How Much Boost (LT1)?
05-01-2009, 11:42 PM
#1
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How Much Boost (LT1)?
Hey all, thanks for reading. I have a pretty stock LT1 that I want to throw a Procharger on. Engine mods include 594/594 lift cam, 1.6 R/As, CC Beehive valve springs, headers w/cutouts or duals w/x pipe when cutout is closed, and a 160* thermostat. Basically, what I want to know, is how much boost is "safe boost" for my LT1? I don't want to put excessive wear on my engine, or rebuild it so I can run more boost. Thanks to all replies guys/gals.
05-02-2009, 12:35 AM
#3
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I've always been under the impression that the the stock rotating assembly could take about 12lbs of boost and 15lbs pushing the limits, but I'm not a boost guy so I have not done much research on this subject.
05-02-2009, 01:55 AM
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05-02-2009, 09:49 AM
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05-02-2009, 12:05 PM
#7
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12 to 15 lbs of boost is over the limit, I would consider 5 lbs "safe".
05-02-2009, 02:15 PM
#9
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If its any hint, most kits for stock rotating assemblies are 6lbs. I wont not run more then 8 intercooled on a stock engine. The high compression from the factory is not meant for boost.
These are not civic engines, 6psi with the proper heads and cam is a LOT of power with an otherwise stock LT1.
These are not civic engines, 6psi with the proper heads and cam is a LOT of power with an otherwise stock LT1.
05-02-2009, 04:55 PM
#10
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It seems like I remember 6-7 lbs was what many of the supercharger kits start you out at, 9 psi might be ok if you had an intercooler, but you better have a tune with it, detonation is not very kind to stock pistons. 7 psi is about a 50% gain in hp.
05-04-2009, 01:06 PM
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05-04-2009, 01:18 PM
#14
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Throw in a cheap progressive controller to numb the initial shock a little bit and the n20 is def easier on it. But the bottle always runs out
I'm pretty close to a "stock" motor. My heads are very mild and my cam is a joke. My saving grace is nearly two full points in compression. Lets say I make 275 NA (no way to test) and so far my experiences with 7-8psi have been BORING. I would rather have my heads/cam or n20 setups again. Now an awesome motor on 8psi might be different, but stockish not so much. Honestly I would say the little t70 is a bore until @ 14psi.