stock compression and boost?
TECH Apprentice
Joined: Aug 2002
Posts: 362
Likes: 0
From: Maple Grove MN
Re: stock compression and boost? I got the 12psi pulley with my 8psi kit and havent blown it up yet. But I would say 8 would be a good balance between power and reliability. That is with the proper tuning of course. I am dropping my boost this spring cuz it cant be very safe. I'll also get to use more of my RPMs then too.
Thread Starter
Conversion master
iTrader: (1)
Joined: Dec 2001
Posts: 861
Likes: 1
From: Gig Harbor, Wa
Re: stock compression and boost? I am looking to get 500 rwhp and calculated between 9 and 10 # boost. Is this doable on a stock engine? Does this sound about right?
Re: stock compression and boost? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 70 LS1:
<strong> I am looking to get 500 rwhp and calculated between 9 and 10 # boost. Is this doable on a stock engine? Does this sound about right? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sure it is, but the question will be how long will it last?. With the compression being as high as it is the motor will not last very long and you'll get a free pass to the rebuild club. Wouldnt be worth the risk to me.
<strong> I am looking to get 500 rwhp and calculated between 9 and 10 # boost. Is this doable on a stock engine? Does this sound about right? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sure it is, but the question will be how long will it last?. With the compression being as high as it is the motor will not last very long and you'll get a free pass to the rebuild club. Wouldnt be worth the risk to me.
Teching In
Joined: Feb 2002
Posts: 9
Likes: 0
From: Central New Jersey
Re: stock compression and boost? With the LS1 engine I would not recommend running more then 8 lbs of boost. At that level with an MN6 you should easily see 475 plus rwhp. If you want to go more boost, build the engine for it. The stock pistons just cant take that much cylinder pressure.
TECH Enthusiast
Joined: Dec 2001
Posts: 553
Likes: 0
From: Columbia, MD
Re: stock compression and boost? Remember, "boost" only refers to the air pressure built up in the intake manifold. It is NOT the sole factor in determining if your bottom end will hold up. For example, a heads/cam/headers car with 7PSI will be a lot more deadly than a bone stock LS1 with 9PSI. Also, aftercoolers and intercoolers can help cool the air charge and prevent detonation, allowing you to run more boost safely. You can’t just say that 7PSI is safer than 10PSI; you have to look at the air charge temperature, how well the engine flows air, cylinder pressure, and so on. So the short answer to your question "how much boost can you run on stock compression" is: it depends.
