered, does he need new rods too?
9 Second Club
Joined: Nov 2001
Posts: 1,445
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From: Bay Area, CA
Re: 9:1 compression - what pistons to use? rob raymer www.ls1motorsports.com has a package for a 1000 bucks, it comes with ross custom pistons pressed on to stock rods, rings, ARP bolts, all ya need to do is give back the stock rods as a core, its a sweet deal.
Staging Lane
Joined: Nov 2001
Posts: 81
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From: Newport News, Va
Re: 9:1 compression - what pistons to use? To lower compression you need to use a dished piston. JE or Ross can make these for you. I would recomend a set of H-beam rods. But that is my personal pref.
Doug
Doug
Re: 9:1 compression - what pistons to use? [quote]Originally posted by Nickn20:
<strong>rob raymer www.ls1motorsports.com has a package for a 1000 bucks, it comes with ross custom pistons pressed on to stock rods, rings, ARP bolts, all ya need to do is give back the stock rods as a core, its a sweet deal.</strong><hr></blockquote>
http://www.ls1motorsports.com/ls1cinteng.asp
Sounds like a decent deal, but I wonder what sort of boost level it will hold up to? What are the stock rods good for?
<strong>rob raymer www.ls1motorsports.com has a package for a 1000 bucks, it comes with ross custom pistons pressed on to stock rods, rings, ARP bolts, all ya need to do is give back the stock rods as a core, its a sweet deal.</strong><hr></blockquote>
http://www.ls1motorsports.com/ls1cinteng.asp
Sounds like a decent deal, but I wonder what sort of boost level it will hold up to? What are the stock rods good for?
TECH Apprentice
Joined: Nov 2001
Posts: 353
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From: Evansville, IN
Re: 9:1 compression - what pistons to use? I'm thinking about the same package from Rob. I'm not planning on running a lot of boost as I'm trying to maximize the flow inside my engine. I am curious as to how much boost it will hold though.
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On The Tree
Joined: Nov 2001
Posts: 1,100
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From: Charlestown, Indiana
Re: 9:1 compression - what pistons to use? [quote]Originally posted by jhelms:
<strong>
Sounds like a decent deal, but I wonder what sort of boost level it will hold up to? What are the stock rods good for?</strong><hr></blockquote>
John, this is a direct quote from my response to the email I received from you:
"It's not how much boost they will take, but rather how much detonation they won't take. The stock rods can handle roughly 700fwhp, and even more with the ARP bolts installed."
As you've all heard a million times by now, detonation kills. No matter which rod/piston combination you have.
These particular Ross pistons have 2 valve reliefs, and will lower compression to approximately 9.8:1. Though we can have them built to any desired compression ratio.
Hope that helps,
Rob Raymer
LS1 Motorsports
www.LS1Motorsports.com
"World's Fastest Forced Induction LS1"
9.94 @ 136.37 - '98 Z28 Single Turbo
<strong>
Sounds like a decent deal, but I wonder what sort of boost level it will hold up to? What are the stock rods good for?</strong><hr></blockquote>
John, this is a direct quote from my response to the email I received from you:
"It's not how much boost they will take, but rather how much detonation they won't take. The stock rods can handle roughly 700fwhp, and even more with the ARP bolts installed."
As you've all heard a million times by now, detonation kills. No matter which rod/piston combination you have.
These particular Ross pistons have 2 valve reliefs, and will lower compression to approximately 9.8:1. Though we can have them built to any desired compression ratio.
Hope that helps,
Rob Raymer
LS1 Motorsports
www.LS1Motorsports.com
"World's Fastest Forced Induction LS1"
9.94 @ 136.37 - '98 Z28 Single Turbo
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